Internet-Draft eXtensible Stateless Eqpt Data Exchange June 2025
Spencer, et al. Expires 18 December 2025 [Page]
Workgroup:
Internet Engineering Task Force
Internet-Draft:
draft-guy-xfsp-02
Published:
Intended Status:
Informational
Expires:
Authors:
M. Spencer
Avilution
E.T. Guy, Ed.
Bloomberg
NH. Hartley
Avilution

eXtensible Stateless Equipment Data Exchange

Abstract

This document presents a binary IP-based protocol to facilitate interoperable communications between electronic equipment on a platform. The protocol is UDP-based, stateless, and multicast. Messages consist of a common header followed by a series of parameters and related attributes. The parameters are always informational, e.g., indicating airspeed is 150 kts, but parameter attributes can be set to indicate intent, e.g., this parameter contains a new user selected value such as an instruction that deploys the landing gear. Although initially designed for avionics, it can be applied to other platform domains as well. This document defines the core protocol and a method to extend it to meet any domain specific needs.

Status of This Memo

This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79.

Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet-Drafts is at https://datatracker.ietf.org/drafts/current/.

Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress."

This Internet-Draft will expire on 18 December 2025.

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Table of Contents

1. Introduction

Historically, avionics and other networked equipment platforms have used private protocols for device interconnection but the trend is towards open communication leveraging standard hardware. There have been various stages in the evolution of device interconnection from point-to-point analog communication to digital serial protocols, to bus-based solutions and currently IP-based over ethernet.

One of the concerns with all of these protocols in this industry is that extensive testing is required, so developing a common protocol and library with its extensive test cases will improve time to market, product quality and safety, and lower cost.

The eXtensible Stateless Equipment Data Exchange, XSEDE, is such an IP-based protocol which provides a common means that facilitates parameter communication between networked equipment. It is an open protocol which typically operates by sending binary-encoded data in UDP packets using common Multicast over Ethernet. Typical implementation environments contain legacy networks such as CAN bus and components that have various levels of certification, e.g., levels per DO-178 [DO-178C]. This approach allows the networked platform to function as a collection of safety-critical microservices with XSEDE at the hub. XSEDE can flexibly drive multiple displays and unify all the subsystems all at the control of the system integrator.

Parameters generally fall into two separate categories: schedule-driven and event-driven. Schedule-driven parameters are those that are sent periodically by the nodes in the system. One example could be the current heading might be reported by a sensor at 10hz. These parameters have a logical expiration time associated with how long they are valid, for example, 250ms. Another example could be the current air temperature or even the current value of the pilot's desired heading (heading bug.) Event driven parameters are those that occur in response to an external stimuli, e.g., a pilot action on a switch, or an autopilot deciding to change the heading due to reaching an intermediate waypoint. These parameters do not have a logical expiration time associated with how long they are valid.

1.1. Basic Properties

XSEDE is a simple and compact protocol which uses a fast marshaling approach. Parameters may be coalesced, size and time permitting, into a single message to make transport more efficient. The message layout considers four octet alignment issues which can affect performance, especially on ARM-based architectures and pads to maintain efficiency. All messages are sent to all receivers so that the protocol is stateless and only the recipient controls whether a parameter will be processed. Since avionics software is subject to intensive testing and validation, XSEDE is designed to be deterministic with the fewest number of formal requirements required for implementation while still permitting the addition of new data formats and parameters through an extensible data model. The parameter identifier is designed to allow for either global data model additions so all nodes are aware or local data model additions if the parameter is only relevant to a subset of nodes.

User and System selected events can exhibit two distinct behaviors: an event that causes an immediate change, e.g., a radio frequency change, and those changes in which a change may take time to be reflected by the system, e.g., selecting a new flap position. In the former case, only one parameter is defined: a request would set the confidence field to USERSEL (or SYSSEL). At the same time, the radio would periodically report with the current setting. In the latter case, these settings are implemented with a pair of parameters, a request (REQ suffix) and a current state Parameter that has no specific suffix. For example, FLAPREQ and FLAPPOS (See Section 4.7) where the first indicates the requested value and the second indicates the actual value.

An example of the stateless nature of the protocol can be seen when comparing sample use cases of a few parameters (See Section 4.7). The first example is a simple system with a user interface node and a radio control node where the user interface node sends a COMFREQ parameter in an XSEDE message to set the radio frequency. The time for the frequency change to be reported is generally negligible, so a COMFREQ parameter with a confidence of USERSEL/SYSSEL for setting the frequency and a COMFREQ parameter with a confidence of RAW from the radio control node for reporting the current frequency is usually sufficient. The second example is a system with a user interface node and a flap control node where the user interface node would send a FLAPREQ parameter and then report the FLAPPOS parameter sent by the flap control node to inform the pilot of the current state of the flaps. This allows the user interface to be able to set a requested flap state without having to worry about the transition period for a given systems flaps while not precluding the ability to generate a CAS message if the flaps do not change position in a specific amount of time.

1.2. Drawbacks

XSEDE is a UDP-based protocol so packet delivery is not guaranteed. XSEDE is typically run on a purpose built network within a specific aircraft or other high reliability networks, therefore the `best-effort` nature of UDP is not of grave concern. Application-level behavior is implemented to ensure critical requests are executed. Since the protocol is stateless, it relies on the requestor to monitor status to ensure an action was taken. For example, if a request to put the landing gear down is made, the requesting application must watch reports of the landing gear position and alert if the request is not satisfied in a timely manner. However, you would be able to see if your request was correctly interpreted by a report, periodic or in response to the event, by the responsible nodes. Notably, the protocol does not contain the concept of incrementing or decrementing a value, just setting a specific value. A user interface which is designed to increment and decrement a value based on a user turning a knob, for example, must track the current value and when an increment is detected, transmit the new, incremented value with the appropriate confidence (most likely USERSEL). If two or more applications are monitoring the same knob from two different computers, they each would be able to redundantly send the same new value without affecting the behavior whether one, two or more such applications were concurrently running.

1.3. Terminology

The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all capitals, as shown here.

Message:
is the basic unit of communication in XSEDE.
Node:
is a device or process that implements XSEDE.
Parameter:
is the task specific payload contained in a message.
Attribute Format:
are the simple and structured data types associated with a parameter attribute.
Attributes:
are the values associated with a parameter.
Dictionary:
is a set of allowed values associated with an attribute, parameter, or message field.
Source ID:
Refers to the unique number which identifies the node, by convention with the upper octet representing the computer and the lower octet representing the application number within that computer.

2. Overview of XSEDE Protocol

The eXtensible Stateless Equipment Data Exchange is designed to operate on an integrated local network and comprises instruments, displays, sensors, and actuators performing various functions. XSEDE messages are sent to every node on the network. XSEDE messages are currently in one of three classes: Maintenance, Operational and Raw.

Maintenance and Operational messages consist of a header followed by a series of parameters. Parameters always represent information, a message is purely a collection of parameters. However, the confidence field must be interpreted to determine intent, i.e., the SYSSEL and USERSEL confidence levels MUST be interpreted by responsible nodes to affect changes on the relevant items.

XSEDE is stateless. There is no required protocol level response to any command, however, informational responses may be made. For instance, a command to change the radio frequency of a certain radio may generate a application-level response indicating the new radio frequency. All XSEDE messages go to all nodes which ignore messages by checking for relevant parameters by identifier.

Raw XSEDE messages consist of a message header which specifies the length of the raw data, followed by that raw data. Raw data is classified as MIL-STD-1553, CANbus, digital samples, GDL90 data [GDL90], or other serial or streaming unframed data.

Each node in XSEDE is assigned a source ID. These Source IDs MUST be unique within the XSEDE network. The Source ID and the message number uniquely identify the message and are contained in the message header. Message IDs created by a node MUST be monotonically increasing. A receiving node MUST ignore all duplicate messages. The Source ID and a message number are used to ensure messages are processed in order and only once. Messages MUST be processed in order skipping any missing messages and MUST only be processed once. Senders and Receivers must account for integer overflow in message numbers. There is no retry mechanism at the protocol level; Missing and out-of-order messages SHALL be considered lost and if received out of order, a message MUST be ignored.

In addition to the Source ID and Message Number, The XSEDE message header also contains the message class, the Message Operation ID, Flags, [DO-178C] the confidence level currently for Avionics, and the payload length.

For best performance, an XSEDE goal is to not send IP datagrams that have to be fragmented. Packets which exceed the MSS size will be fragmented. To achieve this goal XSEDE messages SHOULD be less than the network Maximum Segment Size (MSS) size in length. On a modern Ethernet network, IEEE 802.3 [IEEE8023] specifies a standard maximum payload size of 1500 bytes. The size of the fixed IPv4 header is 20 bytes [RFC0791] or in IPv6 the fixed header is 40 bytes [RFC2640] UDP headers consume 8 bytes, [RFC0768] the XSEDE header Section 4.1 uses 12 bytes leaving 1460 bytes for parameters or 1440 bytes on an IPv6 network.

3. xfsdatamodel

The xfsdatamodel tag is the root element for the XSEDE XML datamodel. The following subsections show the descendant elements and their attributes.

3.1. structures

3.1.1. structure

Table 1: structure
Attribute Mandatory Definition Default
name Yes Mandatory name for this parameter format which may only contain lower case letters a-z, underscore ('_') and digits 0-9 after the first non-digit character. No
definition No Human readable description of the purpose of this item. No
3.1.1.1. int8 - 8-bit two's complement signed integer
Table 2: int8
Attribute Mandatory Definition Default
length No If specified, this field is actually an array of this length. Note that charrays can have a length of zero only if at the end of a structure, implying there will be a buffer immediately following. No
divisor No If specified, the the value of this field is divided by this to obtain a (floating point) number of units. No
minval No The minimum valid value can be found in this field No
maxval No The maximum valid value can be found in this field No
clowval No The value below which caution should be exercised can be found in this field No
chighval No The value above which caution should be exercised can be found in this field No
units No What units (e.g. seconds, pounds, etc) is this field provided in? The units must exist in the param_units dictionary. No
interpret No If specified, interpret this field using the given Dictionary No
defrange No If specified, references a predefined range for interpretation of the value. No
3.1.1.2. uint8 - 8-bit unsigned integer
Table 3: uint8
Attribute Mandatory Definition Default
length No If specified, this field is actually an array of this length. Note that charrays can have a length of zero only if at the end of a structure, implying there will be a buffer immediately following. No
divisor No If specified, the the value of this field is divided by this to obtain a (floating point) number of units. No
minval No The minimum valid value can be found in this field No
maxval No The maximum valid value can be found in this field No
clowval No The value below which caution should be exercised can be found in this field No
chighval No The value above which caution should be exercised can be found in this field No
units No What units (e.g. seconds, pounds, etc) is this field provided in? The units must exist in the param_units dictionary. No
interpret No If specified, interpret this field using the given Dictionary No
defrange No If specified, references a predefined range for interpretation of the value. No
3.1.1.3. int16 - 16-bit two's complement signed integer
Table 4: int16
Attribute Mandatory Definition Default
length No If specified, this field is actually an array of this length. Note that charrays can have a length of zero only if at the end of a structure, implying there will be a buffer immediately following. No
divisor No If specified, the the value of this field is divided by this to obtain a (floating point) number of units. No
minval No The minimum valid value can be found in this field No
maxval No The maximum valid value can be found in this field No
clowval No The value below which caution should be exercised can be found in this field No
chighval No The value above which caution should be exercised can be found in this field No
units No What units (e.g. seconds, pounds, etc) is this field provided in? The units must exist in the param_units dictionary. No
interpret No If specified, interpret this field using the given Dictionary No
defrange No If specified, references a predefined range for interpretation of the value. No
3.1.1.4. uint16 - 16-bit unsigned integer
Table 5: uint16
Attribute Mandatory Definition Default
length No If specified, this field is actually an array of this length. Note that charrays can have a length of zero only if at the end of a structure, implying there will be a buffer immediately following. No
divisor No If specified, the the value of this field is divided by this to obtain a (floating point) number of units. No
minval No The minimum valid value can be found in this field No
maxval No The maximum valid value can be found in this field No
clowval No The value below which caution should be exercised can be found in this field No
chighval No The value above which caution should be exercised can be found in this field No
units No What units (e.g. seconds, pounds, etc) is this field provided in? The units must exist in the param_units dictionary. No
interpret No If specified, interpret this field using the given Dictionary No
defrange No If specified, references a predefined range for interpretation of the value. No
3.1.1.5. int32 - 32-bit two's complement signed integer
Table 6: int32
Attribute Mandatory Definition Default
length No If specified, this field is actually an array of this length. Note that charrays can have a length of zero only if at the end of a structure, implying there will be a buffer immediately following. No
divisor No If specified, the the value of this field is divided by this to obtain a (floating point) number of units. No
minval No The minimum valid value can be found in this field No
maxval No The maximum valid value can be found in this field No
clowval No The value below which caution should be exercised can be found in this field No
chighval No The value above which caution should be exercised can be found in this field No
units No What units (e.g. seconds, pounds, etc) is this field provided in? The units must exist in the param_units dictionary. No
interpret No If specified, interpret this field using the given Dictionary No
defrange No If specified, references a predefined range for interpretation of the value. No
3.1.1.6. uint32 - 32-bit unsigned integer
Table 7: uint32
Attribute Mandatory Definition Default
length No If specified, this field is actually an array of this length. Note that charrays can have a length of zero only if at the end of a structure, implying there will be a buffer immediately following. No
divisor No If specified, the the value of this field is divided by this to obtain a (floating point) number of units. No
minval No The minimum valid value can be found in this field No
maxval No The maximum valid value can be found in this field No
clowval No The value below which caution should be exercised can be found in this field No
chighval No The value above which caution should be exercised can be found in this field No
units No What units (e.g. seconds, pounds, etc) is this field provided in? The units must exist in the param_units dictionary. No
interpret No If specified, interpret this field using the given Dictionary No
defrange No If specified, references a predefined range for interpretation of the value. No
3.1.1.7. charray - 8-bit ISO-8859 encoded character string, NUL (0) terminated
Table 8: charray
Attribute Mandatory Definition Default
length Yes If specified, this field is actually an array of this length. Note that charrays can have a length of zero only if at the end of a structure, implying there will be a buffer immediately following. No
name Yes Mandatory name for this parameter format which may only contain lower case letters a-z, underscore ('_') and digits 0-9 after the first non-digit character. No
definition No Human readable description of the purpose of this item. No
3.1.1.8. struct - A previously defined structure
Table 9: struct
Attribute Mandatory Definition Default
struct Yes No
name Yes Mandatory name for this parameter format which may only contain lower case letters a-z, underscore ('_') and digits 0-9 after the first non-digit character. No
definition No Human readable description of the purpose of this item. No
3.1.1.9. starray - Array of another previously defined structure
Table 10: starray
Attribute Mandatory Definition Default
struct Yes If specified, references a predefined range for interpretation of the value. No
length Yes If specified, this field is actually an array of this length. Note that charrays can have a length of zero only if at the end of a structure, implying there will be a buffer immediately following. No
name Yes Mandatory name for this parameter format which may only contain lower case letters a-z, underscore ('_') and digits 0-9 after the first non-digit character. No
definition No Human readable description of the purpose of this item. No

3.1.2. paramformat

Table 11: paramformat
Attribute Mandatory Definition Default
value Yes This is the integer ID that is used to uniquely identify a parameter format No
bufferlen No For parameter formats which end in a charray of length zero, this is the maximum number of character bytes that any parameter could contain. No
minval No The minimum valid value can be found in this field No
maxval No The maximum valid value can be found in this field No
clowval No The value below which caution should be exercised can be found in this attribute No
chighval No The value below which caution should be exercised can be found in this attribute No
name Yes Mandatory name for this parameter format which may only contain lower case letters a-z, underscore ('_') and digits 0-9 after the first non-digit character. No
definition No Human readable description of the purpose of this item. No

3.2. dictionaries

3.2.1. dictionary

Table 12: dictionary
Attribute Mandatory Definition Default
default No If specified, use this name for any value that is not defined in the dictionary. If unspecified, "UNKNOWN" is used. UNKNOWN
emptyok No If set to "true", an empty string is considered an encoding of zero rather than an error and a zero value is an empty name unless zero is otherwise defined. false
issigned No If set to "true", all value fields for dictionary entries are considered to be 32-bit signed integers. Otherwise all dictionary entry values are considered 32-bit unsigned integers. false
mask No If defined, this integer is used as a default mask for the interpretation of non-flag values. No
numbersok No If set to true, bare numbers that do not have named values are permissible. FALSE
immutable No If set to true, this dictionary may not be modified by a future dictionary load. false
separator No If defined, this integer is used as a default mask for the interpretation of non-flag values. |
class No For dictionaries of message subclasses, this specifies the msgcl field from the msg_class dictionary for which this set of subclasses applies No
minval No The minimum valid value for the dictionary if set (otherwise all possible values of the underlying datatype are assumed valid). No
maxval No The minimum valid value for the dictionary if set (otherwise all possible values of the underlying datatype are assumed valid). No
type No Marked external to indicate that there is implementation needed to perform the translation. No
name Yes Mandatory name for this parameter format which may only contain lower case letters a-z, underscore ('_') and digits 0-9 after the first non-digit character. No
definition No Human readable description of the purpose of this item. No
3.2.1.1. entry
Table 13: entry
Attribute Mandatory Definition Default
value Yes Mandatory unique value in the form of a signed or unsigned 32-bit number which may be specified with an optional shift left and in parenthesis. No
format No Required for the db_param dictionary to indicate what the param_format of the parameter is. No
interpret No For the db_param if specified, interpret the given database parameter using the specified dictionary. No
units No For db_param if specified, the units of measure for the given database parameter No
divisor No For db_param if specified, the value should be divided by this number to determine the (floating point) number of units. No
flag No If specified with a value of "true", the value is treated as a flag that is combined with other values. Any value formed with a shift is assumed to be a flag by default. false
mask No If specified, this 32-bit mask is applied to the value before comparison with the given value. false
body No For Maintenance Messages specifies the `structure` associated with the body of this maintenance message. false
a661encoding No Used for ARINC-661 parameters in A661 dictionaries as a hint to how the data is encoded for ARINC-661. false
name Yes Mandatory name for this parameter format which may only contain lower case letters a-z, underscore ('_') and digits 0-9 after the first non-digit character. No
definition No Human readable description of the purpose of this item. No

3.3. ranges

3.3.1. range

Table 14: range
Attribute Mandatory Definition Default
minval Yes The minimum value for the range. No
maxval Yes The maximum value that the range can have. No
mindisp Yes The minimum value when displaying a value interpreted with the range versus the minimum value that the range can have. No
maxdisp Yes The maximum value when displaying a value interpreted with the range versus the maximum value that the range parameter can have. No
divisor No For a range the value to divide the ranged parameter by prior to interpreting the value. No
wrap No A Boolean flag where true indicates that values greater than the maxval of the range should wrap circularly starting at the minval of the range. No
numticks No How many subdivisions of the range there should be (i.e. the number of tick marks to make in a gauge). No
name Yes Mandatory name for this parameter format which may only contain lower case letters a-z, underscore ('_') and digits 0-9 after the first non-digit character. No
definition No Human readable description of the purpose of this item. No
3.3.1.1. tick
Table 15: tick
Attribute Mandatory Definition Default
color Yes The specific color to display at the specified value. No
value Yes The specific value at which a specified color should be displayed. No

3.4. params

3.4.1. param

Table 16: param
Attribute Mandatory Definition Default
value Yes This is the 21-bit identifier field that will be have the length in 11-bits prepended to form the total parameter identifier. No
format Yes What the parameter format special structure describes how to interpret the data. No
units No What units (i.e. lbs, degrees Fahrenheit, or Knots) the value is given in specified in a special param_units dictionary. No
defrange No The default range to be used to determine if the parameter is valid when examined. No
divisor No The divisor that is applied to the value of this parameter before it is sent as an XSEDE message. No
length No For variable length parameter formats, what the length of the variable portion is in Bytes. No
interpret No Default dictionary to be used to interpret the value of the parameter. No
range No Boolean value that is used to signal that a range parameter should be generated in conjunction with the default non-range parameter. No
unitnum No A human readable interpretation for what a unit number means for the parameter. For example, a parameter for the source of music in an airplane might explain the unit number is representative of which audio panel in the aircraft. No
subunitnum No A human readable interpretation for what a subunit number means for the parameter. For example, a parameter for the source of music in an airplane might explain the standard mapping of the subunit number to crew, passengers, or the audio panel as a whole. No
name Yes Mandatory name for this parameter format which may only contain lower case letters a-z, underscore ('_') and digits 0-9 after the first non-digit character. No
definition No Human readable description of the purpose of this item. No

4. Message Format

4.1. Message Header 



                        1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |    src id                     |    message number             |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |   msg class   | message ID    |       flags                   |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |              tcid             |          len                  |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                                                               |
      ...
   :                             Data                              :
      ...
   |                                                               |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 1: Message Header Format

XSEDE messages are formatted as shown in the above diagram and consist of the following fields:

src id:
UINT16; locally configured source ID. Must be unique on network.
message number:
UINT16; monotonically increasing message number.
msg class:
UINT8; The message class. See Table 17
message ID:
UINT8; msg-op; See Table 19.
flags:
UINT16; See Table 21.
tcid:
t-NONE; See Table 22.
len:
UINT16 ; length of all parameters or raw data in octets. Note: Operational and Maintenance class messages shall always have a length that is a factor or 4.
data:
1*(parameter) / *(OCTET) ; raw data may be arbitrary length sequence of octets.

4.1.1. Message Header Dictionaries

This section defines the dictionaries used in the message header. See Section 4.1.

Table 17, below, shows the values defined in the msg-class Dictionary. These options represent the XFS common data bus message classes.

Table 17: msg-class Dictionary
Name Value Definition
MAINT %d2 Maintenance Message
OP %d3 Operational Message
RAW %d4 Access to raw data stream (e.g. RS-232, RS-485, ARINC-429, etc)

Table 18, below, shows the values defined in the msg-maint Dictionary. These options represent the Message subclasses for maintenance message class.

Table 18: msg-maint Dictionary
Name Value Definition
MXREQ %d1 Request maintenance mode for a specific CPU (or all if cpu is empty)
MXCHAL %d2 Authentication challenge
MXAUTH %d3 Authentication response
MXACCEPT %d4 Accept authentication request
MXDENY %d5 Deny maintenance mode
MXREADY %d6 Ready for update or diagnostic
DOUPDATE %d7 User Requests System Update. Note CPU is requestor
UPDREQ %d8 Request Update for given Device
UPDSTAT %d9 Status of Update
DODIAG %d10 User Requests System Update. Note CPU is requestor. Salt is type of diagnostic.
DIAGREQ %d11 Request diagnostic for given Device.
DIAGSTAT %d12 Status of Update

Table 19, below, shows the values defined in the msg-op Dictionary. These options represent the Message subclasses for operational message class.

Table 19: msg-op Dictionary
Name Value Definition
SUBFLDATA %d1 Subscribe to Aircraft Flight Data Params
FLIGHTDATA %d2 Flight Data Info
DEVSTATUS %d3 Device Status
GDL90 %d4 GDL-90 Format Messages without framing, FCS or escape characters
SUBMSGCLID %d5 Subscribe to Specific Message Class and ID

Table 20, below, shows the values defined in the msg-raw Dictionary. These options represent the Message subclasses for raw message class.

Table 20: msg-raw Dictionary
Name Value Definition
SERIALRX %d1 Serial raw data stream receive from end device
SERIALTX %d2 Serial raw data stream transmit to end device
SPIRX %d5 Raw SPI bus receive from end device
SPITX %d6 Raw SPI bus transmit to end device
ARINC429RX %d7 Raw ARINC-429 bus receive from end device
ARINC429TX %d8 Raw ARINC-429 bus transmit to end device
MIL1553RX %d9 Raw MIL-STD-1553 received from end device
MIL1553TX %d10 Raw MIL-STD-1553 bus transmit to end device
ECBRX %d11 Raw XFS ECB control receive from end device
ECBTX %d12 Raw XFS ECB control transmit to end device
GPIORX %d13 Raw XFS ECB control receive from end device
GPIOTX %d14 Raw XFS ECB control transmit to end device
ADCRX %d15 Analog/Digital Converter receive from end device
DACTX %d16 Digital/Analog Converter transmit to end device
CANBUSRX %d17 Raw CAN bus receive from end device
CANBUSTX %d18 Raw CAN bus transmit to end device
DATAGRAMRX %d19 Raw Datagram receive from end device
DATAGRAMTX %d20 Raw Datagram transmit to end device

Table 21, below, shows the values defined in the msg-flag-cert Dictionary. These options represent the Message and parameter certification level tracking.

Table 21: msg-flag-cert Dictionary
Name Value Definition
EXPERIMENTAL %d0 Experimental
LEVEL-E %d1 DO-178 Level E
LEVEL-D %d2 DO-178 Level D
LEVEL-C %d3 DO-178 Level C
LEVEL-B %d4 DO-178 Level B
LEVEL-A %d5 DO-178 Level A

Table 22, below, shows the values defined in the tcid Dictionary. These options represent the XFS transcoder ID values.

Table 22: tcid Dictionary
Name Value Definition
NONE %d0 No transcoder ID is required or asserted
DEFAULT %d65536 Pseudo-value to represent global default

4.2. Message Parameter Format

The section defines the elements common to all XSEDE parameters.



                        1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |             Unit              |           SubUnit             |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |  Parameter Data Len |                Ident                    |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |     Format    |  Confidence   |   Expire   |      Pflags      |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                                                               |
      ...
   :                  Parameter   Data                             :
      ...
   |                                                               |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 2: Message Parameter Format
Unit:
UINT16 If appropriate, which unit this parameter applies (e.g., Engine #1).
SubUnit:
UINT16; If appropriate, which subunit this parameter applies (e.g., Engine #2, Cylinder #3).
Parameter Ident:

UINT32; This attribute is the composite of the length and a parameter specific identifier.

Nodes MUST compare this value as a whole to their known parameters; that it to say, an Ident with a different length is a different parameter. This same Ident with a different length situation commonly occurs when sending range parameters but it also can happen when parameter definitions are updated.

If the combined value does not match a known parameter/length pair, the parameter data length MUST be determined, then padded to a multiple of four, and the parameter MUST be ignored.

Len:
11 bits; Parameter Data Length in octets. This value MUST reflect the usable length of the parameter data, not including padding, however, the parameter itself MUST be padded to a length that is a multiple of four octets to maintain proper word alignment.
Ident:
21 bits; XSEDE Parameter Identifier. See Section 4.7.
Format:
param_format (OCTET): Format of Parameter Data. See Section 4.3.
Confidence:
param_confidence (OCTET): Confidence of data element. See Table 23.
Expire:
OCTET; Time to live. %x00 to not expire. See Section 4.2.2 for encoding.
Pflags:
msg_flag_cert(OCTET) Reserved Flags, bottom three bits are certification level of data. See Table 21
Parameter Data:
*(OCTET) quadword padded payload.

4.2.1. Parameter Header Dictionaries

Table 23, below, shows the values defined in the param-confidence Dictionary. These options represent the XFS common bus parameter format confidence levels.

Table 23: param-confidence Dictionary
Name Value Definition
HIGH %d100 Confirmed known value
USERSEL %d90 User selected value at runtime
SYSSEL %d80 System selected value at runtime
UNANIMOUS %d50 Redundant data available and is rationalized
RATIONAL %d40 Data being rationalized from other data sources with normal sources ignored
VOTED %d30 Data is redundantly verified from identical instruments
SMOOTHED %d20 Smoothed/filtered version of raw data
RAW %d10 Raw, unchecked data
ESTIMATE %d5 Rough estimation
USELESS %d0 Value is missing or expected invalid and supplied for debugging ONLY

The msg_flag_cert Dictionary is also used. See Table 21 for its definition.

4.2.2. Expire Encoding

Information provided in messages have a limited usability lifetime or time-to-live. The Expire field is used to indicate how long the associated parameter is valid. It is an eight-bit field that is split into an exponent and mantissa to provide the maximum range and precision within this small space. The upper four bits represent the the mantissa and the lower four bits represent the exponent. If the value of the Expire field is %x00, the value MUST be interpreted to mean "the parameter does not expire," otherwise the expiry time value MUST be determined by the following formula:

Expiration (milliseconds) = (16 + M) * 2^E which can be implemented with ( 0x10 | M ) << E

This approach give us the range of 17 to 1015880 milliseconds (about 17 minutes) with 0x00 reserved as "No Expiration."



    0
    0 1 2 3 4 5 6 7
   +-+-+-+-+-+-+-+-+
   |   E   |   M   |
   +-+-+-+-+-+-+-+-+
Figure 3: Message Parameter Format

For example, an expiry value of %x31 gives a mantissa of 0001 and an exponent of 0011 yielding a value of (16 + 1) * 2^E ms or 128 milliseconds.

Another example, a value of %x7F which decomposes to a mantissa of 1111 and an exponent of 0111 yielding a value of (16 + 15) * 2^7 ms, or 3968 milliseconds.

The minimum value of %x01 which decomposes to a mantissa of 0001 and an exponent of 0000 yielding a value of (16 + 1) * 2^0 ms, or 17 milliseconds.

The maximum value of %xFF which decomposes to a mantissa of 1111 and an exponent of 1111 yielding a value of (16 + 15) * 2^15 ms, or 1015808 milliseconds, which is about 17 minutes.

A final example, %x00 which is a special case for "No Expiration."

4.3. Parameter Attribute Formats

The various attributes associated with parameters occur as both simple types, such as Integers and compound structures, such as Waypoints. This section defines the attribute formats that are used in XSEDE.

4.3.1. BOOL Parameter Format

Boolean Format

Parameter Identifier: %d1

Length: 4

Structure:

Table 24: BOOL Parameter Format
Item Type Description
bool-value boolean Zero for false, 1 for true, all others undefined

Table 25, below, shows the values defined in the boolean Dictionary. These options represent the Nominal boolean values.

Table 25: boolean Dictionary
Name Value Definition
FALSE %d0 False
TRUE %d1 True

4.3.2. UINT Parameter Format

Unsigned 32-bit Integer Format

Parameter Identifier: %d2

Length: 4

Structure:

Table 26: UINT Parameter Format
Item Type Description
uint-value uint32 32-bit Unsigned Value

4.3.3. WAYPOINT Parameter Format

Waypoint on a Flight Plan

Parameter Identifier: %d3

Length: 80

Structure:

Table 27: WAYPOINT Parameter Format
Item Type Description
label 12*12(OCTET) Name of waypoint
lat int32 Latitude of waypoint * 10,000,000
lon int32 Longitude of waypoint * 10,000,000
lonlen int32 Length of degree of longitude for this lattitude in meters
alt int32 Altitude associated with waypoint in 0.1ft
minalt int32 Logical Minimum for Fix Crossing in 0.1ft
maxalt int32 Logical Maximum Altitude for Fix Crossing in 0.1ft
speed int32 Target indicated airspeed
magadj uint32 Original (VOR) or Current (GPS) Magnetic Deviation in 0.01 degrees of NAVAID
inbound uint16 Inbound course in 0.01 degrees
outbound uint16 Outbound course in 0.01 degrees
freq uint32 Frequency if this is a NAV AID
wtype fms-waypoint Type of waypoint
ctype fms-container Type of container
flags fms-flag Flags for the waypoint / leg
cumete uint32 Cumulative ETE from active waypoint in 0.01 seconds
cumdis uint32 Cumulative distance from active waypoint in 0.001 nm
container 16*16(OCTET) What container is this waypoint a part of (e.g. V431, ILS-18L, etc)

Table 28, below, shows the values defined in the fms-waypoint Dictionary. These options represent the Flight management system waypoint types.

Table 28: fms-waypoint Dictionary
Name Value Definition
UNKNOWN %d0 Unknown or unspecified
GS %x80 Glideslope component
DME %x40 DME Component
TACAN %x20 TACAN Component
VOR %d1 VOR Component
LOC %d2 Localizer component
NDB %d3 NDB component
LDA %d4 LDA Component
SDF %d5 SDF Component
FIX %d6 Generic RNAV Fix
ILS %d7 Complete ILS system
AIRPORT %d8 An Airport
DIRECTFROM %d9 Starting point of a direct to
WEATHER %d10 Weather reporting station only

Table 29, below, shows the values defined in the fms-container Dictionary. These options represent the Flight management system container types.

Table 29: fms-container Dictionary
Name Value Definition
UNKNOWN %d0 Unspecified or unknown container
NONE %d1 No container
VICTOR %d2 VOR Airway
JET %d3 Jet Airway
AMBER %d4 Amber Airway
BLUE %d5 Blue Airway
GREEN %d6 Green Airway
RED %d7 Red Airway
Q %d8 RNAV Q Routes
T %d9 RNAV T Routes
STAR %d10 Standard Arrival Procedure
DP %d11 Standard Departure Procedure
APP %d12 Instrument Approach
RWY %d13 Airport Runway Surface Selection

Table 30, below, shows the values defined in the fms-flag Dictionary. These options represent the Flight management system waypoint and leg flags.

Table 30: fms-flag Dictionary
Name Value Definition
NONE %d0 No flags or leg type known
LEGTYPE-VA %d1 Heading to Altitude
LEGTYPE-VD %d2 Heading to DME Distance
LEGTYPE-VI %d3 Heading to Next Leg Intercept
LEGTYPE-VM %d4 Heading to Manual Termination
LEGTYPE-VR %d5 Heading to Radial Termination
LEGTYPE-CA %d6 Course to an Altitude
LEGTYPE-CD %d7 Course to a DME Distance
LEGTYPE-CI %d8 Course to Next Leg Intercept
LEGTYPE-CR %d9 Course to Radial Termination
LEGTYPE-CF %d10 Course to a Fix
LEGTYPE-TF %d11 Tracking Between Two Fixes
LEGTYPE-DF %d12 Direct to a Fix
LEGTYPE-FA %d13 Course from a Fix to an Altitude
LEGTYPE-FC %d14 Course from a Fix to an Along Track Distance
LEGTYPE-FD %d15 Course from a Fix to a DME Distance
LEGTYPE-FM %d16 Course from a Fix to a Manual Termination
LEGTYPE-AF %d17 Constant DMA Arc to a Fix
LEGTYPE-HF %d18 Hold to a Fix
LEGTYPE-HA %d19 Hold to an Altitude
LEGTYPE-HM %d20 Hold to a Manual Termination
LEGTYPE-IF %d21 Initial Fix
LEGTYPE-PI %d22 Procedure Turn to Intercept
LEGTYPE-RF %d23 Radius to a Fix
LEGTYPE-MASK %xff Mask with which to retrieve leg type
FLYOVER %x01.00 If not present, fly by
DISC %x02.00 If present, Discontinuity before current waypoint
ACTIVE %x04.00 If present, this is the active waypoint
OBS %x08.00 If present, waypoint allows OBS to be set
FAF %x10.00 If present, waypoint is final approach fix or after
SUSPEND %x20.00 FMS sequencing is suspended at this waypoint
LAST %x40.00 This waypoint is the last one in the flight plan

4.3.4. STRING Parameter Format

String of characters (may not have NULL termination)

Parameter Identifier: %d4

Length: length(data) + 0

Structure:

Table 31: STRING Parameter Format
Item Type Description
string-value *(OCTET) Optionally NUL terminated ISO-8559-1 String

4.3.5. CASMSG Parameter Format

CAS Message

Parameter Identifier: %d5

Length: length(data) + 4

Structure:

Table 32: CASMSG Parameter Format
Item Type Description
level cas-msglvl CAS level
rsvd uint8 Reserved, set to 0
flags cas-msgflag CAS related flags
label *(OCTET) Label for CAS Message

Table 33, below, shows the values defined in the cas-msglvl Dictionary. These options represent the Message levels for CAS messages and checklist items.

Table 33: cas-msglvl Dictionary
Name Value Definition
CLEAR %d0 Clear a previously issued CAS message -- issue from system only
DEBUG %d1 In-system debugging output only
LOG %d2 Log to system log, but do not display
MAINT %d3 Display only for maintenance purposes
STATUS %d4 Aircraft system status only
ADVISORY %d5 Advisory, flight crew should be aware, may require later crew response
CAUTION %d6 Caution, requires immediate flight crew awareness and later response
WARNING %d7 Warning, requires immediate awareness and response.
COMMENT %d10 Checklist Comment Associated with Previous Item
UNCHKITEM %d11 Unchecked Checklist Item
CHKITEM %d12 Checked Checklist Item
CHKBRANCH %d13 Checklist Branch Choice
PASS %d14 Built-in Test (BIT) Item passed
INPROG %d15 Built-in Test (BIT) Item in progress
NOTREQST %d16 Built-in Test (BIT) Item not yet requested
INCOMPLT %d17 Built-in Test (BIT) Item test did not complete
FAIL %d18 Built-in Test (BIT) Item failed

Table 34, below, shows the values defined in the cas-msgflag Dictionary. These options represent the Additional flags associated with CAS messages.

Table 34: cas-msgflag Dictionary
Name Value Definition
NONE %d0 No additional flags
AUTO %x01 Item is automatically checked/unchecked or the test is automatically executed

4.3.6. NULL Parameter Format

NULL format

Parameter Identifier: %d7

4.3.7. SINT Parameter Format

Signed 32-bit Integer Format

Parameter Identifier: %d9

Length: 4

Structure:

Table 35: SINT Parameter Format
Item Type Description
sint-value int32 Signed 32-bit two's complement value

4.3.8. BUS Parameter Format

Bus and Electronic Circuit Breaker Format

Parameter Identifier: %d10

Length: length(data) + 24

Structure:

Table 36: BUS Parameter Format
Item Type Description
state ecb-state State of Bus (in terms of ECB)
ecbflags ecb-flag Flags regarding ECB state
involts int16 Input Volts on Bus
drawamps int16 Current draw on bus
maxamps int16 Max Amps on bus
champs int16 Caution high amps
clamps int16 Caution low amps
minamps int16 Minimum amps on bus (could be -)
outvolts int16 Output Volts on Bus
maxvolts int16 Max volts
chvolts int16 Caution high voltage
clvolts int16 Caution low voltage
minvolts int16 Minimum low voltage
label *(OCTET) Label for BUS Message (System/Item)

Table 37, below, shows the values defined in the ecb-state Dictionary. These options represent the Electronic circuit breaker status.

Table 37: ecb-state Dictionary
Name Value Definition
UNKNOWN %d0 Circuit is in an unknown condition
OFF %d1 Circuit is turned off
ON %d2 Circuit is turned on
UNDERCUR %d3 Circuit is on, <100ma current drawn
RESET %d4 Request Reset
FORWARD %d5 ECB is active logical FWD direction
REVERSE %d6 ECB is active logical REV direction
TARGET %d7 ECB is set by target, not ON/OFF
BRAKELOW %d8 ECB is set by target, not ON/OFF
SHORTED %d128 Short Circuit
OVERCUR %d129 Overcurrent (but not short circuit)
OVERVOL %d130 Overvoltage situation
DISABLED %d131 Disabled by state-fault
RUNAWAY %d132 Disabled due to runaway (trim/flaps)
COLLARED %d133 Should not reset in flight
JAMMED %d134 Mechanical Jam detected
PULLED %d135 Pulled
BACKFLOW %d136 Disabled due to reverse current flow

Table 38, below, shows the values defined in the ecb-flag Dictionary. These options represent the Electronic circuit breaker parameter flags.

Table 38: ecb-flag Dictionary
Name Value Definition
INPUTVOLTS %x01 Input Volts field is valid

4.3.9. RANGE Parameter Format

Range description format

Parameter Identifier: %d11

Length: 36

Structure:

Table 39: RANGE Parameter Format
Item Type Description
numticks uint16 How many ticks are there
dispunits param-units Specifier for units for display
minval int32 Minimum valid value
maxval int32 Maximum valid value
mindisp int32 Where display starts (values lower than this are clipped)
maxdisp int32 Where display stops (values higher tha this are clipped)
ticks starray Actual tick data

Table 40, below, shows the values defined in the param-units Dictionary. These options represent the Units for the encoding and translation of XFS parameters.

Table 40: param-units Dictionary
Name Value Definition
UNSPEC %x00 Units not specified
INHG %x00.01 Use inches of Hg for BARO/MANPRES
FT %x00.02 Use feet for altitude
NM %x00.03 Use nautical miles for distance
C %x00.04 Use celcius for temperature
LBFT %x00.05 Use pound-feet for torque
S %x00.06 Use seconds for time
A %x00.07 Use amps for current
V %x00.08 Use volts for voltage
LB %x00.09 Use pounds for weight
IN %x00.0a Use inches for distance
FPM %x00.0b Use feet per minute for rate of climb/descent
LBPH %x00.0c Pounds per Hour for fuel flow
DEGPS %x00.0d Degrees per second for attitude change
DEG %x00.0e Degrees for attitude
G %x00.0f G force for load
RGBA %x00.10 8888 RGBA Value
MHZ %x00.11 Megahertz for Frequency
PCENT %x00.12 Percent of Maximum
KT %x00.13 Knots for Speed
NMPLB %x00.14 Nautical Miles per Pound
KTPS %x00.15 Knots per second
MACH %x00.16 Speed of sound
CPM %x00.17 Count per minute
PPM %x00.18 Parts per million
LPM %x00.19 Liters Per Minute
KW %x00.1a Kilowatt
AH %x00.1b Amp Hour
GAL %x00.1c Gallons of volume
NMPGAL %x00.1d Nautical Miles per Gallon
GPH %x00.1e Gallons per Hour for fuel flow
MEMS %x00.1f Mantissa/Exponent Milliseconds (2^E)*(M+16)
HPA %x80.01 Use Hecto pascals for BARO
M %x80.02 Use meters for altitude
SM %x80.03 Use statute miles for distance
F %x80.04 Use fahrenheit for temperature
NWM %x80.05 Use Newton Meters for torque
PSI %x80.06 Use PSI for MANPRES
MPH %x80.07 Use miles per hour for speed
SMPLB %x80.08 Statute Miles per Pound
MIN %x80.09 Minutes
HR %x80.0a Hours
HP %x80.0b Use Horsepower for power
KG %x80.0c Use kilograms at earth gravity for weight
L %x80.1c Liters of volume
LPH %x00.1e Liters per Hour for fuel flow
UL %xff.ff Unitless

4.3.10. GPIO Parameter Format

GPIO summary format

Parameter Identifier: %d12

Length: 12

Structure:

Table 41: GPIO Parameter Format
Item Type Description
features uint32 4-bit Feature (XFS_GPIO_FEATURE_*) x 8
outmodes uint32 4-bit Output modes (XFS_GPIO_OUTPUT_*) x 8
inmodes uint16 2-bit Input modes (XFS_GPIO_INPUT_*) x 8
flags uint16 Reserved for future use

4.3.11. APP Parameter Format

APP status format

Parameter Identifier: %d13

Length: length(data) + 52

Structure:

Table 42: APP Parameter Format
Item Type Description
state scb-state State of application*
rsvd uint8 Reserved bits
appflags scb-flag Flags regarding app
avgcpu uint16 Average OS CPU time utilization (of allocated amount) over last second (0=unknown, 1=minimal, 65535=all)
hwcpu uint16 High water OS CPU time utilization (of allocated amount, 0=unknown, 1=minimal, 65535=all)
stackused uint16 Portion of stack used (0=unknown, 1=minimal, 65535=all)
heapused uint16 Portion of heap used (0=unknown, 1=minimal, 65535=all)
netused uint16 Portion of network used (0=unknown, 1=minimal, 65535=all)
otherused uint16 Worst case portion of any other limited resources (0=unknown, 1=minimal, 65535=all)
ivcsw uint32 Involuntary context switches
aircraftid 16*16(OCTET) Aircraft Identifier
swrev 16*16(OCTET) Software Version Identifier
label *(OCTET) Name of APP

Table 43, below, shows the values defined in the scb-state Dictionary. These options represent the Software circuit breaker states.

Table 43: scb-state Dictionary
Name Value Definition
UNKNOWN %d0 State of software is unknown
STARTING %d1 Application is in startup phase
RUNNING %d2 Application is running
STOPPING %d3 Stopping has been requested
RESTART %d4 Restart Application (PULL + RESET + START)
RESET %d5 Allow application to be started
HUNG %d6 Application is running but is no longer responsive
DEGRADED %d127 Application is running in a degraded mode
STOPPED %d128 Application is stopped
STARTFAIL %d129 Application failed startup
RUNAWAY %d130 Application has a runaway loop
OVERCPU %d131 Application is using excessive CPU while in RUNNING state
OVERMEM %d132 Application terminated due to memory overrun
EXCEPTION %d133 Application terminated due to runtime exception
ENDED %d134 Application ended without error or request
ENDERROR %d135 Application ended with error condition
PULLED %d136 Application should not be allowed to run until reset
COLLARED %d137 Should not reset in flight

Table 44, below, shows the values defined in the scb-flag Dictionary. These options represent the Software Circuit Breaker Flags.

Table 44: scb-flag Dictionary
Name Value Definition
NONE %d0 Application running within normal paramters
HIGHMEM %x01 Application has used unexpectedly high portion of memory
HIGHCPU %x02 Application has used unexpectedly high portion of CPU
HIGHBW %x04 Application has used unexpectedly high portion of network bandwidth

4.3.12. UPDATE Parameter Format

Aircraft Update Progress

Parameter Identifier: %d15

Length: length(data) + 56

Structure:

Table 45: UPDATE Parameter Format
Item Type Description
aircraftid 16*16(OCTET) Aircraft Identifier
progress uint32 Progress
progflags msg-cmd-updstat-flag Progress Flags
activity 32*32(OCTET) Description of current activity
label *(OCTET) Name of CPU being updated

Table 46, below, shows the values defined in the msg-cmd-updstat-flag Dictionary. These options represent the Maintenance mode status update flags.

Table 46: msg-cmd-updstat-flag Dictionary
Name Value Definition
SUCCESS %x01 Update is complete and successful
ERROR %x02 Error during update

4.3.13. SERVO Parameter Format

Position with flags to interpret whether servo should be engaged, disengaged or left alone and whether active

Parameter Identifier: %d16

Length: 8

Structure:

Table 47: SERVO Parameter Format
Item Type Description
servopos int32 None
servomode afcs-servo None

Table 48, below, shows the values defined in the afcs-servo Dictionary. These options represent the Servo engagement flags.

Table 48: afcs-servo Dictionary
Name Value Definition
ENGAGE %x80.00.00.00 If present in engagement request, along with 'ENGAGED' value, set engagment status
ENGAGED %d1 For requests, retain current engagement state, for status, present if currently engaged
DISENGAGED %d0 If engaged, disengage and for status, currently disengaged

4.3.14. DBASE Parameter Format

Database Information

Parameter Identifier: %d17

Length: 92

Structure:

Table 49: DBASE Parameter Format
Item Type Description
crc uint32 32-bit CRC of database file
name 16*16(OCTET) Name of database (e.g. com)
supplier 16*16(OCTET) Who supplied the database
region 16*16(OCTET) What region is the data valid for
cycle 16*16(OCTET) What cycle
valid 12*12(OCTET) What data begins data validity YYYY-MM-DD
expires 12*12(OCTET) After which data is data expired YYYY-MM-DD

4.4. Native Structures

4.4.1. Structures

This section defines the default structures that are used for translating between XSEDE and other protocol interfaces.

4.4.1.1. config-entry-hdr Range Default
  • rlen(2 bytes): Record Length
  • flags(2 bytes): Record Flags
  • dtype(2 bytes): Data Type
  • data(variable-size bytes): Storage of actual data
4.4.1.2. msg-cmd-mxreq Range Default
  • cpu(32 bytes): CPU for which maintenance mode is being requested
  • aircraftid(16 bytes): Aircraft ID for which MX mode is being requested
4.4.1.3. msg-cmd-updreq Range Default
  • cpu(32 bytes): CPU for which maintenance mode is being requested
  • aircraftid(16 bytes): Aircraft ID for which MX mode is being requested
  • tftpserver(4 bytes): TFTP Server IP Address
4.4.1.4. msg-cmd-diagreq Range Default
  • cpu(32 bytes): CPU for which maintenance mode is being requested
  • aircraftid(16 bytes): Aircraft ID for which MX mode is being requested
  • tftpserver(4 bytes): TFTP Server IP Address for results
  • diag(32 bytes): Requested Diagnostic Name
4.4.1.5. msg-cmd-mxchal Range Default
  • cpu(32 bytes): CPU for which maintenance mode authentication is being requested
  • aircraftid(16 bytes): Aircraft ID for which MX mode is being requested
  • salt(32 bytes): Salt which must be signed
4.4.1.6. msg-cmd-mxauth Range Default
  • cpu(32 bytes): CPU for which maintenance mode authentication is being requested
  • aircraftid(16 bytes): Aircraft ID for which MX mode is being requested
  • salt(32 bytes): Salt which must be signed
  • sig(64 bytes): Signed SHA1 signature of cpu ^ salt ^ aircraftid
4.4.1.7. msg-cmd-updstat Range Default
  • cpu(32 bytes): CPU for which maintenance mode is being requested
  • aircraftid(16 bytes): Aircraft ID for which MX mode is being requested
  • activity(32 bytes): Description of current activity
  • progress(4 bytes): Progress in 1/1000 of one percent
  • progflags(4 bytes): Flags for progress status
4.4.1.8. msg-sub-msg Range Default
  • mclass(1 bytes): Message Class
  • mclid(1 bytes): Class Specific Message ID (or 0 for any message id for the given class)
  • rsvd(2 bytes): Reserved for future use
4.4.1.9. suip-frame Range Default
  • cmd(2 bytes): Command
  • addr(2 bytes): Peripheral Address
  • data(variable-size bytes): Data
4.4.1.10. cantun-rxdata Range Default
  • seqno(2 bytes): None
  • data(1 bytes): None
4.4.1.12. cantun-rxstatus Range Default
  • rxseqno(2 bytes): Last Received sequence number (0-16383), if high bit is 1, message is from perspective of CPU
  • txseqno(2 bytes): Next to transmit sequence number (0-16383)
  • lastrx(2 bytes): Time since last received message (0-65535)
  • rxmiss(2 bytes): Count of sequence mismatches (0-65535)
4.4.1.13. cantun-txdata Range Default
  • seqno(2 bytes): When transmitting, the top two bits are reserved for beginning and end bits to be sure whole messages are transferred
  • data(1 bytes): None
4.4.1.14. cantun-txflags-health Range Default
  • seqno(2 bytes): None
  • status(1 bytes): Aircraft Status
  • data(1 bytes): None
4.4.1.15. cantun-rxflags-health Range Default
  • seqno(2 bytes): None
  • volts(2 bytes): Input Voltage
  • temp(1 bytes): Temperature in degrees C relative to -80C
4.4.1.16. cantun-rxflags-ecb Range Default
  • seqno(2 bytes): None
  • volts(2 bytes): Volts on Bus in 0.1 volts
  • drawamps(2 bytes): Current draw in 0.1 amps on bus
  • state(1 bytes): Current state of ECB
  • flags(1 bytes): Flags on ECB
4.4.1.17. cantun-rxstatus-ecb Range Default
  • nominalamps(2 bytes): Nominal Max Current draw in 0.1 amps on bus
  • hardamps(2 bytes): Absolute Max Current draw in 0.1 amps on bus
  • nominalrevamps(2 bytes): Nominal reverse max amps
  • hardrevamps(2 bytes): Nominal reverse max amps
4.4.1.18. cantun-txflags-ecb Range Default
  • seqno(2 bytes): None
  • nominalmaxamps(2 bytes): Nominal max amps
  • hardmaxamps(2 bytes): Hard maximum Amps
  • state(1 bytes): State
  • flags(1 bytes): None
4.4.1.19. cantun-txdata-ecb Range Default
  • seqno(2 bytes): None
  • posreq(2 bytes): Requested position (0-1000) top 6 bits reserved
4.4.1.20. cantun-rxdata-ecb Range Default
  • seqno(2 bytes): None
  • posreq(2 bytes): Currently requested position (0-1000) top 6 bits reserved
  • posact(2 bytes): Actual current position (0-1000) top 6 bits reserved
4.4.1.21. cantun-rxflags-gpio Range Default
  • seqno(2 bytes): None
  • inputmodes(2 bytes): Detected input modes (XFS_GPIO_INPUT_*) (8 total)
  • outputmodes(4 bytes): Each port output mode (XFS_GPIO_OUTPUT_*) (8 total)
4.4.1.22. cantun-txflags-gpio Range Default
  • seqno(2 bytes): None
  • isanalog(1 bytes): Which ports we wish to receive analog values?
  • isreset(1 bytes): Which ports should have faults reset
  • outputmodes(4 bytes): Each port output mode (8 total)
4.4.1.23. cantun-rxdata-gpio Range Default
  • seqno(2 bytes): None
  • rxdata(2 bytes): Recieved data - Bit 15 if last entry, bits 14-12 are pin # (0-7), bits 0-11 are value 0-4095, up to 3 entries
4.4.1.24. cantun-txdata-gpio Range Default
  • seqno(2 bytes): None
  • txdata(2 bytes): Transmitted PWM/DAC value - Bit 15 reserved, bits 14-12 are pin # (0-7), bits 0-11 are value 0-4095, up to 3 entries
4.4.1.25. cantun-rxdata-ar429 Range Default
  • seqno(2 bytes): None
  • flags(2 bytes): Reserved
  • arinc429(4 bytes): ARINC 429 Word
4.4.1.26. cantun-txdata-ar429 Range Default
  • seqno(2 bytes): None
  • flags(2 bytes): Reserved
  • arinc429(4 bytes): ARINC 429 Word
4.4.1.27. cantun-rxflags-config Range Default
  • seqno(2 bytes): None
  • cmd(1 bytes): None
  • flags(1 bytes): None
  • moduleid(4 bytes): Globally unique module ID
4.4.1.28. cantun-txflags-config Range Default
  • seqno(2 bytes): None
  • cmd(1 bytes): None
  • flags(1 bytes): None
  • moduleid(4 bytes): Globally unique module ID
4.4.1.29. cantun-txdata-config Range Default
  • seqno(2 bytes): None
  • data(6 bytes): For Console, commands to be issued to device. For Flash, actual flash data
4.4.1.30. cantun-rxdata-config Range Default
  • seqno(2 bytes): None
  • data(6 bytes): For Console, output from device. For Flash, acknowledge receipt by seqno
4.4.1.31. ethertun-can Range Default
  • canid(4 bytes): CAN ID and related fields
  • dlc(1 bytes): Length of data (0-8 bytes)
  • srcbus(1 bytes): Globally Unique Source Bus Number
  • seqno(2 bytes): Sequence Number 0 - 0x3fff
  • data(8 bytes): Encapsulated CAN data
4.4.1.32. ethertun-arinc429 Range Default
  • srcbus(1 bytes): Globally Unique Source Bus Number
  • flags(1 bytes): Flags reserved for future use
  • seqno(2 bytes): Sequence Number
  • words(4 bytes): Encapsulated ARINC429 data
4.4.1.33. ethertun-serial Range Default
  • srcbus(1 bytes): Globally Unique Source Serial Bus Number
  • flags(1 bytes): Flags reserved for future use
  • seqno(2 bytes): Sequence Number 0 - 0x3fff
  • data(variable-size bytes): Encapsulated Serial data
4.4.1.34. ethertun-gpio Range Default
  • seqno(2 bytes): Sequence number unique to source IP/PORT combo
  • pinno(1 bytes): Pin Number
  • outmode(1 bytes): Output modes (XFS_GPIO_OUTPUT_*)
  • value(4 bytes): Analog or digital value
4.4.1.35. ethertun-ts-can Range Default
  • canid(4 bytes): CAN ID and related fields
  • dlc(1 bytes): Length of data (0-8 bytes)
  • srcbus(1 bytes): Globally Unique Source Bus Number
  • seqno(2 bytes): Sequence Number
  • origts(4 bytes): Original Relative Timestamp
  • data(8 bytes): Encapsulated CAN data
4.4.1.36. milstd1553-etherhdr Range Default
  • flags(2 bytes): Reserved for flags
  • seqno(2 bytes): Sequence number of 14 bits
4.4.1.37. milstd1553-hdr Range Default
  • flags(2 bytes): Frame Flags
  • modecode(1 bytes): Class of message transaction
  • wordcount(1 bytes): Number of actual words (0-32)
  • rtaddr1(1 bytes): Remote Terminal Address (first cmd)
  • subaddr1(1 bytes): Remote Terminal Function Subaddress (first cmd)
  • status1(2 bytes): Remote Terminal Status (first cmd)
  • rtaddr2(1 bytes): Remote Terminal Address (second cmd)
  • subaddr2(1 bytes): Remote Terminal Function Subaddress (second cmd)
  • status2(2 bytes): Remote Terminal Status (second cmd)
  • data(2 bytes): 0-32 words of data
4.4.1.38. msg Range Default
  • srcaddr(2 bytes): Identifier of transmitting source, typically computer ID in upper 8 bits and microservice ID in lower 8 bits
  • mseqno(2 bytes): Sequence number of message.
  • mclass(1 bytes): Message Class
  • mclid(1 bytes): Message ID
  • flags(2 bytes): Message flags, bottom 3 bits reserved for cert level
  • tcid(2 bytes): If multiple pathways exist for identical data, which pathway are we
  • len(2 bytes): Length of message in bytes -- note that it could be shorter than available data due to alignment issues
  • data(variable-size bytes): Data (typically PARAMs)
4.4.1.39. msg-log-hdr Range Default
  • relts(4 bytes): Relative timestamp since startup
4.4.1.40. qar-datagram-log-hdr Range Default
  • relts(4 bytes): Relative timestamp since startup
  • flags(2 bytes): Reserved for potential future flags for packet
  • length(2 bytes): Length of packets in bytes
4.4.1.41. param-common Range Default
  • unit(2 bytes): If appropriate, which unit this parameter applies to (e.g. Engine #1)
  • subunit(2 bytes): If appropriate, which subunit this parameter applies to (e.g. Engine #2, Cylinder #3)
  • ident(4 bytes): XFS Parameter Identifier
  • format(1 bytes): Format of data element
  • confidence(1 bytes): Confidence of data element
  • ttl(1 bytes): Time to live in milliseconds encoded using the MEMS encoding
  • pflags(1 bytes): Reserved Flags, bottom 3 bits are certification level of data
4.4.1.42. param-range-tick Range Default
  • flags(2 bytes): Flags if any
  • color(2 bytes): See tick color definition
  • value(4 bytes): Value *above* which the tick should apply (except blue)
  • label(8 bytes): Name associated with label

4.5. Parameter Ranges

All parameter attributes values are typed, but some are further constrained to certain ranges. The ranges may limit in both value and display purposes. The display 'ticks' can define various classifications such as a green, yellow, or red range. Furthermore, ranges can change over time. For instance, good oil pressure for a cold engine may be normally higher than that for a warm engine and a special parameter can be broadcast to indicate a range change. Table 39 defines the RANGE parameter format.

Parameters that have a default range have that range described in the next section. The default range will be displayed in tabular format. Many parameters have default and unchangeable ranges, while others have dynamic ranges. Parameters that have dynamic ranges use a parameter that only differs in the length portion of the Parameter Data Len & Ident attribute. and having a RANGE attribute as its payload. The receiving node MUST distinguish between the value and the range parameters by examining the length portion of the parameter's attribute. Should a parameter attribute value be outside the permitted range. the value MUST be ignored.

In the style of the next section, a generic range parameter is defined below:

4.5.1. Sample Range Parameter

  • Parameter ID: Same as main parameter.
  • Unit Usage: Same as main parameter.
  • SubUnit Usage: Same as main parameter.
  • Length: RANGE Length - 24 decimal plus tick data length.
  • Format: RANGE (See Table 39.)

4.5.2. Ranges

This section defines the default attribute ranges that are used in XSEDE.

4.5.2.1. SERVO Range Default
  • Minimum Value: -100000
  • Maximum Value: 100000
  • Minimum Display Value: -100000
  • Maximum Display Value: 100000
  • Divisor: 1000
4.5.2.2. ROLL Range Default
  • Minimum Value: -18000
  • Maximum Value: 17999
  • Minimum Display Value: -18000
  • Maximum Display Value: 17999
  • Divisor: 100
4.5.2.3. PITCH Range Default
  • Minimum Value: -9000
  • Maximum Value: 8999
  • Minimum Display Value: -9000
  • Maximum Display Value: 9000
  • Divisor: 100
4.5.2.4. PERCENT Range Default
  • Minimum Value: 0
  • Maximum Value: 100
  • Minimum Display Value: 0
  • Maximum Display Value: 100
  • Divisor: 1
4.5.2.5. THOUPERCENT Range Default
  • Minimum Value: 0
  • Maximum Value: 100000
  • Minimum Display Value: 0
  • Maximum Display Value: 100000
  • Divisor: 100
4.5.2.6. HDG Range Default
  • Minimum Value: 100
  • Maximum Value: 36099
  • Minimum Display Value: 1
  • Maximum Display Value: 36000
  • Divisor: 100
4.5.2.7. OBS Range Default
  • Minimum Value: 1000
  • Maximum Value: 360000
  • Minimum Display Value: 0
  • Maximum Display Value: 360000
  • Divisor: 1000
4.5.2.8. DEVIATION Range Default
  • Minimum Value: -1000
  • Maximum Value: 1000
  • Minimum Display Value: -1000
  • Maximum Display Value: 1000
  • Divisor: 1
4.5.2.9. FLAPS Range Default
  • Minimum Value: -1000
  • Maximum Value: 1000
  • Minimum Display Value: -1000
  • Maximum Display Value: 1000
  • Divisor: 1
4.5.2.10. BRIGHTNESS Range Default
  • Minimum Value: 0
  • Maximum Value: 2000
  • Minimum Display Value: 0
  • Maximum Display Value: 2000
  • Divisor: 1
4.5.2.11. COMFREQ Range Default
  • Minimum Value: 11800000
  • Maximum Value: 13699999
  • Minimum Display Value: 11800000
  • Maximum Display Value: 13699999
  • Divisor: 100000

4.6. Dictionary Types

This section declares the initial set of XSEDE dictionaries. Each dictionary is defined by a name and short definition. It contains a set of entries that represent the name value mappings of the dictionary mentioned dictionary. There are some primitive dictionaries without entries that specify the format of the data (i.e. octal or hex)

4.6.1. numbersok - Options for whether bare numbers are acceptable

  • FALSE (0) : Bare numbers are not permitted
  • TRUE (1) : Bare numbers are permitted and in output strings are represented in decimal form
  • OCTAL (2) : Bare numbers are permitted and in output strings are represented in octal
  • HEX (3) : Bare numbes are permitted and in output strings are represented in hexadecimal

4.6.2. ttl_mems - Convert times to their closest 8-bit mantissa-exponent representation

  • NEVER (0) : Does not expire
  • DEFAULT (256) : Use default value if specified elsewhere

4.6.3. none - Generic unsigned 32-bit value

4.6.4. signedval - Generic signed 32-bit value

4.6.5. hex - Hexadecimal representation

4.6.6. octal - Octal representation

4.6.7. component_feature - Flags that specified requested features or actions of a component

  • REQUEST_TIMESLOT ((1U << 0)) : Request a timeslot (if supported)
  • REQUEST_REALTIME ((1U << 1)) : Request hard realtime (if supported)
  • NEED_CONFIGURE ((1U << 2)) : Component is launching in config mode
  • NEED_DUMP ((1U << 3)) : At first run, perform dump instead of normal operation
  • NEED_FORK ((1U << 4)) : At first run, become a background process (if supported)
  • NEED_KILL ((1U << 5)) : Kill off a running version of the component (if supported)
  • SKIP_LOADCONFIG ((1U << 6)) : Skip normal configuration loading
  • HAS_TOUCH ((1U << 7)) : Application is running with an active touch interface
  • HIDECMDLINE ((1U << 8)) : Hide command line outputs
  • NOECHO ((1U << 9)) : Disable echo of received characters

4.6.8. component_debug - Component debugging flags

  • RXDUMP ((1U << 0)) : Enable dumping of received messages from the XFS Bus by this component
  • TXDUMP ((1U << 1)) : Enable dumping of messages transmitted to the XFS Bus from this component

4.6.9. agg_feature - Features associated with aggregated applications

  • NONE (0) : No selected features
  • PULLED ((1 << 0)) : Pulled
  • COLLARED ((1 << 1)) : Should not be reset in flight
  • AUTOSTART ((1 << 2)) : Automatically start on reboot if not pulled/collared
  • AUTORESET ((1 << 3)) : Reset from pulled or tripped state on reset

4.6.10. canid - CAN ID special flags and numbers

  • EFF ((1U << 31)) : Extended Frame Flag
  • RTR ((1U << 30)) : Remote Transmission Request
  • ERR ((1U << 29)) : Error Message

4.6.11. msg_cmd_updstat_flag - Maintenance mode status update flags

  • SUCCESS ((1U << 0)) : Update is complete and successful
  • ERROR ((1U << 1)) : Error during update

4.6.12. mm_apt_layer - Types of airports to display within layering of airport information

  • PRIVATE ((1U << 0)) : Display private airports
  • WATER ((1U << 1)) : Display sea ports
  • HELI ((1U << 2)) : Display heliports
  • MILITARY ((1U << 3)) : Display military airfields

4.6.13. mm_tlayer - Topology, raster and related static mapping layers

  • NONE (0) : No Layers Enabled
  • TOPO ((1U << 0)) : Topography
  • TERRAIN ((1U << 1)) : Terrain warnings
  • OBSTACLES ((1U << 2)) : Obstacles
  • TRAFFIC ((1U << 3)) : Traffic
  • VFR ((1U << 4)) : VFR Chart
  • LOALT ((1U << 5)) : Low Altitude IFR
  • HIALT ((1U << 6)) : High Altitude IFR
  • CALLSIGNS ((1U << 7)) : Traffic Callsigns
  • VORS ((1U << 8)) : VOR Stations
  • FIXES ((1U << 9)) : RNAV Fixes
  • WATER ((1U << 10)) : Detailed Water

4.6.14. mm_wlayer - Dynamic weather layers for maps

  • NONE (0) : No Layers Enabled
  • NEXRAD ((1U << 0)) : NEXRAD Radar Overlay
  • WIND ((1U << 1)) : Wind Data
  • LIGHTNING ((1U << 2)) : Lightning Overlay
  • ICING ((1U << 3)) : Icing Forecast
  • TURB ((1U << 4)) : Turbulence Forecast
  • CLOUDS ((1U << 5)) : Cloud Tops Forecast

4.6.15. mm_alayer - DO-358A AIRMET and SIGMET layers for mapping

  • NONE (0) : No Layers Enabled
  • TFR ((1U << 0)) : Temporary Flight Restriction
  • TURB ((1U << 1)) : Turbulence
  • LLWS ((1U << 2)) : Low Level Wind Shear
  • SFC ((1U << 3)) : Strong Surface Winds
  • ICING ((1U << 4)) : Icing Conditions
  • FRZLVL ((1U << 5)) : Lowest Freezing Level
  • IFR ((1U << 6)) : Instrument Flight Conditions
  • MTN ((1U << 7)) : Mountain Obscuration
  • CONVSIG ((1U << 17)) : Convective Sigmet

4.6.16. mm_param - Parameters for rendering of moving maps

  • SCALE (0x0001) : Map Scale in pixels per degree lat
  • CLAT (0x0002) : Center map at this lattitude -- 0x80000000 to track aircraft
  • CLON (0x0003) : Center map at this longitude -- 0x80000000 to track aircraft
  • APTLAYER (0x0004) : Bitmask of XFS_MM_APT_LAYER_* for what to display
  • WIDTH (0x0005) : Width in pixels of map
  • HEIGHT (0x0006) : Height in pixels of map
  • TLAYERS (0x0007) : Topography/Obstacle/Terrain/Traffic layers
  • WLAYERS (0x0008) : Weather Layers layers
  • ALTSEL (0x0009) : Altitude sel for Winds etc -- 0x80000000 to track current altitude
  • ALAYERS (0x000a) : AIRMET/SIGMET layers
  • AUTOTRACK (0x80000000) : AutoTrack value for tracking aircraft position and altitude

4.6.17. efb_param - Parameters for rendering of georeferenced procedures

  • SCALE (0x0001) : EFB Scale in relative pixels where 1000 is 1:1 pixel scaling
  • CLAT (0x0002) : Center map at this lattitude -- 0x80000000 to track aircraft
  • CLON (0x0003) : Center map at this longitude -- 0x80000000 to track aircraft
  • FIXNAME (0x0004) : Name of fix for which information is desired
  • WIDTH (0x0005) : Width in pixels of EFB Content
  • HEIGHT (0x0006) : Height in pixels of EFB Content
  • PAGE (0x0007) : Name of page within EFB
  • TARGET (0x0008) : Page specific target within EFB page

4.6.18. sv_param - Parameters for rendering of synthetic vision

  • WIDTH (0x0001) : Width in pixels of view
  • HEIGHT (0x0002) : Height in pixels of view

4.6.19. unit - XFS parameter unit values

  • ANY (0xffff) : Any Unit

4.6.20. unitmask - Mask of unit values

  • NONE (0) : No units selected
  • 1 ((1U << 0)) : Unit 1 selected
  • 2 ((1U << 1)) : Unit 2 selected
  • 3 ((1U << 2)) : Unit 3 selected
  • 4 ((1U << 3)) : Unit 4 selected
  • 5 ((1U << 4)) : Unit 5 selected
  • 6 ((1U << 5)) : Unit 6 selected
  • 7 ((1U << 6)) : Unit 7 selected
  • 8 ((1U << 7)) : Unit 8 selected
  • 9 ((1U << 8)) : Unit 9 selected
  • 10 ((1U << 9)) : Unit 10 selected
  • 11 ((1U << 10)) : Unit 11 selected
  • 12 ((1U << 11)) : Unit 12 selected
  • 13 ((1U << 12)) : Unit 13 selected
  • 14 ((1U << 13)) : Unit 14 selected
  • 15 ((1U << 14)) : Unit 15 selected
  • 16 ((1U << 15)) : Unit 16 selected
  • 17 ((1U << 16)) : Unit 17 selected
  • 18 ((1U << 17)) : Unit 18 selected
  • 19 ((1U << 18)) : Unit 19 selected
  • 20 ((1U << 19)) : Unit 20 selected
  • 21 ((1U << 20)) : Unit 21 selected
  • 22 ((1U << 21)) : Unit 22 selected
  • 23 ((1U << 22)) : Unit 23 selected
  • 24 ((1U << 23)) : Unit 24 selected
  • 25 ((1U << 24)) : Unit 25 selected
  • 26 ((1U << 25)) : Unit 26 selected
  • 27 ((1U << 26)) : Unit 27 selected
  • 28 ((1U << 27)) : Unit 28 selected
  • 29 ((1U << 28)) : Unit 29 selected
  • 30 ((1U << 29)) : Unit 30 selected
  • 31 ((1U << 30)) : Unit 31 selected
  • 32 ((1U << 31)) : Unit 32 selected

4.6.21. subunit - XFS parameter subunit values

  • ANY (0xffff) : Any Subunit

4.6.22. preset - XFS Preset Frequency

  • MANUAL (0) : Manual Tuning (no preset)
  • LAST (0xfffe) : Last selected frequency

4.6.23. tcid - XFS transcoder ID values

  • NONE (0) : No transcoder ID is required or asserted
  • DEFAULT (65536) : Pseudo-value to represent global default

4.6.24. suip_id - SUIP Identifier

  • NONE (0) : No SUIP ID for the actuator
  • TOUCH (0xffff) : SUIP Via Touch

4.6.25. boolean - Nominal boolean values

  • FALSE (0) : False
  • TRUE (1) : True

4.6.26. ruleresult - Return values for XFS rules

  • CLEAR (0) : Rule evaluates as false
  • SET (1) : Rule evaluates as true
  • UNKNOWN (-1) : Insufficient information to evaluate rule

4.6.27. alignment - Horizontal and vertical geometric alignments

  • HMASK (0x0f) : Horizontal alignment mask
  • HCENTER (0x01) : Horizontally centered
  • LEFT (0x02) : Left aligned
  • RIGHT (0x03) : Right aligned
  • VMASK (0xf0) : Vertical alignment mask
  • VCENTER (0x10) : Vertically centered
  • BOTTOM (0x20) : Bottom aligned
  • TOP (0x30) : Top aligned

4.6.28. engstate - States of engines

  • UNKNOWN (0x00) : Engine Status Unknown
  • OFF (0x01) : Engine is Off
  • DRYMOTOR (0x02) : Engine Starting
  • STARTING (0x03) : Engine Starting
  • RUNNING (0x04) : Engine Running Normally
  • FLAMEOUT (0x05) : Engine Flamed Out / Failure
  • SHUTDOWN (0x06) : Engine Shutting Down
  • SHUTOFF (0x07) : Engine Shut Off
  • MODE_MASK (0xff) : Mask for Engine State
  • FLAG_IGNITION ((1U << 8)) : Ignition On
  • FLAG_FUEL ((1U << 9)) : Fuel Shutoff Open
  • FLAG_STARTER ((1U << 10)) : Starter On
  • FLAG_GENERATOR ((1U << 11)) : Generator On
  • FLAG_BLEED ((1U << 12)) : Bleed Air On
  • FLAG_FIRE ((1U << 16)) : Fire Present
  • FLAG_EXTINGUISH ((1U << 17)) : Extinguisher Dispensed

4.6.29. pid_state - States of proportional-integral-derivative control logic

  • UNKNOWN (0x00) : PID Status Unknown
  • SETTLED (0x01) : PID Settled On Desired Value
  • CONVERGING (0x02) : PID Oscillating With Decreasing Amplitude
  • OSCILLATING (0x03) : PID Oscillating With Constant Amplitude
  • DIVERGING (0x04) : PID Oscillating With Increasing Amplitude

4.6.30. shape - Shapes for use in vector drawings

  • NONE (0x00) : No shape
  • OVAL (0x01) : Oval Shape
  • LINE (0x02) : Line Shape
  • TRIANGLE (0x03) : Triangle Shape
  • DIAMOND (0x04) : Diamond Shape
  • PENTAGON (0x05) : Pentagon Shape
  • HEXAGON (0x06) : Hexagon Shape
  • SEPTAGON (0x07) : Septagon/Heptagon Shape
  • OCTAGON (0x08) : Octagon Shape
  • NONAGON (0x09) : Nonagon/Enneagon Shape
  • DECAGON (0x0A) : Decagon Shape

4.6.31. ldggear - Status of retractable landing gear

  • UNKNOWN (0x0000) : Gear Status Unknown
  • DOWN (0x0001) : Landing Gear Down
  • UP (0x8000) : Landing Gear Up
  • FLAG_FAILED ((1U << 16)) : Landing Gear System is Failed

4.6.32. brake - Status of wheel brakes

  • UNKNOWN (0x0000) : Brake Status Unknown
  • NONE (0x0001) : Brakes not pressed
  • MAX (0x8000) : Max Braking
  • PARK ((1U << 16)) : Parking Brake Engaged
  • FLAG_FAILED ((1U << 17)) : Brake System is Failed

4.6.33. ecbunit - ECB unit numbers

  • TYPE_MASK (0xf000) : Mask for ECB type flag
  • TYPE_ECB (0x0000) : Generic ECB
  • TYPE_BUS (0x1000) : Bus
  • TYPE_GENALT (0x2000) : Starter/Generator/Alternator
  • TYPE_BATT (0x3000) : Battery

4.6.34. icing_flag - Status of ice detection, anti-ice and deicing systems

  • ENGINE ((1U << 0)) : Engine Deicing/Anticing On
  • AIRFRAME ((1U << 1)) : Airframe Deicing/Anticing On
  • INSEP ((1U << 2)) : Inertial Separator Activated
  • PITOT ((1U << 3)) : Pitot/Static Heat Activated
  • PROPHEAT ((1U << 4)) : Propeller Heat Activated
  • WINDHEAT ((1U << 5)) : Windshield Heat Activated
  • CARBHEAT ((1U << 6)) : Carb Heat Activated
  • CARBICEDET ((1U << 14)) : Carb Icing Detected
  • ICEDET ((1U << 15)) : Icing Detected
  • ENGINE_FAIL ((1U << 16)) : Engine Deicing/Anticing Failed
  • AIRFRAME_FAIL ((1U << 17)) : Airframe Deicing/Anticing Failed
  • INSEP_FAIL ((1U << 18)) : Inertial Separator Failed
  • PITOT_FAIL ((1U << 19)) : Pitot/Static Heat Failed
  • PROPHEAT_FAIL ((1U << 20)) : Propeller Heat Failed
  • WINDHEAT_FAIL ((1U << 21)) : Windshield Heat Failed
  • CARBHEAT_FAIL ((1U << 22)) : Carb Heat Failed
  • CARBICEDET_FAIL ((1U << 30)) : Carb Icing Detection Failed
  • ICEDET_FAIL ((1U << 31)) : Icing Detection Failed

4.6.35. cantun - CAN tunneling 29-bit address special fields

  • TUNNEL ((1U << 28)) : Tunneled Data
  • DEVMASK (0xff00000) : Mask for what type of device
  • DEV_SERIAL (0x0100000) : RS-232/422/485 Serial Port
  • DEV_CONFIG (0x0200000) : Configuration Commands
  • DEV_HEALTH (0x0300000) : Health Status
  • DEV_AR429 (0x0400000) : ARINC-429
  • DEV_MIL1553 (0x0500000) : MIL-STD-1553
  • DEV_ECB (0x0600000) : Electronic Circuit Breaker
  • DEV_GPIO (0x0700000) : GPIO's
  • DEV_CANBUS (0x0800000) : Reserved for possible CAN in CAN tunneling
  • OPMASK (0xf0000) : Mask for what operation on device
  • OPTXMASK (0x10000) : Operation is a transmit operation
  • OP_RXDATA (0x00000) : Received from peripheral
  • OP_TXDATA (0x10000) : Transmit to peripheral
  • OP_RXSTATUS (0x20000) : Status Information Reply
  • OP_TXSTATUS (0x30000) : Transmitted Status Information Request
  • OP_RXFLAGS (0x40000) : Current received flags + status (48 bits total)
  • OP_TXFLAGS (0x50000) : Set transmit flags + status (48 bits total)
  • SEQNO_FLAG_BEGIN ((1U << 15)) : Beginning of a whole message (Transmit)
  • SEQNO_FLAG_END ((1U << 14)) : End of a whole message
  • SEQNO_MASK (0x3fff) : Max Sequence number

4.6.36. cantun_cmd - CAN configuration commands

  • ACK (0x01) : Or'd with command for response
  • DISCOVER (0x02) : Each unit sends a reply with its ID in response to a discover
  • CONCONSOLE (0x04) : Connect Console
  • DISCONSOLE (0x06) : Disconnect Console

4.6.37. cantun_txstatus_flag - CPU to non-CPU communication of status

  • RESETMISS ((1U << 0)) : Reset miss counters
  • CPUSEL ((1U << 15)) : Count with respect to CPU

4.6.38. config_type - XFS configuration file value data types

  • SINT (1) : 32-bit signed 2's complement integer
  • UINT (2) : 32-bit unsigned integer
  • STRING (3) : Optionally null terminated string
  • FLOAT (4) : IEEE 754 floating point number
  • IPADDR (5) : 32-bit IPv4 IP address
  • SIGNATURE (255) : System specific cryptographic signature
  • OBJECTBEG (256) : Begin an object definition
  • OBJPTRBEG (257) : Begin pointer to an object
  • OBJECTSEP (258) : Separates entries in an array
  • OBJECTEND (259) : Ends an entry for an object or object pointer

4.6.39. config_perm - XFS configuration file value permissions

  • MANDATORY ((1U << 16)) : Must be specified
  • DELEGATE ((1U << 8)) : Allow delegating permission to level in bits 7-0
  • VENDOR (200) : Avionics Vendor
  • FACTORY (150) : Aircraft Manufacturer
  • OWNER (125) : Aircraft Owner
  • MAINT (100) : Aircraft Maintenance Facility
  • SYSTEM (90) : Saved Aircraft State
  • DATA (75) : Navigational Data
  • USER (50) : Pilot
  • INHERIT (1) : Object parameters inherit from object permission
  • UNSET (0) : Permission has not been established

4.6.40. msg_class - XFS common data bus message classes

  • MAINT (2) : Maintenance Message
  • OP (3) : Operational Message
  • RAW (4) : Access to raw data stream (e.g. RS-232, RS-485, ARINC-429, etc)

4.6.41. ac_status - XFS aircraft state

  • GND (0) : Non flight mode
  • FLIGHT (1) : Aircraft in flight
  • MAINT (2) : Aircraft is in maintenance mode

4.6.42. msg_op - Message subclasses for operational message class

  • SUBFLDATA (1) : Subscribe to Aircraft Flight Data Params
  • FLIGHTDATA (2) : Flight Data Info
  • DEVSTATUS (3) : Device Status
  • GDL90 (4) : GDL-90 Format Messages without framing, FCS or escape characters
  • SUBMSGCLID (5) : Subscribe to Specific Message Class and ID

4.6.43. msg_raw - Message subclasses for raw message class

  • SERIALRX (1) : Serial raw data stream receive from end device
  • SERIALTX (2) : Serial raw data stream transmit to end device
  • SPIRX (5) : Raw SPI bus receive from end device
  • SPITX (6) : Raw SPI bus transmit to end device
  • ARINC429RX (7) : Raw ARINC-429 bus receive from end device
  • ARINC429TX (8) : Raw ARINC-429 bus transmit to end device
  • MIL1553RX (9) : Raw MIL-STD-1553 received from end device
  • MIL1553TX (10) : Raw MIL-STD-1553 bus transmit to end device
  • ECBRX (11) : Raw XFS ECB control receive from end device
  • ECBTX (12) : Raw XFS ECB control transmit to end device
  • GPIORX (13) : Raw XFS ECB control receive from end device
  • GPIOTX (14) : Raw XFS ECB control transmit to end device
  • ADCRX (15) : Analog/Digital Converter receive from end device
  • DACTX (16) : Digital/Analog Converter transmit to end device
  • CANBUSRX (17) : Raw CAN bus receive from end device
  • CANBUSTX (18) : Raw CAN bus transmit to end device
  • DATAGRAMRX (19) : Raw Datagram receive from end device
  • DATAGRAMTX (20) : Raw Datagram transmit to end device

4.6.44. msg_maint - Message subclasses for maintenance message class

  • MXREQ (1) : Request maintenance mode for a specific CPU (or all if cpu is empty)
  • MXCHAL (2) : Authentication challenge
  • MXAUTH (3) : Authentication response
  • MXACCEPT (4) : Accept authentication request
  • MXDENY (5) : Deny maintenance mode
  • MXREADY (6) : Ready for update or diagnostic
  • DOUPDATE (7) : User Requests System Update. Note CPU is requestor
  • UPDREQ (8) : Request Update for given Device
  • UPDSTAT (9) : Status of Update
  • DODIAG (10) : User Requests System Update. Note CPU is requestor. Salt is type of diagnostic.
  • DIAGREQ (11) : Request diagnostic for given Device.
  • DIAGSTAT (12) : Status of Update

4.6.45. msg_flag_cert - Message and parameter certification level tracking

  • EXPERIMENTAL (0) : Experimental
  • LEVEL_E (1) : DO-178 Level E
  • LEVEL_D (2) : DO-178 Level D
  • LEVEL_C (3) : DO-178 Level C
  • LEVEL_B (4) : DO-178 Level B
  • LEVEL_A (5) : DO-178 Level A

4.6.46. msg_source_flag - Flags for XFS message sources

  • ALWAYSXMIT ((1U << 0)) : Transmit all parameters even if confidence is useless
  • COPYSELF ((1U << 1)) : Process this message as a received message as well
  • DEBUGONLY ((1U << 2)) : This message is only used only for debugging and not normal operation
  • IMMPREBUF ((1U << 3)) : Immediately prebuffer parameters within this message even before transmission

4.6.47. param_source_flag - Flags for individual parameter sources within XFS message sources

  • ALWAYSVALID ((1U << 0)) : Parameter source has a fixed value
  • TRIGGERXMIT ((1U << 1)) : Candidate for triggering message transmission

4.6.48. param_confidence - XFS common bus parameter format confidence levels

  • HIGH (100) : Confirmed known value
  • USERSEL (90) : User selected value at runtime
  • SYSSEL (80) : System selected value at runtime
  • UNANIMOUS (50) : Redundant data available and is rationalized
  • RATIONAL (40) : Data being rationalized from other data sources with normal sources ignored
  • VOTED (30) : Data is redundantly verified from identical instruments
  • SMOOTHED (20) : Smoothed/filtered version of raw data
  • RAW (10) : Raw, unchecked data
  • ESTIMATE (5) : Rough estimation
  • USELESS (0) : Value is missing or expected invalid and supplied for debugging ONLY

4.6.49. endian - CPU endian formats

  • HOST (0) : Host Endian Byte Order
  • LITTLE (1) : Little Endian Byte Order
  • BIG (2) : Big Endian Byte Order

4.6.50. datagram_direction - Datagram Direction Types

  • UNKNOWN (0) : Unknown or unspecified direction type
  • SOURCE (1) : We are a source of information for this connection
  • DESTINATION (2) : We are a destination of information for this connection
  • BIDIRECTIONAL (3) : We are both a source and destination of information for this connection

4.6.51. param_units - Units for the encoding and translation of XFS parameters

  • UNSPEC (0x0) : Units not specified
  • INHG (0x0001U) : Use inches of Hg for BARO/MANPRES
  • FT (0x0002U) : Use feet for altitude
  • NM (0x0003U) : Use nautical miles for distance
  • C (0x0004U) : Use celcius for temperature
  • LBFT (0x0005U) : Use pound-feet for torque
  • S (0x0006U) : Use seconds for time
  • A (0x0007U) : Use amps for current
  • V (0x0008U) : Use volts for voltage
  • LB (0x0009U) : Use pounds for weight
  • IN (0x000aU) : Use inches for distance
  • FPM (0x000bU) : Use feet per minute for rate of climb/descent
  • LBPH (0x000cU) : Pounds per Hour for fuel flow
  • DEGPS (0x000dU) : Degrees per second for attitude change
  • DEG (0x000eU) : Degrees for attitude
  • G (0x000fU) : G force for load
  • RGBA (0x0010U) : 8888 RGBA Value
  • MHZ (0x0011U) : Megahertz for Frequency
  • PCENT (0x0012U) : Percent of Maximum
  • KT (0x0013U) : Knots for Speed
  • NMPLB (0x0014U) : Nautical Miles per Pound
  • KTPS (0x0015U) : Knots per second
  • MACH (0x0016U) : Speed of sound
  • CPM (0x0017U) : Count per minute
  • PPM (0x0018U) : Parts per million
  • LPM (0x0019U) : Liters Per Minute
  • KW (0x001aU) : Kilowatt
  • AH (0x001bU) : Amp Hour
  • GAL (0x001cU) : Gallons of volume
  • NMPGAL (0x001dU) : Nautical Miles per Gallon
  • GPH (0x001eU) : Gallons per Hour for fuel flow
  • MEMS (0x001fU) : Mantissa/Exponent Milliseconds (2^E)*(M+16)
  • HPA (0x8001U) : Use Hecto pascals for BARO
  • M (0x8002U) : Use meters for altitude
  • SM (0x8003U) : Use statute miles for distance
  • F (0x8004U) : Use fahrenheit for temperature
  • NWM (0x8005U) : Use Newton Meters for torque
  • PSI (0x8006U) : Use PSI for MANPRES
  • MPH (0x8007U) : Use miles per hour for speed
  • SMPLB (0x8008U) : Statute Miles per Pound
  • MIN (0x8009U) : Minutes
  • HR (0x800aU) : Hours
  • HP (0x800bU) : Use Horsepower for power
  • KG (0x800cU) : Use kilograms at earth gravity for weight
  • L (0x801cU) : Liters of volume
  • LPH (0x001eU) : Liters per Hour for fuel flow
  • UL (0xffffU) : Unitless

4.6.52. param_copy_result - Possible return results from copying parameters from/to network format

  • SUCCESS (0) : Parameter copied/loaded properly
  • UNKNOWN_PARAM ((1U << 0)) : Parameter not known
  • UNKNOWN_FORMAT ((1U << 1)) : Parameter format not known
  • MISMATCH_FORMAT ((1U << 2)) : Parameter format does not match what we expect its format to be
  • MISSING ((1U << 3)) : Source of parameter (e.g. config file) is missing or empty
  • CHKSUMFAIL ((1U << 4)) : Source of parameter had failed checksum
  • DESIGNFAIL ((1U << 5)) : Design of parameter system contains an error
  • IMPROPER_FORMAT ((1U << 6)) : Conversion of parameter from ASCII source encountered syntactical error
  • UNIMPLEMENTED ((1U << 7)) : This method of copying a parameter is not implemented
  • POS_NOT_FOUND ((1U << 8)) : Position not found
  • IO_ERROR ((1U << 9)) : I/O Error
  • SHORT_SRC ((1U << 10)) : Insufficient data in source parameter
  • SHORT_DST ((1U << 11)) : Insufficient data in destination parameter

4.6.53. cas_msglvl - Message levels for CAS messages and checklist items

  • CLEAR (0) : Clear a previously issued CAS message -- issue from system only
  • DEBUG (1) : In-system debugging output only
  • LOG (2) : Log to system log, but do not display
  • MAINT (3) : Display only for maintenance purposes
  • STATUS (4) : Aircraft system status only
  • ADVISORY (5) : Advisory, flight crew should be aware, may require later crew response
  • CAUTION (6) : Caution, requires immediate flight crew awareness and later response
  • WARNING (7) : Warning, requires immediate awareness and response.
  • COMMENT (10) : Checklist Comment Associated with Previous Item
  • UNCHKITEM (11) : Unchecked Checklist Item
  • CHKITEM (12) : Checked Checklist Item
  • CHKBRANCH (13) : Checklist Branch Choice
  • PASS (14) : Built-in Test (BIT) Item passed
  • INPROG (15) : Built-in Test (BIT) Item in progress
  • NOTREQST (16) : Built-in Test (BIT) Item not yet requested
  • INCOMPLT (17) : Built-in Test (BIT) Item test did not complete
  • FAIL (18) : Built-in Test (BIT) Item failed

4.6.54. cas_msgflag - Additional flags associated with CAS messages

  • NONE (0) : No additional flags
  • AUTO ((1U << 0)) : Item is automatically checked/unchecked or the test is automatically executed

4.6.55. sched_period - Schedule periods with special meanings

  • 10MS (10000) : Every task should run at least once per 10ms
  • 1MS (1000) : Every task should run at least once per 1ms
  • 100US (100) : Every task should run at least once per 100uS
  • 30FPS (33333) : Thirty Frames per Second

4.6.56. tick_color - Color values for ticks within range parameters

  • GREEN (0) : Green Area
  • YELLOW (1) : Yellow Area
  • RED (2) : Red Area
  • WHITE (3) : White Area
  • CLEAR (4) : Empty / no color
  • BLUE (5) : Blue line -- does not change color above

4.6.57. com_state - State of communication radio

  • IDLE (R) : Ready to Receive (Idle)
  • RX (r) : Active receiving
  • TX (T) : Active transmitting
  • STUCK (S) : Stuck Mic
  • FAULT (F) : Fault

4.6.58. com_target - COM Radio Target Destination

  • INAIR (0) : Radio used primarily for in-air communication
  • GROUND (1) : Radio used primiarly for on/to-ground communication
  • BOTH (2) : Radio used equally for in-air and on-ground communication

4.6.59. ics_mode - State of intercom system

  • PILOT (P) : Pilot Isolate
  • CREW (C) : Crew Isolate
  • ALL (A) : All
  • FEATUREMASK (0xff00) : Mask for intercom features
  • POSITIONAL ((1U << 8)) : Positional dynamic audio

4.6.60. xpdr_mode - Transponder mode and flags

  • UNKNOWN (0) : Unknown
  • MODEMASK (0x7f) : Mask for mode
  • STANDBY (O) : Standby
  • GND (G) : On Ground
  • AIR (A) : Air/Altitude Reporting
  • FLAG_IDENT ((1U << 7)) : IDENT Active

4.6.61. traffic_type - Traffic threat categorization

  • NONTHREAT (0) : Non Threatening
  • PROXIMITY (1) : Proximity
  • ADVISORY (2) : Advisory
  • RESOLUTION (3) : Resolution

4.6.62. nav_flag - Navigational flag states

  • BACKCOURSE ((1U << 0)) : NAV receiver is flying a localizer back course
  • LOCDETECT ((1U << 1)) : The NAV receiver is detecting a localizer
  • FROM ((1U << 2)) : The FROM flag is detected from a VOR
  • TO ((1U << 3)) : The TO flag is detected from a VOR
  • GSI_SFLAG ((1U << 4)) : The glideslope superflag is present
  • GSI_VALID ((1U << 5)) : The glideslope signal is being received and is valid
  • NAV_SFLAG ((1U << 6)) : The NAV super flag is present
  • NAV_VALID ((1U << 7)) : The localizer or VOR signal is being received and is valid
  • FAULT ((1U << 8)) : Fault detected

4.6.63. weightbal_station - Weight and balance station types

  • HULL (1) : This station corresponds to the basic empty aircraft
  • FUEL (2) : This station is a fuel tank. Its weight will be in XFS_PARAM_FUELWT
  • PASSENGER (3) : This station contains a passenger
  • BAGGAGE (4) : This station contains baggage or cargo

4.6.64. weightbal_category - Aircraft operational categories

  • NORMAL (1) : Normal Category
  • UTILITY (2) : Utility Category
  • ACROBATIC (3) : Acrobatic Category
  • COMMUTER (4) : Commuter Category

4.6.65. weightbal_status - Weight and balance status

  • OK (0) : Weight and balance is OK
  • FWD ((1U << 0)) : Balance is forward of minimum CG for this weight
  • AFT ((1U << 1)) : Balance is aft of maximum CG for this weight
  • OVWTSTATN ((1U << 2)) : One or more stations are overweight
  • OVERMGTOW ((1U << 3)) : Weight exceeds maximum gross takeoff weight
  • OVERMLW ((1U << 4)) : Weight exceeds max landing weight
  • OVERZFW ((1U << 5)) : Weight exceeds max zero fuel weight

4.6.66. flight_state - Status of aircraft within flight profile

  • UNKNOWN (0) : The state of the aircraft is not known
  • OFF (1) : The aircraft is completely powered down
  • HIBERNATE (2) : Minimal aircraft systems online not visible to the pilot
  • PREFLIGHT (3) : Minimal aircraft systems for pilot interaction online
  • ENGINE_START (4) : Engine(s) are preparing to start or are starting
  • PRETAXI (5) : Engine(s) are started, awaiting pre-taxi items
  • TAXI (6) : Aircraft is ready or in process of taxiing
  • RUNUP (7) : Aircraft is ready for, or in process of performing runup
  • READY (8) : Aircraft is ready for and positioned just short of takeoff
  • TAKEOFF (9) : Aircraft is in process of performing takeoff
  • AFTER_TAKEOFF (10) : Aircraft is airborne immediately but not yet configured for normal climb
  • DEPARTURE (11) : Aircraft is on a standard instrument departure
  • CLIMB (12) : Aircraft is climbing but not on an instrument departure
  • CRUISE (13) : Aircraft is at final cruise
  • DESCENT (14) : Aircraft is descending not on a standard arrival
  • ARRIVAL (15) : Aircraft is on a standard arrival
  • APPROACH (16) : Aircraft is on an instrument approach procedure
  • VISUAL (17) : Aircraft is flying a visual traffic pattern
  • MISSED (18) : Aircraft is executing a missed approach
  • SHUTDOWN (19) : Aircraft engines are shutting down or have shut down
  • SECURE (20) : Aircraft systems are shutting down or reconfiguring for preflight

4.6.67. nav_gps - Global positioning system status

  • UNKNOWN (0) : GPS Navigation is in unknown state
  • ENROUTE (1) : GPS Navigation is in Enroute state
  • TERMINAL (2) : GPS Navigation is Terminal state
  • LNAV (3) : GPS Navigation is in Lateral Navigation State
  • LNAVVNAV (4) : GPS Navigation is Lateral and Vertical NAV state
  • LP (5) : GPS Navigation is in Localizer Performance state
  • LPV (6) : GPS Navigation is in Localizer Performance/Vertical state

4.6.68. ecb_state - Electronic circuit breaker status

  • UNKNOWN (0) : Circuit is in an unknown condition
  • OFF (1) : Circuit is turned off
  • ON (2) : Circuit is turned on
  • UNDERCUR (3) : Circuit is on, <100ma current drawn
  • RESET (4) : Request Reset
  • FORWARD (5) : ECB is active logical FWD direction
  • REVERSE (6) : ECB is active logical REV direction
  • TARGET (7) : ECB is set by target, not ON/OFF
  • BRAKELOW (8) : ECB is set by target, not ON/OFF
  • SHORTED (128) : Short Circuit
  • OVERCUR (129) : Overcurrent (but not short circuit)
  • OVERVOL (130) : Overvoltage situation
  • DISABLED (131) : Disabled by state-fault
  • RUNAWAY (132) : Disabled due to runaway (trim/flaps)
  • COLLARED (133) : Should not reset in flight
  • JAMMED (134) : Mechanical Jam detected
  • PULLED (135) : Pulled
  • BACKFLOW (136) : Disabled due to reverse current flow

4.6.69. ecb_flag - Electronic circuit breaker parameter flags

  • INPUTVOLTS ((1U << 0)) : Input Volts field is valid

4.6.70. scb_state - Software circuit breaker states

  • UNKNOWN (0) : State of software is unknown
  • STARTING (1) : Application is in startup phase
  • RUNNING (2) : Application is running
  • STOPPING (3) : Stopping has been requested
  • RESTART (4) : Restart Application (PULL + RESET + START)
  • RESET (5) : Allow application to be started
  • HUNG (6) : Application is running but is no longer responsive
  • DEGRADED (127) : Application is running in a degraded mode
  • STOPPED (128) : Application is stopped
  • STARTFAIL (129) : Application failed startup
  • RUNAWAY (130) : Application has a runaway loop
  • OVERCPU (131) : Application is using excessive CPU while in RUNNING state
  • OVERMEM (132) : Application terminated due to memory overrun
  • EXCEPTION (133) : Application terminated due to runtime exception
  • ENDED (134) : Application ended without error or request
  • ENDERROR (135) : Application ended with error condition
  • PULLED (136) : Application should not be allowed to run until reset
  • COLLARED (137) : Should not reset in flight

4.6.71. afcs_fd_mode - Vertical, lateral and yaw modes of flight director

  • VERT_MASK (0xff) : Vertical modes mask
  • LAT_MASK (0xff00) : Lateral modes mask
  • YAW_MASK (0xff000000) : Yaw modes mask
  • PITCH ((1U << 0)) : Activate pitch mode
  • VS ((1U << 1)) : Activate vertical speed mode
  • FLC ((1U << 2)) : Activate indicated airspeed mode / flight level change
  • PRF ((1U << 3)) : Activate angle of attack / performance mode
  • ALT ((1U << 4)) : Arm Altitude mode
  • VNAV ((1U << 5)) : Arm vertical nav mode
  • GP ((1U << 6)) : Arm approach mode vertical portion
  • FLARE ((1U << 7)) : Arm flare mode
  • ROLL ((1U << 8)) : Activate wing leveler mode
  • HDG ((1U << 9)) : Activate heading mode
  • NAV ((1U << 10)) : Arm navigation mode
  • APPR ((1U << 11)) : Arm approach mode
  • YD ((1U << 24)) : Fixed Yaw Damper
  • SLIP ((1U << 25)) : Activate slip mode (adjustable YD)
  • SLIPAPPR ((1U << 26)) : Activate approach slip mode (adjustable YD)

4.6.72. afcs_ap_mode - Vertical, lateral and yaw modes of autopilot and throttle

  • VERT_MASK (0xff) : Vertical modes mask
  • LAT_MASK (0xff00) : Lateral modes mask
  • THROT_MASK (0xff0000) : Throttle modes mask
  • YAW_MASK (0xff000000) : Yaw modes mask
  • PITCH ((1U << 0)) : Pitch mode
  • EPPITCH ((1U << 1)) : Pitch mode only for envelope protection
  • ROLL ((1U << 8)) : Roll mode
  • EPROLL ((1U << 9)) : Roll mode only for envelope protection
  • SPD ((1U << 16)) : Activate autothrottle speed tracking
  • EPSPD ((1U << 17)) : Autothrottle only for envelope protection (SPD mode)
  • AOA ((1U << 18)) : Activate autothrottle AoA tracking
  • EPAOA ((1U << 19)) : Autothrottle only for envelope protection (AOA mode)
  • TOGA ((1U << 20)) : Activate takeoff / go-around throttle
  • EPTOGA ((1U << 21)) : Autothrottle only for envelope protection (TOGA mode)
  • YAW ((1U << 24)) : Yaw mode
  • EPYAW ((1U << 25)) : Yaw envelope protection

4.6.73. afcs_servo - Servo engagement flags

  • ENGAGE ((1U << 31)) : If present in engagement request, along with 'ENGAGED' value, set engagment status
  • ENGAGED (1) : For requests, retain current engagement state, for status, present if currently engaged
  • DISENGAGED (0) : If engaged, disengage and for status, currently disengaged

4.6.74. fms_flag - Flight management system waypoint and leg flags

  • NONE (0) : No flags or leg type known
  • LEGTYPE_VA (1) : Heading to Altitude
  • LEGTYPE_VD (2) : Heading to DME Distance
  • LEGTYPE_VI (3) : Heading to Next Leg Intercept
  • LEGTYPE_VM (4) : Heading to Manual Termination
  • LEGTYPE_VR (5) : Heading to Radial Termination
  • LEGTYPE_CA (6) : Course to an Altitude
  • LEGTYPE_CD (7) : Course to a DME Distance
  • LEGTYPE_CI (8) : Course to Next Leg Intercept
  • LEGTYPE_CR (9) : Course to Radial Termination
  • LEGTYPE_CF (10) : Course to a Fix
  • LEGTYPE_TF (11) : Tracking Between Two Fixes
  • LEGTYPE_DF (12) : Direct to a Fix
  • LEGTYPE_FA (13) : Course from a Fix to an Altitude
  • LEGTYPE_FC (14) : Course from a Fix to an Along Track Distance
  • LEGTYPE_FD (15) : Course from a Fix to a DME Distance
  • LEGTYPE_FM (16) : Course from a Fix to a Manual Termination
  • LEGTYPE_AF (17) : Constant DMA Arc to a Fix
  • LEGTYPE_HF (18) : Hold to a Fix
  • LEGTYPE_HA (19) : Hold to an Altitude
  • LEGTYPE_HM (20) : Hold to a Manual Termination
  • LEGTYPE_IF (21) : Initial Fix
  • LEGTYPE_PI (22) : Procedure Turn to Intercept
  • LEGTYPE_RF (23) : Radius to a Fix
  • LEGTYPE_MASK (0xff) : Mask with which to retrieve leg type
  • FLYOVER ((1U << 8)) : If not present, fly by
  • DISC ((1U << 9)) : If present, Discontinuity before current waypoint
  • ACTIVE ((1U << 10)) : If present, this is the active waypoint
  • OBS ((1U << 11)) : If present, waypoint allows OBS to be set
  • FAF ((1U << 12)) : If present, waypoint is final approach fix or after
  • SUSPEND ((1U << 13)) : FMS sequencing is suspended at this waypoint
  • LAST ((1U << 14)) : This waypoint is the last one in the flight plan

4.6.75. fms_waypoint - Flight management system waypoint types

  • UNKNOWN (0) : Unknown or unspecified
  • GS ((1U << 7)) : Glideslope component
  • DME ((1U << 6)) : DME Component
  • TACAN ((1U << 5)) : TACAN Component
  • VOR (1) : VOR Component
  • LOC (2) : Localizer component
  • NDB (3) : NDB component
  • LDA (4) : LDA Component
  • SDF (5) : SDF Component
  • FIX (6) : Generic RNAV Fix
  • ILS (7) : Complete ILS system
  • AIRPORT (8) : An Airport
  • DIRECTFROM (9) : Starting point of a direct to
  • WEATHER (10) : Weather reporting station only

4.6.76. fms_waypoint_subunit - Special subunits used within the FMS

  • FIRST (1) : Starting waypoint of flight plan
  • FIRSTAP (65530) : First airport within flight plan
  • PREV (65531) : Starting waypoint of the active leg (if leg is not a direct to)
  • NEXT (65532) : Ending waypoint of the active leg
  • LASTAP (65533) : Final airport of flight plan if more than one airport in plan
  • LAST (65534) : Final waypoint of flight plan

4.6.77. fms_airport - Flight management system airport types

  • UNKNOWN (0) : Unknown type of airport
  • AIRPORT (1) : An actual airport
  • BALLOON (2) : A Balloonport
  • SEAPLANE (3) : A Seaplane Base
  • GLIDER (4) : A Glider Port
  • HELIPORT (5) : A Heliport
  • ULTRALIGHT (6) : Ultralight Field
  • FLAG_CUSTOMS ((1U << 8)) : Customs Available
  • FLAG_TOWER ((1U << 9)) : Tower Available
  • FLAG_PUBLIC ((1U << 10)) : Public Use
  • FLAG_CLOSEDIND ((1U << 11)) : Closed Indefinitely
  • FLAG_CLOSEDPERM ((1U << 12)) : Closed Permenantly
  • FLAG_JETA ((1U << 13)) : JET-A Available
  • FLAG_100LL ((1U << 14)) : 100LL Available
  • FLAG_MOGAS ((1U << 15)) : Oxygen Available
  • FLAG_BEACON ((1U << 16)) : Beacon Present
  • FLAG_AFMAJOR ((1U << 17)) : Major Airframe
  • FLAG_AFMINOR ((1U << 18)) : Minor Airframe
  • FLAG_PPMAJOR ((1U << 19)) : Powerplant Major
  • FLAG_PPMINOR ((1U << 20)) : Powerplant Minor
  • FLAG_OXYGEN ((1U << 21)) : Oxygen Available
  • FLAG_MILITARY ((1U << 22)) : Military

4.6.78. fms_rwy - Flight management system runway parameters and flags

  • SURF_UNKNOWN (0) : Unknown Surface
  • SURF_ASPHALT ((1U << 0)) : Asphalt
  • SURF_CONC ((1U << 1)) : Concrete
  • SURF_SNOW ((1U << 2)) : Snow
  • SURF_ICE ((1U << 3)) : Ice
  • SURF_MATS ((1U << 4)) : Mats
  • SURF_TREATED ((1U << 5)) : Oiled
  • SURF_GRAVEL ((1U << 6)) : Gravel
  • SURF_TURF ((1U << 7)) : Grass / Sod
  • SURF_DIRT ((1U << 8)) : Natural Soil
  • SURF_WATER ((1U << 9)) : Water Runway
  • SURF_OTHER ((1U << 10)) : Wood
  • SURF_MATERIAL_MASK (0x7ff) : Mask for surface material
  • SURF_EXCL ((1U << 11)) : Excellent Condition
  • SURF_GOOD ((1U << 12)) : Good Condition
  • SURF_FAIR ((1U << 13)) : Fair Condition
  • SURF_POOR ((1U << 14)) : Poor Condition
  • SURF_FAILED ((1U << 15)) : Failed Condition
  • SURF_COND_MASK (0xf800) : Mask for surface material
  • LIGHTS_HIGH ((1U << 16)) : Edge Lights High
  • LIGHTS_MED ((1U << 17)) : Medium Edge Lights
  • LIGHTS_LOW ((1U << 18)) : Low Edge Lights
  • LIGHTS_NSTD ((1U << 19)) : Non-Standard
  • LIGHTS_NONE ((1U << 20)) : No Edge Lights
  • LIGHTS_OTHER ((1U << 21)) : Other edge lights
  • RIGHT_HAND ((1U << 22)) : Right Hand Traffic

4.6.79. fms_container - Flight management system container types

  • UNKNOWN (0) : Unspecified or unknown container
  • NONE (1) : No container
  • VICTOR (2) : VOR Airway
  • JET (3) : Jet Airway
  • AMBER (4) : Amber Airway
  • BLUE (5) : Blue Airway
  • GREEN (6) : Green Airway
  • RED (7) : Red Airway
  • Q (8) : RNAV Q Routes
  • T (9) : RNAV T Routes
  • STAR (10) : Standard Arrival Procedure
  • DP (11) : Standard Departure Procedure
  • APP (12) : Instrument Approach
  • RWY (13) : Airport Runway Surface Selection

4.6.80. fms_airspace - Flight management system airspace types and flags

  • CLASS_A (A) : Class A Airspace
  • CLASS_B (B) : Class B Airspace
  • CLASS_C (C) : Class C Airspace
  • CLASS_D (D) : Class D Airspace
  • AGLFLAG ((1U << 20)) : If present in positive numbers, Airspace is relative to ground level
  • AAFLAG ((1U << 21)) : If present, in positive number, airspace is capped by the airspace above

4.6.81. osk_key - On screen keyboard keys

  • 0 (48) : Character 0
  • 1 (49) : Character 1
  • 2 (50) : Character 2
  • 3 (51) : Character 3
  • 4 (52) : Character 4
  • 5 (53) : Character 5
  • 6 (54) : Character 6
  • 7 (55) : Character 7
  • 8 (56) : Character 8
  • 9 (57) : Character 9
  • A (65) : Character A
  • B (66) : Character B
  • C (67) : Character C
  • D (68) : Character D
  • E (69) : Character E
  • F (70) : Character F
  • G (71) : Character G
  • H (72) : Character H
  • I (73) : Character I
  • J (74) : Character J
  • K (75) : Character K
  • L (76) : Character L
  • M (77) : Character M
  • N (78) : Character N
  • O (79) : Character O
  • P (80) : Character P
  • Q (81) : Character Q
  • R (82) : Character R
  • S (83) : Character S
  • T (84) : Character T
  • U (85) : Character U
  • V (86) : Character V
  • W (87) : Character W
  • X (88) : Character X
  • Y (89) : Character Y
  • Z (90) : Character Z
  • PREV (60) : Previous position or <
  • NEXT (62) : Next position or >
  • DEG (127) : Degrees
  • DIRECTTO (128) : Direct To
  • ENT (129) : Enter

4.6.82. chart_type - Instrument procedure and airport chart/diagram types

  • APPROACH (1) : Instrument Approach
  • DEPARTURE (2) : Instrument Departure
  • ARRIVAL (3) : Instrument Arrival
  • DIAGRAM (4) : Airport Diagram
  • HOTSPOT (5) : Hot Spot
  • LAHSO (6) : Land and Hold Short
  • ALTMIN (7) : Alternate Minimums
  • OBSDEP (8) : Obstacle Departure Procedure
  • DEPAAU (9) : Departure / Attention All Users
  • SUPPLEMENT (255) : Supplemental Data

4.6.83. db_param - Database parameter identifiers and formats

  • FORMAT_MASK ((0xffU << 24)) : Mask for Format portion
  • FORMAT_INT ((0 << 24)) : 32-bit 2's complement signed integer
  • FORMAT_FLOAT ((1U << 24)) : IEEE 754 floating point number
  • FORMAT_STRING ((2U << 24)) : Optionally NULL terminated string
  • AIRPORT (0) : Airport Name
  • SERVICE (1) : Service name (e.g. ATIS, AWOS, TOWER, APPROACH, DEPARTURE, CENTER, CLEARANCE, GROUND)
  • FREQKHZ_DEPRECATED (2) : Frequency in Khz
  • COMMENT (3) : Comment associated with Frequency
  • PHONE (4) : Phone number
  • SECONDARY (5) : If a value is secondary, it's priority (lower is higher priority)
  • FIXNAME (6) : Name of Fix
  • LATITUDE (7) : Latitude
  • FLAGS (8) : Generic flags
  • CONTAINER (9) : Name of airway, arrival, star or other container
  • CTYPE (10) : Type of container
  • WTYPE (11) : Type of FIX/Waypoint
  • INBOUND (12) : Inbound magnetic course
  • OUTBOUND (13) : Outbound magnetic course in
  • MAGADJ (14) : Magnetic Adjustment
  • ALTITUDE (15) : Altitude (MSL)
  • LONGNAME (16) : Full name of fix or airport or airspace
  • LONGITUDE (17) : Longitude
  • APTTYPE (18) : Type of landing facility
  • OPCOUNT (19) : Operations Count per year
  • CITY (20) : Associated City
  • STATE (21) : Associated State
  • COUNTRY (22) : Associated Country
  • RWYNAME (23) : Runway Name
  • RWYSIZE (24) : Length in bottom 20 bits, Width in top 12 bits
  • RWYLAT (25) : Lat of runway End
  • RWYLON (26) : Lon of runway End
  • RWYTHRS (27) : Displaced Threshold
  • RWYSURF (28) : Runway Surface
  • RWYALIGN (29) : Runway true alignment (in degrees)
  • RWYELV (30) : Runway threshold elevation
  • FLOOR (31) : Signed integer altitude floor in feet
  • CEIL (32) : Altitude ceiling in feet
  • AIRNAME (33) : Name / Class of airspace
  • ALTAGL (34) : Altitude (AGL)
  • OBSLIGHT (35) : Obstacle Lighting (from DOF)
  • MOCA (36) : Minimum Crossing Altitude
  • MCA (37) : Minimum Crossing Altitude
  • MCAR (38) : Minimum Crossing Altitude (Reverse)
  • MEA (39) : Minimum Enroute Altitude
  • MEAR (40) : Minimum Enroute Altitude (Reverse)
  • GMEA (41) : (GNSS) Minimum Enroute Altitude
  • GMEAR (42) : (GNSS) Minimum Enroute Altitude (Reverse)
  • MAXAA (43) : Maximum Authorized Altitude
  • CLONGNAME (44) : Long Name of container
  • PROCNAME (45) : Procedure or Chart Name
  • CHARTTYPE (46) : Type of Chart
  • IMAGENAME (47) : Image Name for Procedure
  • TOP (48) : Top location in 1/10000 of a percent of full scale
  • RIGHT (49) : Right location in 1/10000 of a percent of full scale
  • BOTTOM (50) : Bottom location in 1/10000 of a percent of full scale
  • LEFT (51) : Left location in 1/10000 of a percent of full scale
  • XLOC (52) : X location in 1/10000 of a percent of full scale
  • YLOC (53) : Y location in 1/10000 of a percent of full scale
  • ORIENTATION (54) : Orientation in 1/10000 of a degree
  • PROXIMITY (55) : Proximity of closest neighbor
  • FREQMHZ (56) : Frequency

4.6.84. db_hashfunc - Database hash functions

  • IDENT (1) : Alphanumeric Identifier
  • INT (2) : Integer Number

4.6.85. devtype - XFS device types

  • MCP (1) : Master Control Program
  • ADC (2) : Air Data Computer Only
  • AHRS (3) : Attitude Heading Reference System Only
  • ADAHRS (4) : ADC and AHRS Combined
  • SIM (5) : Simulated Data
  • DSU (6) : Data Storage Unit -- Records Data
  • FD (7) : Flight Director
  • AP (8) : Automatic Pilot
  • FMS (9) : Flight Management System
  • PDU (10) : Power Distribution Unit
  • TRIGGER (11) : Event Trigger Unit
  • QAR (12) : Quick Access Recorder
  • UI (13) : User Interface Device (but not flight display)
  • COM (14) : Communication Radio
  • NAV (15) : Navigation Radio
  • AUDIOPANEL (16) : Audio Panel
  • XPDR (17) : Transponder
  • DAU (18) : Data Acquisition Unit (e.g. Engine)
  • XFD (19) : Generic Flight Display
  • SYNSENSOR (20) : Synthetic Sensor
  • EFIS (21) : Integrated Standby EFIS
  • OVERLAY (22) : Display overlay (e.g. System or Moving Map)
  • SERVO (23) : Generic Servo Unit
  • AIRFRAME (24) : Airframe specific description
  • GPIO (25) : Generic GPIO Interface
  • BRIDGE (26) : Protocol Bridge
  • PROPGOV (27) : Propeller Governor control
  • DATALINK (28) : Generic Data Link
  • HAT (29) : Device for measuring height above terrain

4.6.86. suip_cmd - Serial User Interface Protocol commands

  • DATATX (0x0001) : Send data to specific address.
  • LONGPRESSTIME (0x0002) : How many milliseconds for a Long press (16-bit unsigned value in data)
  • GENINC (0x0003) : Generic Encoder Increase
  • GENDEC (0x0004) : Generic Encoder Decrease
  • GENPUSH (0x0005) : Generic Encoder or Button Push
  • GENLONGPUSH (0x0006) : Generic Encoder or Button Long Push
  • GENRELEASE (0x0007) : Generic Encoder or Button Release
  • IDENTREQ (0x000c) : Identify Device connected
  • IDENTREP (0x000d) : Return identity to CPU (data is null terminated string)
  • BRIGHTNESS (0x000e) : Addr is which device to change brightness (0 for all), data is 16 bits 0 (dark) to 65535 (bright)
  • ISALIVE (0x000f) : Periodic message sent to indicate link is alive. Address is 0
  • CONFIG (0x0010) : Device specific configuration. Address is device specific
  • QUERY (0x0011) : Device specific query. Address is device specific
  • REPLY (0x0012) : Device specific reply. Address is device specific
  • DEBUG (0x0000) : Fake message which has debug info in it

4.6.87. touch_event - Touch event activities

  • UNASSIGNED (0) : Touch event has not been assigned yet
  • ORPHAN (1) : Touch did not begin within target
  • LOST (2) : Touch did not remain within target
  • ABANDON (3) : Touch released outside target
  • PRESS (4) : Pressing on a touch surface
  • DRAG (5) : Drag to a new location
  • PINCH (6) : Two related touches dragged to new positions
  • RELEASE (255) : Releasing from a touch surface

4.6.88. gpio_output - General purpose I/O output states

  • NULL (0x00) : NO, GPIO port not available / not installed
  • FLOAT (0x01) : FL, No pull up or pull down
  • PULLDOWN (0x02) : PD, pulldown ~ 2.2k
  • PULLUP (0x03) : PU, pullup ~ 2.2k
  • LOW (0x04) : OL, Drive output value low
  • HIGH (0x05) : OH, Drive output value high
  • PULL_PWM (0x06) : PP, Drive output as PWM/DAC through pullup/down
  • PWM (0x07) : PW, Drive output as PWM/DAC
  • FAULT ((1U << 3)) : OF, Fault condition (Rx only), Clear fault (Tx only)

4.6.89. gpio_input - General purpose I/O input states

  • NULL (0x00) : NI, GPIO port not available / not installed
  • LOW (0x01) : IL, Read value is low
  • HIGH (0x02) : IH, Read value is high
  • FAULT (0x03) : IF, Fault condition (Rx only), Clear fault (Tx only)

4.6.90. gpio_feature - General purpose I/O feature flags

  • ANALOG ((1U << 0)) : Is analog requested

4.6.91. gdl90_event - GDL-90 event Codes

  • INVALID (0) : Invalid sequence
  • BADCHECKSUM (1) : Checksum invalid
  • OTHER (2) : Other event - with raw data
  • HEARTBEAT (3) : Heartbeat event
  • OWNSHIP (4) : Ownship event (see traffic portion)
  • TRAFFIC (5) : Traffic event
  • GEOALT (6) : Geo Altitude for Ownship
  • UPLINK (7) : Generic Uplink Event

4.6.92. gdl90_emergency - GDL-90 Emergency and priority codes

  • NONE (0) : No emergency
  • GENERAL (1) : General unspecified emergency
  • MEDICAL (2) : Medical emergency
  • MINIMUM_FUEL (3) : Minimum fuel
  • NORDO (4) : No Communications
  • HIJACK (5) : Unlawful interference
  • DOWNED (6) : Downed aircraft

4.6.93. gdl90_emitter - GDL-90 Traffic Emitter Category

  • NO_INFO (0) : No information available
  • LIGHT (1) : Under 15,500 lbs
  • SMALL (2) : 15,500 lbs to 75,000 lbs
  • LARGE (3) : 75,000 to 300,000 lbs
  • HIGH_VORTEX (4) : B757 etc
  • HEAVY (5) : Over 300,000 lbs
  • MANUEVERABLE (6) : Over 5G acceleration
  • ROTORCRAFT (7) : Rotary Wing Aircraft
  • GLIDER (9) : Glider or Sailplane
  • AIRSHIP (10) : Lighter than air
  • SKYDIVER (11) : Sky diver or parachutist
  • ULTRALIGHT (12) : Ultralight / Hang Glider
  • UAV (14) : Unmanned aircraft
  • SPACE (15) : Space / Transatmospheric vehicle
  • EMERGENCY (17) : Surface / emergency vehicle
  • SERVICE (18) : Surface / service vehicle
  • POINTOBSTACLE (19) : Point Obstacle (including tethered balloon)
  • CLUSTEROBSTACLE (20) : Cluster of obstacles
  • LINEOBSTACLE (21) : Line of obstacles

4.6.94. gdl90_traffic_alert - GDL-90 Traffic Alert Status

  • NONE (0) : No alert active for target
  • ALERT (1) : Alert active for target

4.6.95. gdl90_traffic_addr - GDL-90 Traffic Address Type

  • ADSB_ICAO (0) : ICAO Assigned
  • ADSB_SELF (1) : Self Assigned
  • TISB_ICAO (2) : ICAO Assigned
  • TISB_TRACK_FILE (3) : Track File ID
  • SURFACE_VEHICLE (4) : Surface Vehicle
  • GROUND_STATION_BEACON (5) : Ground Station Beacon

4.6.96. gdl90_heartbeat_status1 - GDL-90 Heartbeat First Status Byte Bitmask

  • GPS_POS_VALID ((1U << 7)) : Position is available for ADS-B Tx
  • GDL90_MAINT_REQD ((1U << 6)) : GDL 90 Maintenance is Required
  • IDENT_TALKBACK ((1U << 5)) : IDENT Talkback
  • ADDR_TALKBACK ((1U << 4)) : Address Type Talkback
  • GPS_BATT_LOW ((1U << 3)) : GPS Battery Low
  • RATCS ((1U << 2)) : ATC Services Talkback
  • UAT_INITIALIZED ((1U << 0)) : GDL90 is initialized

4.6.97. gdl90_heartbeat_status2 - GDL-90 Heartbeat Second Status Byte Bitmask

  • CSA_REQUESTED ((1U << 6)) : CSA has been requested
  • CSA_NOT_AVAILABLE ((1U << 5)) : CSA not available at this time
  • UTC_TIMING_VALID ((1U << 0)) : UTC timing is valid

4.6.98. gdl90_track_status - GDL-90 status of traffic track value

  • INVALID (0) : trackheading field is meaningless
  • TRUETRACK (1) : trackheading field represents true track
  • MAGHDG (2) : trackheading field represents magnetic heading
  • TRUEHDG (3) : trackheading field represents true heading
  • CNEXRAD (1) : CONUS NEXRAD
  • RNEXRAD (2) : Regional NEXRAD
  • GENTEXT (3) : Generic Text
  • SUA (4) : Special Use Airspace Status
  • ICINGLOW (5) : Low Level Forecast Icing Product
  • ICINGHIGH (6) : High Level Forecast Icing Product
  • TURBLOW (7) : Low Level Forecast Turbulence
  • TURBHIGH (8) : High Level Forecast Turbulence
  • LIGHTNING (9) : Lightning
  • CLOUDTOPS (10) : Cloud Tops
  • GAIRMET (11) : Graphical AIRMET Outline
  • SIGMETOUTLINE (12) : SIGMET Outline
  • SIGMETTEXT (13) : SIGMET Text
  • AIRMETOUTLINE (14) : AIRMET Outline
  • AIRMETTEXT (15) : AIRMET Text
  • NOTAMOUTLINE (16) : NOTAM/TFR Outline
  • NOTAMTEXT (17) : NOTAM/TFR Text
  • CWAOUTLINE (18) : Center Weather Advisory Outline
  • CWATEXT (19) : Center Weather Advisory Text

4.6.100. fisb_geometry - SRT-047/DO-358 datalink FIS-B geometries

  • 3DPG_MSL (3) : 3D Polygon MSL Altitude
  • 3DPG_AGL (4) : 3D Polygon AGL Altitude
  • CP_MSL (7) : Circular Prism MSL Altitude
  • CP_AGL (8) : Circular Prism AGL Altitude
  • 3DPT_AGL (9) : 3D Point AGL Altitude
  • 3DPT_MSL (10) : 3D Point MSL Altitude
  • 3DPL_MSL (11) : 3D Polyline MSL Altitude
  • 3DPL_AGL (12) : 3D Polyline AGL Altitude

4.6.101. gblock_res - SRT-047/DO-358 Global Block Resolution

  • HIGH (1) : High Resolution (1x)
  • MEDIUM (5) : Medium Resolution (5x)
  • LOW (9) : Low Resolution (9x)

4.6.102. hid_event - Human Interface Device Events

  • NONE (0) : No event has occured. Should still be called frequently if no other events happen
  • ICC (1) : Inner Counter Clockwise
  • IC (2) : Inner Clockwise
  • OCC (3) : Outer Counter Clockwise
  • OC (4) : Outer Clockwise
  • KPUSH (5) : Push on knob
  • BPUSH (6) : Button Push
  • KREL (7) : Knob Release
  • BREL (8) : Button Release

4.6.103. ethertun_dlc - Special data length field parameters for ethernet tunnel of CAN

  • TIMESTAMP ((1U << 7)) : Timestamp field present

4.6.104. analog_avg_feature - Features for analog averaging

  • NONE (0) : Normal Average
  • HEADING (1) : Average range 0-360 with wrapping
  • PITCH (2) : Average range -90.0 to 90.0 with wrapping
  • ROLL (3) : Average range -180.0 to 180.0 with wrapping

4.6.105. milstd1553 - Maximum sequence number for MIL-STD-1553 over ethernet

  • SEQNO_MASK (0x3fff) : Max Sequence number

4.6.106. milstd1553_frame_flag - Frame flags for MIL-STD-1553 frames

  • STATUS1 ((1U << 0)) : Status1 is Valid
  • STATUS2 ((1U << 1)) : Status2 is Valid
  • ADDR1 ((1U << 2)) : Rtaddr1 and Subaddr1 are Valid
  • ADDR2 ((1U << 3)) : Rtaddr2 and Subaddr2 are Valid
  • MODECODE ((1U << 4)) : Modecode is Valid
  • MAILBOX ((1U << 15)) : Treat this message as a mailbox prototype

4.6.107. milstd1553_rtaddr - Remote terminal addresses for MIL-STD-1553

  • TRANSMIT ((1U << 7)) : This command has transmit bit set (if not present, receive bit)
  • MASK (0x1f) : Mask for station vs flags
  • ALL (0x1f) : All Stations
  • UNSPEC (0x20) : RT is unspecified

4.6.108. milstd1553_subaddr - Subaddresses for remote terminals for MIL-STD-1553

  • MODECODE0 (0x0) : Mode Code (0)
  • MODECODE31 (0x1f) : Mode Code (31)
  • UNSPEC (0x20) : Subaddress is unspecified

4.6.109. milstd1553_modecode - MIL-STD-1553 special mode codes

  • DYNBUSCTRL (0x00) : Dynamic Bus Control
  • SYNC (0x01) : Synchronize
  • TXSTATW (0x02) : Transmit Status Word
  • SELFTEST (0x03) : Initiate Self Test
  • TXSD (0x04) : Transmitter Shutdown
  • OVTXSD (0x05) : Override Transmitter Shutdown
  • INHIBIT (0x06) : Inhibit Terminal Flag
  • OVINHIBIT (0x07) : Override Inhibit Terminal Flag
  • RESET (0x08) : Reset Remote Terminal
  • TXVECTW (0x10) : Transmit Vector Word
  • SYNCWDATA (0x11) : Synchronize (with Data) (R)
  • TXLASTCW (0x12) : Transmit Last Command Word
  • TXBITW (0x13) : Transmit BIT Word
  • SELTXSD (0x14) : Selected Transmitter Shutdown (R)
  • OVSELTXSD (0x15) : Override Selected Transmitter Shutdown (R)
  • UNSPEC (0x20) : Mode code is unspecified

4.6.110. milstd1553_status - MIL-STD-1553 status bits

  • RTMASK (0x1f) : Mask for station vs flags
  • MSGERROR ((1U << 15)) : Message Error
  • INSTRMNT ((1U << 14)) : Instrumentation
  • SVCREQ ((1U << 13)) : Service Request
  • BRDCSTRX ((1U << 9)) : Broadcast Received
  • BUSY ((1U << 8)) : Busy
  • SUBSYSFLAG ((1U << 7)) : Subsystem Flag
  • DYNBUSCTRLAC ((1U << 6)) : Dynamic Bus Control Accept
  • TERMFLAG ((1U << 5)) : Terminal Flag

4.6.111. arinc429_speed - ARINC-429 baud rates

  • FAST (100000) : ARINC-429 High Speed
  • SLOW (12500) : ARINC-429 Low Speed

4.6.112. arinc429_bcd - ARINC-429 Binary Coded Decimal

  • PLUS ((0 << 29)) : SSM Positive Number
  • NCD ((1 << 29)) : SSM No Computed Data
  • FT ((2 << 29)) : SSM Functional Test
  • MINUS ((3 << 29)) : SSM Negative Number

4.6.113. arinc429_dd - ARINC-429 Discrete Data

  • NORM ((0 << 29)) : SSM Normal Operation
  • NCD ((1 << 29)) : SSM No Computed Data
  • FT ((2 << 29)) : SSM Functional Test
  • FAIL ((3 << 29)) : SSM Failure Warning

4.6.114. arinc429_bnr - ARINC-429 Binary Number

  • FAIL ((0 << 29)) : SSM Failure Warning
  • NCD ((1 << 29)) : SSM No Computed Data
  • FT ((2 << 29)) : SSM Functional Test
  • NORM ((3 << 29)) : SSM Normal Operation
  • PLUS ((0 << 28)) : SM Positive Number
  • MINUS ((1 << 28)) : SM Negative Number

4.6.115. canaero_datatype - CANAERO datatypes and encodings

  • NODATA (0) : No data type
  • ERROR (1) : Emergency event data type
  • FLOAT (2) : Single precision IEE-754
  • LONG (3) : 2's complement integer
  • ULONG (4) : Unsigned integer
  • BLONG (5) : Collection of 32 individual bits
  • SHORT (6) : 2's complement short integer
  • USHORT (7) : Unsigned 16-bit integer
  • BSHORT (8) : Collection of 16 individual bits
  • CHAR (9) : 2's complement char integer
  • UCHAR (10) : unsigned 8-bit integer
  • BCHAR (11) : Collection of 8 individual bits
  • SHORT2 (12) : 2 x 2's complement short integer
  • USHORT2 (13) : 2 x unsigned 16-bit integer
  • BSHORT2 (14) : 2 x collection of 16 individual bits
  • CHAR4 (15) : 4 x 2's complement char integer
  • UCHAR4 (16) : 4 x unsigned 8-bit
  • BCHAR4 (17) : 4 x collection of 8 individual bits
  • CHAR2 (18) : 2 x 2's complement char integer
  • UCHAR2 (19) : 2 x unsigned 8-bit integer
  • BCHAR2 (20) : 2 x collection of 8 individual bits
  • MEMID (21) : Memory ID for upload/download
  • CHKSUM (22) : Checksum for upload/download
  • ACHAR (23) : ASCII Character
  • ACHAR2 (24) : 2x ASCII Character
  • ACHAR4 (25) : 4x ASCII Character
  • VARIABLE3 (100) : 17 to 24-bits of signed 2's complement integer
  • UVARIABLE3 (101) : 17 to 24-bits of unsigned integer

4.6.116. parambuf_interpflag - Parameter buffer interpretation flags

  • NONE (0) : No interpretation flags
  • STRICT ((1U << 0)) : Confidence must exactly match minconfidence
  • CROSSFILL ((1U << 1)) : Crossfill equivalent values from appropriate better scoring peers
  • PROMISC ((1U << 2)) : Interpret from all sources and do not attach to a single one
  • OPTIONAL ((1U << 3)) : The presence of this parameter is not required for normal operation

4.6.117. parambuf_flag - Parameter buffer state flags

  • NONE (0) : No flags
  • VALID ((1U << 0)) : Set to true by receive logic when paramter buffer is valid
  • UPDATED ((1U << 1)) : Set by receive logic when paramter buffer has been updated
  • LINKED ((1U << 2)) : When this flag is set, this parameter buffer has been linked in a parameter set

4.6.118. serial_dbits - Serial Data Bits

  • DB8 (0) : Eight Data Bits
  • DB7 (1) : Seven Data Bits

4.6.119. serial_parity - Serial Data Parity

  • NONE (0) : No Parity Bit
  • ODD (1) : Odd Parity Bit
  • EVEN (2) : Even Parity Bit

4.6.120. serial_sbits - Serial Stop Bits

  • SB1 (0) : One Stop Bit
  • SB2 (1) : Two Stop Bits
  • DISCONNECTED (-1) : Interface is currently not connected
  • STATELESS (0) : Interface does not track state
  • CONNECTED (1) : Interface is currently connected

4.6.122. object_factory_flag - Object Factory Flags

  • VIRTUAL ((1 << 0)) : Virtual objects cannot be directly instantiated -- only their non-virtual children
  • OSSPECIFIC ((1 << 1)) : Objects defined within the operating system abstraction may be absent or have different parameters on other O/S selections
  • OPTIONAL ((1 << 2)) : Optional object factories can be ignored if their parent object types have no registered factory
  • REGISTERED ((1 << 3)) : If present, this object factory has been registered within the list of valid object types
  • FOUNDLINEAGE ((1 << 4)) : If present, this object factory has found its full lineage up to the root OBJECT parent

4.6.123. scb_flag - Software Circuit Breaker Flags

  • NONE (0) : Application running within normal paramters
  • HIGHMEM ((1 << 0)) : Application has used unexpectedly high portion of memory
  • HIGHCPU ((1 << 1)) : Application has used unexpectedly high portion of CPU
  • HIGHBW ((1 << 2)) : Application has used unexpectedly high portion of network bandwidth

4.6.124. priv_proto - Privacy Protocols

  • NONE (0) : No privacy protocol
  • DES (1) : Data Encryption Standard
  • AES (2) : 128-Bit Advanced Encryption Standard
  • AES192 (3) : 192-Bit Advanced Encryption Standard
  • AES256 (4) : 256-Bit Advanced Encryption Standard

4.6.125. crc16_poly - CRC-16 Polynomials

  • POSTXOR ((1 << 16)) : XOR Block data after table lookup rather than before (nonstandard for GDL-90)
  • CCITT (0x1021) : GDL-90 (when in conjunction with POSTXOR flag), CRC-16 CCITT
  • ANSI (0x8005) : ANSI X3.28, USB, MODBUS and others

4.6.126. a661_widgetid - ARINC-661 Widget IDs

  • NOWIDGET (0) : No selected widget

4.6.127. a661_layerid - ARINC-661 Layer IDs

4.6.128. a661_color - ARINC-661 Color Indices

4.6.129. a661 - ARINC-661 Special Values

  • FALSE (0x00) : False
  • TRUE (0x01) : True
  • UNSELECTED (0x00) : Not selected
  • SELECTED (0x01) : Selected
  • TRUE_WITH_VALIDATION (0x02) : True and Validated
  • BEGIN_BLOCK (0xB0) : Start keyword opening a runtime block of information
  • END_BLOCK (0xD0) : Keyword ending a block of runtime information
  • CMD_SET_PARAMETER (0xCA02) : Set a parameter on a widget
  • CMD_UA_REQUEST (0xCA03) : Set parameter
  • NOTIFY_WIDGET_EVENT (0xCC01) : Received Widget Event
  • NOTIFY_LAYER_EVENT (0xCC02) : Received Layer Event
  • NOTIFY_EXCEPTION (0xCC03) : Received Exception Event
  • REQ_LAYER_ACTIVE (0xDA01) : Request a layer become active
  • REQ_LAYER_INACTIVE (0xDA02) : Request a layer become inactive
  • REQ_LAYER_VISIBLE (0xDA04) : Request a layer become the visible layer
  • REQ_CURSOR_ON_WIDGET (0xDA05) : Request cursor be snapped to a widget
  • REQ_FOCUS_ON_WIDGET (0xDA03) : Request focus be snapped to a widget
  • ERR_BAD_COMMAND (0xF001) : Erroneous command
  • ERR_PROCESS_OVERLOAD (0xF006) : Inability to complete processing
  • ERR_RENDERING_OVERLOAD (0xF007) : Inability to complete rendering
  • ERR_SET_ABORTED (0xF003) : Erroneous set command
  • ERR_UA_REQUEST_ABORTED (0xF004) : Erroneous UA Request
  • NOTE_CYCLIC_ACTIVATION (0xDC82) : Periodic Indication that Layer is Active
  • NOTE_LAYER_IS_ACTIVE (0xDC02) : Layer Activated by CDS and Reinitialize Data
  • NOTE_LAYER_IS_INACTIVE (0xDC03) : Layer Deactivated by CDS
  • NOTE_REINIT_LAYER_DATA (0xDC01) : CDS Requests Data Layer Initialization
  • NOTE_CONNECTOR_DATA (0xDC86) : Parametric Data Update
  • EVT_ANIMATION_STATUS_CHANGE (0xE509) : Animation Status has completed (1 byte)
  • EVT_CLICKED (0xE1D1) : Item has been clicked
  • EVT_CURSOR_ENTER (0xE300) : Cursor enters active area
  • EVT_CURSOR_EVENT (0xE305) : Event from cursor event extension
  • EVT_CURSOR_EXIT (0xE320) : Cursor exits active area
  • EVT_CURSOR_INSIDE (0xE310) : Cursor inside active area
  • EVT_CURSOR_POS_CHANGE (0xE010) : Cursor position has changed
  • EVT_GESTURE_DIR_FLICK (0xE508) : Direction of one or more points quickly moved in a direction
  • EVT_DOUBLE_CLICKED (0xE1D2) : Double click event
  • EVT_GESTURE_DRAG (0xE506) : One or more points move in a direction
  • EVT_EDITBOX_OPENED (0xE110) : Edit box has been opened for entry
  • EVT_FIRST_VIS_ENTRY_CHANGE (0xE020) : First visible entry in a list has changed
  • EVT_GESTURE_FLICK (0xE507) : Velocity of one or more points quickly moved in a direction
  • EVT_FRAME_POS_CHANGE (0xE030) : Change in X/Y Position of Frame
  • EVT_GESTURE_DOUBLE_TAP (0xE502) : Two taps in quick succession and close proximity
  • EVT_GESTURE_TAP (0xE501) : Single tap and release
  • EVT_INCREMENT (0xE006) : Device Increment
  • EVT_ITEM_SYNCHRONIZATION (0xE150) : Map Item Synchronization
  • EVT_ITEM_IN_BOUNDS (0xE141) : List of in-bounds map items
  • EVT_ITEM_OUT_OF_BOUNDS (0xE140) : List of out-of-bounds map items
  • EVT_KEY (0xE005) : Virtual Keyboard KeyPress
  • EVT_MULT_SELECTION (0xE058) : Multiple entry list (extension) selection entry
  • EVT_OFFSCREEN (0xE0E0) : Map element has gone off screen
  • EVT_ONSCREEN (0xE0E1) : Map element has come on screen
  • EVT_GESTURE_PINCH (0xE504) : Pinch Gesture
  • EVT_POPUP_CLOSED (0xE040) : Popup menu or button closed
  • EVT_POPUP_PANEL_CLOSED (0xE120) : Popup panel closed
  • EVT_GESTURE_PRESS_AND_HOLD (0xE503) : Area pressed and held
  • EVT_PRESSED (0xE1D3) : Area pressed
  • EVT_RELEASED (0xE1D4) : Area released
  • EVT_RIGHT_CLICKED (0xE1D5) : Area right clicked
  • EVT_GESTURE_ROTATE (0xE505) : Rotation gesture
  • EVT_SEL_ENTRY_CHANGE (0xE050) : Selection entry has changed
  • EVT_SELECTION (0xE060) : Item has been selected
  • EVT_SELECTION_MAP (0xE068) : Map location has been selected
  • EVT_STATE_CHANGE (0xE070) : Item state has changed
  • EVT_STRING_CHANGE (0xE080) : String value has been changed but not confirmed or aborted
  • EVT_STRING_CHANGE_ABORTED (0xE090) : String value change has been canceled
  • EVT_STRING_CONFIRMED (0xE0A0) : String value change has been confirmed
  • EVT_TABBED_PANEL_CHANGE (0xE0B0) : Selected tabbed panel has changed
  • EVT_TOUCH (0xE500) : A touch has taken place
  • EVT_VALUE_CHANGE (0xE0C0) : Slider value has changed
  • EVT_VISIBLE_CHILD (0xE0D0) : Visible child within paging container has changed
  • EVT_VISIBLE_CHILD_INDEX (0xE0D1) : Index of visible child within paging container has changed
  • EVT_WATCHDOG_EXPIRED (0xE200) : Watchdog has expired
  • EVT_WATCHDOG_NORMAL (0xE210) : Watchdog status is normal
  • EVT_ANY (0xFFFF) : XFS-Specific Any Event
  • STRING (0xB490) : String value parameter
  • STRING_ARRAY (0xB4A0) : Collection of NUL-separated and terminated string values parameter
  • SELECTED_ENTRY (0xB430) : Selected entry within a list
  • NUMBER_OF_ENTRIES (0xB2A0) : Number of entries within a list
  • VISIBLE_CHILD (0xB540) : Visible child page/mutex container
  • ENTRY_VALID (0xB570) : Entry has been validated when non-zero
  • COLOR_INDEX (0xB160) : Index of Color to be used for border
  • FILL_INDEX (0xB1E0) : Index of Color to be used for fill
  • ENABLE (0xB180) : Enable for interaction
  • VALUE (0xB520) : Floating Point Numeric Value
  • START_ANGLE (0xB480) : 32-bit signed numeric value for starting angle
  • END_ANGLE (0xB1B0) : 32-bit signed numeric value for ending angle
  • VISIBLE (0xB530) : Is widget visible
  • INNER_STATE_CHECK (0xB244) : Is toggle checked
  • INNER_STATE_TOGGLE (0xB258) : Is toggle selected
  • EN_DEFSTR (0xBA11) : Collins Extension for Edit Number to show default string
  • SIZE_X (0xB450) : Width of widget
  • SIZE_Y (0xB460) : Height of widget

4.6.130. com_secmode - Communication Security Mode

  • TD (1) : TD
  • PT (2) : Plain Text
  • CT (7) : Cypher Text
  • INVALID (8) : Invalid Reserved
  • RV (14) : RV

4.6.131. com_band - Communication Band

  • UNKNOWN (0) : Unknown communication band
  • VHFFM (1) : Very High Frequency with Frequency Modulation
  • VHFAM (2) : Very High Frequency Amplitude Modulation
  • UHFFM (3) : Ultra High Frequency
  • UHFAM (4) : Ultra High Frequency
  • P25A (5) : Project 25 Analog
  • P25D (6) : Project 25 Digital
  • P25T (7) : Project 25 Trunk Mode
  • TSM (8) : Trellisware Scalable Mobile Ad-hoc NETworking
  • SATCOM (9) : Satellite Communication
  • SINCGARS (10) : SINCGARS Frequency Hop Frequencies
  • HFAM (11) : High Frequency Ampltitude Modulation

4.6.132. com_bandmask - Supported Communication Band Mask

  • VHFFM ((1 << 0)) : Very High Frequency with Frequency Modulation
  • VHFAM ((1 << 1)) : Very High Frequency with Amplitude Modulation
  • UHFFM ((1 << 2)) : Ultra High Frequency with Frequency Modulation
  • UHFAM ((1 << 3)) : Ultra High Frequency with Amplitude Modulation
  • P25A ((1 << 4)) : Project 25 Analog
  • P25D ((1 << 5)) : Project 25 Digital
  • P25T ((1 << 6)) : Project 25 Trunk Mode
  • TSM ((1 << 7)) : Trellisware Scalable Mobile Ad-hoc NETworking
  • SATCOM ((1 << 8)) : Satellite Communication
  • SINCGARS ((1 << 9)) : SINCGARS Frequency Hop Frequencies
  • HFAM ((1 << 10)) : High Frequency

4.6.133. com_sqlmode - Communication Squelch Mode

  • UNKNOWN (0) : Unknown Squelch Mode
  • NONE (1) : Squelch Off
  • SNR (2) : Signal to Noise Ratio
  • TONE (3) : FM Military Tone Squelch System
  • CTCSS (4) : Continuous Tone Coded Squelch System
  • DCS (5) : Digital Code Squelch
  • NAC (6) : Network Access Code P25 Trunk Mode

4.6.134. com_scgopmode - SINCGARS Operational Mode

  • UNKNOWN (0) : Unknown SINCGARS Mode
  • SINGLECHANNEL (1) : Single channel mode is active
  • FREQHOP (2) : Frequency hoping is active
  • FREQHOPMASTER (3) : Frequency hop and is master

4.6.135. percent - Percentage Value

4.6.136. graphic_prim - Graphic Primative

  • POINTS (0) : Vertices in space
  • LINES (1) : Lines between pairs of vertices
  • LINE_LOOP (2) : Connect all vertices into a closed loop
  • LINE_STRIP (3) : Connect all vertices into a single line
  • TRIANGLES (4) : Triangles between sets of three vertices
  • TRIANGLE_STRIP (5) : Connect all vertices into a single strip of triangles
  • TRIANGLE_FAN (6) : Connect all vertices into a fan of triangles

4.7. Parameter Types

This section declares the initial set of XSEDE parameters. Each parameter is defined by a name and a short description. This is followed by the numeric parameter ID. Next, the meanings of the unit and subunit fields are provided, if applicable. and finally the parameter data format and a reference to the appropriate table defining the parameter attribute type.

4.7.1. GOAROUND - Go around requested

  • Parameter ID: %x00.00.00
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: BOOL (See Table 24.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.2. P-ALT - Pressure Altitude

  • Parameter ID: %x00.00.01
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: FT multiplied by 10.

4.7.3. T-ALT - True Altitude

  • Parameter ID: %x00.00.02
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: FT multiplied by 10.

4.7.4. IAS - Indicated Airspeed

  • Parameter ID: %x00.00.03
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: KT multiplied by 100.

4.7.5. CAS - Calibrated Airspeed

  • Parameter ID: %x00.00.04
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: KT multiplied by 100.

4.7.6. CASMSG - Crew Alerting System Message

  • Parameter ID: %x00.00.05
  • Unit Usage: CAS System ID
  • SubUnit Usage: None
  • Format: CASMSG (See Table 32.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.7. THROTPOS - Throttle position

  • Parameter ID: %x00.00.06
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Default Range: SERVO (See Section 4.5.2.1.)

4.7.8. INAIR - Are we in the air (vs. on the ground)

  • Parameter ID: %x00.00.07
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: BOOL (See Table 24.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.9. BARO - Current barometric setting

  • Parameter ID: %x00.00.08
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: INHG multiplied by 1000.

4.7.10. CLTPOS - Collective Position

  • Parameter ID: %x00.00.09
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Default Range: SERVO (See Section 4.5.2.1.)

4.7.11. CLTPOSREQ - A/P Requested Collective Position

  • Parameter ID: %x00.00.0a
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SERVO (See Table 47.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.12. MAGHDG - Magnetic Heading

  • Parameter ID: %x00.00.0b
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Default Range: HDG (See Section 4.5.2.6.)
  • Units: DEG multiplied by 100.

4.7.13. MAGCRS - Magnetic Course (via RNAV)

  • Parameter ID: %x00.00.0c
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Default Range: HDG (See Section 4.5.2.6.)
  • Units: DEG multiplied by 100.

4.7.14. TRUECRS - True Course (via RNAV)

  • Parameter ID: %x00.00.0d
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Default Range: HDG (See Section 4.5.2.6.)
  • Units: DEG multiplied by 100.

4.7.15. MAGDTK - Desired Course (via RNAV)

  • Parameter ID: %x00.00.0e
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Default Range: HDG (See Section 4.5.2.6.)
  • Units: DEG multiplied by 100.

4.7.16. TRUEDTK - Desired course (via RNAV)

  • Parameter ID: %x00.00.0f
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Default Range: HDG (See Section 4.5.2.6.)
  • Units: DEG multiplied by 100.

4.7.17. LAT - Current position latitude

  • Parameter ID: %x00.00.10
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: DEG multiplied by 10000000.

4.7.18. LON - Current position longitude

  • Parameter ID: %x00.00.11
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: DEG multiplied by 10000000.

4.7.19. RNAVALT - Altitude measured by RNAV

  • Parameter ID: %x00.00.12
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: FT multiplied by 10.

4.7.20. ROLL - Current degrees of roll, -18000 being being upside down towards left, 18000 being upside down to the right

  • Parameter ID: %x00.00.13
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Default Range: ROLL (See Section 4.5.2.2.)
  • Units: DEG multiplied by 100.

4.7.21. PITCH - Current degrees of pitch, 9000 being straight up, -9000 being straight down

  • Parameter ID: %x00.00.14
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Default Range: PITCH (See Section 4.5.2.3.)
  • Units: DEG.

4.7.22. YAW - Yaw/Inclination as measured in G force

  • Parameter ID: %x00.00.15
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: G multiplied by 10000.

4.7.23. FUELWTTOT - Computed remaining fuel

  • Parameter ID: %x00.00.16
  • Unit Usage: Fuel System ID/0=Sum of all
  • SubUnit Usage: 0 = current total, 1 = total at end of flight
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: LB multiplied by 100.

4.7.24. RNAVHFOM - Horizontal Figure of Merit

  • Parameter ID: %x00.00.17
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: M multiplied by 100.

4.7.25. RNAVVFOM - Vertical Figure of Merit

  • Parameter ID: %x00.00.18
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: M multiplied by 100.

4.7.26. RNAVHPL - Horizontal Protection Level

  • Parameter ID: %x00.00.19
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: M multiplied by 100.

4.7.27. RNAVVPL - Vertical Protection Level

  • Parameter ID: %x00.00.1a
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: M multiplied by 100.

4.7.28. IASRT - Indicated Airspeed Rate of Change

  • Parameter ID: %x00.00.1b
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: KTPS multiplied by 100.

4.7.29. KBDSEL - Activate the named on-screen keyboard or none if empty

  • Parameter ID: %x00.00.1c
  • Unit Usage: Display
  • SubUnit Usage: None
  • Format: STRING (See Table 31.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.30. KEYPRESS - Send the FMS encoded key press to the given display

  • Parameter ID: %x00.00.1d
  • Unit Usage: Display
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Values interpreted using osk_key dictionary (See Table 50.)

Table 50, below, shows the values defined in the osk-key Dictionary. These options represent the On screen keyboard keys.

Table 50: osk-key Dictionary
Name Value Definition
0 %d48 Character 0
1 %d49 Character 1
2 %d50 Character 2
3 %d51 Character 3
4 %d52 Character 4
5 %d53 Character 5
6 %d54 Character 6
7 %d55 Character 7
8 %d56 Character 8
9 %d57 Character 9
A %d65 Character A
B %d66 Character B
C %d67 Character C
D %d68 Character D
E %d69 Character E
F %d70 Character F
G %d71 Character G
H %d72 Character H
I %d73 Character I
J %d74 Character J
K %d75 Character K
L %d76 Character L
M %d77 Character M
N %d78 Character N
O %d79 Character O
P %d80 Character P
Q %d81 Character Q
R %d82 Character R
S %d83 Character S
T %d84 Character T
U %d85 Character U
V %d86 Character V
W %d87 Character W
X %d88 Character X
Y %d89 Character Y
Z %d90 Character Z
PREV %d60 Previous position or <
NEXT %d62 Next position or >
DEG %d127 Degrees
DIRECTTO %d128 Direct To
ENT %d129 Enter

4.7.31. SURFPOS - Position of arbitrary control surface

  • Parameter ID: %x00.00.1e
  • Unit Usage: Surface Type
  • SubUnit Usage: Surface Type Subassembly
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Default Range: SERVO (See Section 4.5.2.1.)

4.7.32. SURFREQ - Requested control surface position

  • Parameter ID: %x00.00.1f
  • Unit Usage: Surface Type
  • SubUnit Usage: Surface Type Subassembly
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Default Range: SERVO (See Section 4.5.2.1.)

4.7.33. SURFTORQUE - Aerodynamic torque applied to a control surface relative to movement

  • Parameter ID: %x00.00.20
  • Unit Usage: Surface Type
  • SubUnit Usage: Surface Type Subassembly
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: LBFT multiplied by 100.

4.7.34. SURFFORCE - Aerodynamic force applied to a control surface relative to movement

  • Parameter ID: %x00.00.21
  • Unit Usage: Surface Type
  • SubUnit Usage: Surface Type Subassembly
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: LB multiplied by 100.

4.7.35. WINDSPD - Wind Speed

  • Parameter ID: %x00.00.22
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: KT multiplied by 100.

4.7.36. WINDBRG - True Bearing from which wind blows

  • Parameter ID: %x00.00.23
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Default Range: HDG (See Section 4.5.2.6.)
  • Units: DEG multiplied by 100.

4.7.37. COMFREQ - Communication Frequency - If SYS/USERSEL, sets COMFREQTX and COMFREQRX. RAW should match COMFREQTX.

  • Parameter ID: %x00.00.24
  • Unit Usage: Radio ID
  • SubUnit Usage: 0=Radio/1+=Presets
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Default Range: COMFREQ (See Section 4.5.2.11.)
  • Units: MHZ multiplied by 100000.

4.7.38. COMFREQR - Range of acceptable communication frequencies

  • Parameter ID: %x00.00.24
  • Unit Usage: Radio ID
  • SubUnit Usage: 0=Current Band/1+=By COM Band
  • Format: RANGE (See Table 39.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.39. NAVFREQ - Navigation Frequency

  • Parameter ID: %x00.00.25
  • Unit Usage: Radio ID
  • SubUnit Usage: 0=Radio/1+=Presets
  • Format: UINT (See Table 26.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Default Range: NAVFREQ (See Section 4.5.2.12.)
  • Units: MHZ multiplied by 100000.

4.7.40. COMVOL - Communication Volume (0-100)

  • Parameter ID: %x00.00.26
  • Unit Usage: Radio ID
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Default Range: PERCENT (See Section 4.5.2.4.)
  • Units: PCENT.

4.7.41. NAVVOL - Communication Volume (0-100)

  • Parameter ID: %x00.00.27
  • Unit Usage: Radio ID
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Default Range: PERCENT (See Section 4.5.2.4.)
  • Units: PCENT.

4.7.42. COMSQL - Communication Squelch (0-100)

  • Parameter ID: %x00.00.28
  • Unit Usage: Radio ID
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Default Range: PERCENT (See Section 4.5.2.4.)
  • Units: PCENT.

4.7.43. MUX - Selected multiplexer input or output

  • Parameter ID: %x00.29
  • Unit Usage: MUX ID
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.44. ICSVOL - Intercom Volume (0-100)

  • Parameter ID: %x00.00.2a
  • Unit Usage: Audio Panel Unit
  • SubUnit Usage: 0=System, 1=Pilot, 2=Copilot, rest are pax
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Default Range: PERCENT (See Section 4.5.2.4.)
  • Units: PCENT.

4.7.45. COMSTATE - COM radio state

  • Parameter ID: %x00.00.2b
  • Unit Usage: Radio ID
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Values interpreted using com_state dictionary (See Table 51.)

Table 51, below, shows the values defined in the com-state Dictionary. These options represent the State of communication radio.

Table 51: com-state Dictionary
Name Value Definition
IDLE R Ready to Receive (Idle)
RX r Active receiving
TX T Active transmitting
STUCK S Stuck Mic
FAULT F Fault

4.7.46. ICSRXCOMS - Which COM Radios to Monitor (mask)

  • Parameter ID: %x00.00.2c
  • Unit Usage: Audio Panel Unit
  • SubUnit Usage: 0=System, 1=Pilot, 2=Copilot, rest are pax
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.47. ICSRXNAVS - Which NAV Radios to Monitor (mask)

  • Parameter ID: %x00.00.2d
  • Unit Usage: Audio Panel Unit
  • SubUnit Usage: 0=System, 1=Pilot, 2=Copilot, rest are pax
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.48. ICSMODE - Intercom Mode

  • Parameter ID: %x00.00.2e
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Values interpreted using ics_mode dictionary (See Table 52.)

Table 52, below, shows the values defined in the ics-mode Dictionary. These options represent the State of intercom system.

Table 52: ics-mode Dictionary
Name Value Definition
PILOT P Pilot Isolate
CREW C Crew Isolate
ALL A All
FEATUREMASK %xff.00 Mask for intercom features
POSITIONAL %x01.00 Positional dynamic audio

4.7.49. ICSTXCOMS - Which COM Radios to Transmit (mask)

  • Parameter ID: %x00.00.2f
  • Unit Usage: Audio Panel Unit
  • SubUnit Usage: 0=System, 1=Pilot, 2=Copilot, rest are pax
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.50. DATE - Date in YYYY-MM-DD format

  • Parameter ID: %x00.00.30
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: STRING (See Table 31.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.51. GLOAD - Current Normal to Aircraft Loading

  • Parameter ID: %x00.00.31
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: G multiplied by 1000.

4.7.52. RATEOFTURN - Turn Coordinator Rate Per Second

  • Parameter ID: %x00.00.32
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: DEG multiplied by 1000.

4.7.53. GROUNDSPEED - Groundspeed

  • Parameter ID: %x00.00.33
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: KT multiplied by 100.

4.7.54. VSPEED - Vertical speed

  • Parameter ID: %x00.00.34
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: FPM multiplied by 1.

4.7.55. XPDRIDENT - XPDR Ident request (USERSELECT only). Non-standby transponders must IDENT regardless of UNIT. Used only to request IDENT, but IDENT state reported in XPDRMODE

  • Parameter ID: %x00.00.35
  • Unit Usage: Always zero
  • SubUnit Usage: None
  • Format: BOOL (See Table 24.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.56. XPDRRPS - XPDR Replies per second (normalized)

  • Parameter ID: %x00.00.36
  • Unit Usage: XPDR ID
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.57. XPDRSQUAWK - XPDR Squawk in octal. All transponders must change SQUAWK regardless of UNIT

  • Parameter ID: %x00.00.37
  • Unit Usage: XPDR ID (Rx Only) Zero for USERSELECT
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Values interpreted using octal dictionary (See Table 53.)

Table 53, below, shows the values defined in the octal Dictionary. These options represent the Octal representation.

Table 53: octal Dictionary
Name Value Definition
octal N/A Octal representation

4.7.58. XPDRMODE - XPDR Mode. Note that IDENT flag is ignored in USERSELECT condition.

  • Parameter ID: %x00.00.38
  • Unit Usage: XPDR ID
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Values interpreted using xpdr_mode dictionary (See Table 54.)

Table 54, below, shows the values defined in the xpdr-mode Dictionary. These options represent the Transponder mode and flags.

Table 54: xpdr-mode Dictionary
Name Value Definition
UNKNOWN %d0 Unknown
MODEMASK %x7f Mask for mode
STANDBY O Standby
GND G On Ground
AIR A Air/Altitude Reporting
FLAG-IDENT %x80 IDENT Active

4.7.59. NAVOBS - NAV OBS Value

  • Parameter ID: %x00.00.39
  • Unit Usage: Radio/FMS ID
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Default Range: OBS (See Section 4.5.2.7.)
  • Units: DEG multiplied by 1000.

4.7.60. NAVBRG - Bearing to nav aid

  • Parameter ID: %x00.00.3a
  • Unit Usage: Radio/FMS ID
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Default Range: HDG (See Section 4.5.2.6.)
  • Units: DEG multiplied by 100.

4.7.61. NAVCDI - Course Deviation (-1000 to 1000)

  • Parameter ID: %x00.00.3b
  • Unit Usage: Radio/FMS ID
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Default Range: DEVIATION (See Section 4.5.2.8.)

4.7.62. NAVGSI - Glide Slope (-1000 to 1000)

  • Parameter ID: %x00.00.3c
  • Unit Usage: Radio/FMS ID
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Default Range: DEVIATION (See Section 4.5.2.8.)

4.7.63. NAVFLAGS - Navigation Flags (see XFS_NAV_FLAG_*

  • Parameter ID: %x00.00.3d
  • Unit Usage: Radio/FMS ID
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Values interpreted using nav_flag dictionary (See Table 55.)

Table 55, below, shows the values defined in the nav-flag Dictionary. These options represent the Navigational flag states.

4.7.64. FLAPREQ - Requested Flap Position 0 = up, 100000 = fully down, -100000 is fully negative

  • Parameter ID: %x00.00.3e
  • Unit Usage: Actuator/0=Aircraft
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Default Range: SERVO (See Section 4.5.2.1.)

4.7.65. FLAPPOS - Flap actuator position, 0 = up, 100000 = fully down, -100000 is fully negative

  • Parameter ID: %x00.00.3f
  • Unit Usage: Actuator/0=Aircraft
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Default Range: SERVO (See Section 4.5.2.1.)

4.7.66. ECBSTAT - ECB Status change or request, see xfs_ecb.h

  • Parameter ID: %x00.00.40
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: BUS (See Table 36.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.67. PTRIMREQ - Requested Pitch Trim Position (negative nose down, 0 neutral, positive nose up)

  • Parameter ID: %x00.00.41
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Default Range: SERVO (See Section 4.5.2.1.)

4.7.68. PTRIMPOS - Pitch Trim Position (negative nose down, 0 neutral, positive nose up)

  • Parameter ID: %x00.00.42
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Default Range: SERVO (See Section 4.5.2.1.)

4.7.69. RTRIMREQ - Requested Roll Trim Position (negative left bank, 0 neutral, positive right bank)

  • Parameter ID: %x00.00.43
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Default Range: SERVO (See Section 4.5.2.1.)

4.7.70. RTRIMPOS - Roll Trim Position (negative left bank, 0 neutral, positive right bank)

  • Parameter ID: %x00.00.44
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Default Range: SERVO (See Section 4.5.2.1.)

4.7.71. BUSSTAT - Status of Bus

  • Parameter ID: %x00.00.45
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: BUS (See Table 36.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.72. TEMP - Arbitrary Temperature in a location

  • Parameter ID: %x00.00.46
  • Unit Usage: Location
  • SubUnit Usage: Sensor Number/0=Average
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: C multiplied by 100.

4.7.73. TAS - True Airspeed

  • Parameter ID: %x00.00.47
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: KT multiplied by 100.

4.7.74. TAT - Total Air Temperature

  • Parameter ID: %x00.00.48
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: C multiplied by 100.

4.7.75. OAT - Outside Air Temperature accounting for compressibility

  • Parameter ID: %x00.00.49
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: C multiplied by 100.

4.7.76. D-ALT - Density Altitude

  • Parameter ID: %x00.00.4a
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: FT multiplied by 10.

4.7.77. OILPRES - Oil Pressure

  • Parameter ID: %x00.00.4b
  • Unit Usage: Engine
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: PSI multiplied by 100.

4.7.78. OILTEMP - Oil Temp

  • Parameter ID: %x00.00.4c
  • Unit Usage: Engine
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: C multiplied by 100.

4.7.79. XFDFPS - XFD Display Frames Per Second (FPS)

  • Parameter ID: %x00.00.4d
  • Unit Usage: Display
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.80. TIREPRES - Tire Pressure

  • Parameter ID: %x00.00.4e
  • Unit Usage: Bogey
  • SubUnit Usage: Tire
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: PSI multiplied by 100.

4.7.81. CHT - Cylinder Head Temperature

  • Parameter ID: %x00.00.4f
  • Unit Usage: Engine
  • SubUnit Usage: Cylinder/0=Max
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: C multiplied by 100.

4.7.82. EGT - Exhaust Gas Temperature

  • Parameter ID: %x00.00.50
  • Unit Usage: Engine
  • SubUnit Usage: Cylinder/0=Max
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: C multiplied by 100.

4.7.83. COOLTEMP - Coolant Temperature

  • Parameter ID: %x00.00.51
  • Unit Usage: Engine
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: C multiplied by 100.

4.7.84. FUELWTFLOW - Fuel Flow by Weight

  • Parameter ID: %x00.00.52
  • Unit Usage: Engine
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: LBPH multiplied by 100.

4.7.85. FUELPRES - Fuel Pressure

  • Parameter ID: %x00.00.53
  • Unit Usage: Engine
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: PSI multiplied by 100.

4.7.86. FUELWT - Fuel Weight

  • Parameter ID: %x00.00.54
  • Unit Usage: Fuel Tank ID/0=Sum of all
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: LB multiplied by 100.

4.7.87. MANPRES - Manifold pressure

  • Parameter ID: %x00.00.55
  • Unit Usage: Engine
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: INHG multiplied by 1000.

4.7.88. ENGRPM - Engine RPM

  • Parameter ID: %x00.00.56
  • Unit Usage: Engine
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL be a Range Parameter for this parameter.

4.7.89. PROPRPM - Propeller RPM

  • Parameter ID: %x00.00.57
  • Unit Usage: Engine
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL be a Range Parameter for this parameter.

4.7.90. MACH - Mach

  • Parameter ID: %x00.00.58
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: MACH multiplied by 10000.

4.7.91. IASBUG - Target indicated airspeed

  • Parameter ID: %x00.00.59
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: KT multiplied by 100.

4.7.92. HDGBUG - Bugged Magnetic Heading

  • Parameter ID: %x00.00.5a
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Default Range: HDG (See Section 4.5.2.6.)
  • Units: DEG multiplied by 100.

4.7.93. ALTBUG - Bugged Altitude

  • Parameter ID: %x00.00.5b
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: FT multiplied by 10.

4.7.94. WAYPOINT - A way point in a flight plan, subunit is position in flightplan, beginning with 1 for first waypoint. Subunit 0 is only used to indicate an empty flight plan.

  • Parameter ID: %x00.00.5c
  • Unit Usage: FMS ID
  • SubUnit Usage: None
  • Format: WAYPOINT (See Table 27.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.95. INSERT - Insert A way point in a flight plan, subunit is position in flightplan which it should become (SYSSEL/USERSEL ONLY)

  • Parameter ID: %x00.00.5d
  • Unit Usage: FMS ID
  • SubUnit Usage: None
  • Format: WAYPOINT (See Table 27.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.96. DELETE - Delete A way point in a flight plan, subunit is position in flightplan starting at 1 (SYSSEL/USERSEL ONLY). Label must match

  • Parameter ID: %x00.00.5e
  • Unit Usage: FMS ID
  • SubUnit Usage: None
  • Format: WAYPOINT (See Table 27.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.97. NOTE - Notation of something important within the quick access log or bus

  • Parameter ID: %x00.00.5f
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: STRING (See Table 31.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.98. NAVGPS - GPS Mode

  • Parameter ID: %x00.00.60
  • Unit Usage: NAV radio unit or FMS Unit Number
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Values interpreted using nav_gps dictionary (See Table 56.)

Table 56, below, shows the values defined in the nav-gps Dictionary. These options represent the Global positioning system status.

4.7.99. COMFREQTX - Transmit Communication Frequency shares range with COMFREQ

  • Parameter ID: %x00.00.61
  • Unit Usage: Radio ID
  • SubUnit Usage: 0=Radio/1+=Presets
  • Format: UINT (See Table 26.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Default Range: COMFREQ (See Section 4.5.2.11.)
  • Units: MHZ multiplied by 100000.

4.7.100. NAVXTK - Cross track error (negative is left)

  • Parameter ID: %x00.00.62
  • Unit Usage: FMS Unit Number
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: NM multiplied by 1000.

4.7.101. COMFREQRX - Receive Communication Frequency shares range with COMFREQ

  • Parameter ID: %x00.00.63
  • Unit Usage: Radio ID
  • SubUnit Usage: 0=Radio/1+=Presets
  • Format: UINT (See Table 26.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Default Range: COMFREQ (See Section 4.5.2.11.)
  • Units: MHZ multiplied by 100000.

4.7.102. BRIGHTNESS - Universal display brightness (0-1000 for night time mode, 1000-2000 for daytime modes

  • Parameter ID: %x00.00.64
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Default Range: BRIGHTNESS (See Section 4.5.2.10.)

4.7.103. MANTEMP - Manifold temperature

  • Parameter ID: %x00.00.65
  • Unit Usage: Engine
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: C multiplied by 100.

4.7.104. DIRECT - Go direct to a way point in a flight plan, subunit is position in flightplan starting at 1 (SYSSEL/USERSEL ONLY). Label must match

  • Parameter ID: %x00.00.66
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: WAYPOINT (See Table 27.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.105. ACTIVATE - Activate leg terminating at way point in a flight plan, subunit is position in flightplan (SYSSEL/USERSEL ONLY). Label must match

  • Parameter ID: %x00.00.67
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: WAYPOINT (See Table 27.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.106. MMPARAM - Moving Map parameters. Subunit is one of XFS_MM_PARAM_*

  • Parameter ID: %x00.00.68
  • Unit Usage: MOVMAP ID
  • SubUnit Usage: XFS_MM_PARAM_*
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.107. SERVOREQ - Requested servo position and state

  • Parameter ID: %x00.00.69
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SERVO (See Table 47.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.108. SERVOPOS - Current servo actuator position

  • Parameter ID: %x00.00.6a
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Default Range: SERVO (See Section 4.5.2.1.)

4.7.109. SONICHAT - Ultrasonic rangefinder height above terrain

  • Parameter ID: %x00.00.6b
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: FT multiplied by 100.

4.7.110. LIDARHAT - LIDAR rangefinder height above terrain

  • Parameter ID: %x00.00.6c
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: FT multiplied by 100.

4.7.111. RADARHAT - Radar rangefinder height above terrain

  • Parameter ID: %x00.00.6d
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: FT multiplied by 100.

4.7.112. HAT - Computed height above terrain

  • Parameter ID: %x00.00.6e
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: FT multiplied by 100.

4.7.113. COMSTANDBY - Standby COM Frequency (same rules and range as COMFREQ)

  • Parameter ID: %x00.00.6f
  • Unit Usage: Radio ID
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Default Range: COMFREQ (See Section 4.5.2.11.)

4.7.114. NAVSTANDBY - Standby NAV Frequency (same rules and range as NAVFREQ)

  • Parameter ID: %x00.00.70
  • Unit Usage: Radio ID
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Default Range: NAVFREQ (See Section 4.5.2.12.)

4.7.115. STALLSPEED - Estimated real-time Stall speed

  • Parameter ID: %x00.00.71
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: KT multiplied by 100.

4.7.116. TIMEMS - Time in milliseconds from midnight zulu time

  • Parameter ID: %d0
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.117. YTRIMREQ - Requested Yaw Trim Position (negative left, 0 neutral, positive right)

  • Parameter ID: %x00.00.73
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Default Range: SERVO (See Section 4.5.2.1.)

4.7.118. YTRIMPOS - Yaw Trim Position (negative left, 0 neutral, positive right)

  • Parameter ID: %x00.00.74
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Default Range: SERVO (See Section 4.5.2.1.)

4.7.119. VSPEEDBUG - Vertical speed bug in fpm

  • Parameter ID: %x00.00.75
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.120. MUSICSRC - Music Source (0 = none)

  • Parameter ID: %x00.00.76
  • Unit Usage: Audio Panel Unit
  • SubUnit Usage: 0=System, 1=Pilot, 2=Copilot, rest are pax
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.121. AOA - Angle of attack as an actual angle

  • Parameter ID: %x00.00.77
  • Unit Usage: Source
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: DEG multiplied by 1000.

4.7.122. AOAR - Angle of attack range -- should contain green (beginning of approach range), white (reference angle), yellow (approaching stall) and a red (imminent stall)

  • Parameter ID: %x00.00.77
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: RANGE (See Table 39.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.123. GPIO - GPIO Input/Output

  • Parameter ID: %x00.00.78
  • Unit Usage: I/O Module
  • SubUnit Usage: Module Port (0 or 1-8)
  • Format: GPIO (See Table 41.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.124. ANALOG - Raw Analog value 0-4095

  • Parameter ID: %x00.00.79
  • Unit Usage: I/O Module
  • SubUnit Usage: Module Port (1-8)
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.125. PWM - PWM value 0-4095 -- subunit is port number, 1-8

  • Parameter ID: %x00.00.7a
  • Unit Usage: I/O Module
  • SubUnit Usage: Module Port (1-8)
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.126. XPDRACID - ICAO 24-bit Aircraft Identifier

  • Parameter ID: %x00.00.7b
  • Unit Usage: XPDR ID (Rx Only) Zero for USERSELECT
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Values interpreted using hex dictionary (See Table 57.)

Table 57, below, shows the values defined in the hex Dictionary. These options represent the Hexadecimal representation.

Table 57: hex Dictionary
Name Value Definition
hex N/A Hexadecimal representation

4.7.127. XPDRFLID - Up to 8-character, NULL terminated flight ID

  • Parameter ID: %x00.00.7c
  • Unit Usage: XPDR ID (Rx Only) Zero for USERSELECT
  • SubUnit Usage: None
  • Format: STRING (See Table 31.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.128. THROTREQ - Requested throttle position

  • Parameter ID: %x00.00.7d
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SERVO (See Table 47.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.129. RPMREQ - Prop governor requested RPM

  • Parameter ID: %x00.00.7e
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.130. TACHTIME - Tachometer time, unit is engine

  • Parameter ID: %x00.00.7f
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: S.

4.7.131. TOTTIME - Total aircraft time

  • Parameter ID: %x00.00.80
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: S.

4.7.132. APPSTAT - Application Status / Requests

  • Parameter ID: %x00.00.00.81
  • Unit Usage: CPU ID
  • SubUnit Usage: Process ID
  • Format: APP (See Table 42.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.133. CDINAVSRC - Select index (> 0) of CDI NAV Source or 0 for none

  • Parameter ID: %x00.00.82
  • Unit Usage: Display
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.134. BRGNAVSRC - Select index (> 0) CDI BRG Source or 0 for none

  • Parameter ID: %x00.00.83
  • Unit Usage: Display
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.135. COMSEL - Select COM Radio for Tuning

  • Parameter ID: %x00.00.84
  • Unit Usage: Display
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.136. NAVSEL - Select NAV Radio for Tuning

  • Parameter ID: %x00.00.85
  • Unit Usage: Display
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.137. MSTRCAUTN - Master Caution Active when true. Resets by SYSSEL/USERSEL with value of FALSE

  • Parameter ID: %x00.00.86
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: BOOL (See Table 24.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.138. MSTRWARN - Master Warning Active when true. Resets by SYSSEL/USERSEL with value of FALSE

  • Parameter ID: %x00.00.87
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: BOOL (See Table 24.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.139. ROLLRT - Rate of change of about A/C longitudinal axis (P)

  • Parameter ID: %x00.00.88
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: DEGPS multiplied by 1000.

4.7.140. PITCHRT - Rate of change about A/C transverse axis (Q)

  • Parameter ID: %x00.00.89
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: DEGPS multiplied by 1000.

4.7.141. YAWRT - Rate of change about A/C vertical axis (R)

  • Parameter ID: %x00.00.8a
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: DEGPS multiplied by 1000.

4.7.142. STKPITCH - Stick Pitch Position (negative nose down, 0 neutral, positive nose up)

  • Parameter ID: %x00.00.8b
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Default Range: SERVO (See Section 4.5.2.1.)

4.7.143. STKROLL - Stick Roll Position (negative left bank, 0 neutral, positive right bank)

  • Parameter ID: %x00.00.8c
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Default Range: SERVO (See Section 4.5.2.1.)

4.7.144. STKYAW - Pedal Yaw Position (negative left, 0 neutral, positive right)

  • Parameter ID: %x00.00.8d
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Default Range: SERVO (See Section 4.5.2.1.)

4.7.145. BATTTEMP - Battery Temp

  • Parameter ID: %x00.00.8e
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: C multiplied by 100.

4.7.146. MOTORTEMP - Motor Temp

  • Parameter ID: %x00.00.8f
  • Unit Usage: Motor
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: C multiplied by 100.

4.7.147. POWERTEMP - Temp of a device supplying/converting power to a propulsion system

  • Parameter ID: %x00.00.90
  • Unit Usage: Propulsion System
  • SubUnit Usage: Power converter/0=Max
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: C multiplied by 100.

4.7.148. TORQUE - Torque

  • Parameter ID: %x00.00.91
  • Unit Usage: Motor/Engine
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: LBFT multiplied by 100.

4.7.149. TAILNUM - Up to 8-character, NULL terminated tail number

  • Parameter ID: %x00.00.92
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: STRING (See Table 31.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.150. ROLLREQ - F/D requested degrees of roll in 100 * degrees with 0 being right side up, -18000 being being upside down towards left, 18000 being upside down to the right

  • Parameter ID: %x00.00.93
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Default Range: ROLL (See Section 4.5.2.2.)

4.7.151. PITCHREQ - F/D requested degrees of pitch in 100 * degrees with 0 being straight ahead, 9000 being straight up, -9000 being straight down

  • Parameter ID: %x00.00.94
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Default Range: PITCH (See Section 4.5.2.3.)

4.7.152. YAWREQ - F/D requested G force of inclination with 0 being no yaw

  • Parameter ID: %x00.00.95
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: G multiplied by 10000.

4.7.153. STKPITCHREQ - A/P Requested Stick Pitch Position (negative nose down, 0 neutral, positive nose up)

  • Parameter ID: %x00.00.96
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SERVO (See Table 47.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.154. STKROLLREQ - A/P Requested Stick Roll Position (negative left bank, 0 neutral, positive right bank)

  • Parameter ID: %x00.00.97
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SERVO (See Table 47.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.155. STKYAWREQ - A/P Requested Pedal Yaw Position (negative left, 0 neutral, positive right)

  • Parameter ID: %x00.00.98
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SERVO (See Table 47.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.156. FDMODEACT - Active Flight Director Modes

  • Parameter ID: %x00.00.99
  • Unit Usage: FD Number (0 for setting values)
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Values interpreted using afcs_fd_mode dictionary (See Table 58.)

Table 58, below, shows the values defined in the afcs-fd-mode Dictionary. These options represent the Vertical, lateral and yaw modes of flight director.

Table 58: afcs-fd-mode Dictionary
Name Value Definition
VERT-MASK %xff Vertical modes mask
LAT-MASK %xff.00 Lateral modes mask
YAW-MASK %xff.00.00.00 Yaw modes mask
PITCH %x01 Activate pitch mode
VS %x02 Activate vertical speed mode
FLC %x04 Activate indicated airspeed mode / flight level change
PRF %x08 Activate angle of attack / performance mode
ALT %x10 Arm Altitude mode
VNAV %x20 Arm vertical nav mode
GP %x40 Arm approach mode vertical portion
FLARE %x80 Arm flare mode
ROLL %x01.00 Activate wing leveler mode
HDG %x02.00 Activate heading mode
NAV %x04.00 Arm navigation mode
APPR %x08.00 Arm approach mode
YD %x01.00.00.00 Fixed Yaw Damper
SLIP %x02.00.00.00 Activate slip mode (adjustable YD)
SLIPAPPR %x04.00.00.00 Activate approach slip mode (adjustable YD)

4.7.157. FDMODEARM - Armed Flight Director Modes (XFS_AFCS_FD_MODE_*

  • Parameter ID: %x00.00.9a
  • Unit Usage: FD Number (0 for setting values)
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Values interpreted using afcs_fd_mode dictionary (See Table 58.)

4.7.158. ALTHOLDBUG - Altitude used by FD for altitude hold

  • Parameter ID: %x00.00.9b
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: FT multiplied by 10.

4.7.159. APMODE - Autopilot Modes

  • Parameter ID: %x00.00.9c
  • Unit Usage: AP Number (0 for setting value)
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Values interpreted using afcs_ap_mode dictionary (See Table 59.)

Table 59, below, shows the values defined in the afcs-ap-mode Dictionary. These options represent the Vertical, lateral and yaw modes of autopilot and throttle.

Table 59: afcs-ap-mode Dictionary
Name Value Definition
VERT-MASK %xff Vertical modes mask
LAT-MASK %xff.00 Lateral modes mask
THROT-MASK %xff.00.00 Throttle modes mask
YAW-MASK %xff.00.00.00 Yaw modes mask
PITCH %x01 Pitch mode
EPPITCH %x02 Pitch mode only for envelope protection
ROLL %x01.00 Roll mode
EPROLL %x02.00 Roll mode only for envelope protection
SPD %x01.00.00 Activate autothrottle speed tracking
EPSPD %x02.00.00 Autothrottle only for envelope protection (SPD mode)
AOA %x04.00.00 Activate autothrottle AoA tracking
EPAOA %x08.00.00 Autothrottle only for envelope protection (AOA mode)
TOGA %x10.00.00 Activate takeoff / go-around throttle
EPTOGA %x20.00.00 Autothrottle only for envelope protection (TOGA mode)
YAW %x01.00.00.00 Yaw mode
EPYAW %x02.00.00.00 Yaw envelope protection

4.7.160. ICSSQL - Intercom Squelch (0-100)

  • Parameter ID: %x00.00.9d
  • Unit Usage: Audio Panel Unit
  • SubUnit Usage: 0=System, 1=Pilot, 2=Copilot, rest are pax
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Default Range: PERCENT (See Section 4.5.2.4.)
  • Units: PCENT.

4.7.161. PITCHBUG - Target pitch

  • Parameter ID: %x00.00.9e
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Default Range: PITCH (See Section 4.5.2.3.)
  • Units: DEG multiplied by 100.

4.7.162. PTSPEED - Power Turbine Speed (commonly N1)

  • Parameter ID: %x00.00.9f
  • Unit Usage: Engine
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: PCENT multiplied by 1000.

4.7.163. GTSPEED - Gas Turbine Speed (commonly N2 or Ng)

  • Parameter ID: %x00.00.a0
  • Unit Usage: Engine
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: PCENT multiplied by 1000.

4.7.164. TIT - Turbine Inlet Temperature

  • Parameter ID: %x00.00.a1
  • Unit Usage: Engine
  • SubUnit Usage: Turbo/0=Max
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: C multiplied by 100.

4.7.165. ITT - Inter-Turbine Temperature

  • Parameter ID: %x00.00.a2
  • Unit Usage: Engine
  • SubUnit Usage: Sensor/0=Average
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: C multiplied by 100.

4.7.166. POWER - Power under current engine and environmental conditions relative to engine design maximum

  • Parameter ID: %x00.00.a3
  • Unit Usage: Motor/Engine
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Default Range: SERVO (See Section 4.5.2.1.)
  • Units: PCENT multiplied by 1000.

4.7.167. ENGSTATUS - Engine specific set of flags or values

  • Parameter ID: %x00.00.a4
  • Unit Usage: Motor/Engine
  • SubUnit Usage: Engine Specific
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Values interpreted using hex dictionary (See Table 57.)

4.7.168. CABINALT - Cabin Equivalent Altitude

  • Parameter ID: %x00.00.a5
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: FT multiplied by 10.

4.7.169. CABINALTREQ - Cabin Equivalent Altitude

  • Parameter ID: %x00.00.a6
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: FT multiplied by 10.

4.7.170. DIFFPRES - Differential Pressure

  • Parameter ID: %x00.00.a7
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: PSI multiplied by 100.

4.7.171. DIFFPRESREQ - Requested Differential Pressure

  • Parameter ID: %x00.00.a8
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: PSI multiplied by 100.

4.7.172. FUELTEMP - Arbitraty Temperature in a location

  • Parameter ID: %x00.00.a9
  • Unit Usage: Engine/Fuel Tank
  • SubUnit Usage: SubLocation/0=Average,1=Sump
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: C multiplied by 100.

4.7.173. ENGSTATE - Engine operating state

  • Parameter ID: %x00.00.aa
  • Unit Usage: Motor/Engine
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Values interpreted using engstate dictionary (See Table 60.)

Table 60, below, shows the values defined in the engstate Dictionary. These options represent the States of engines.

Table 60: engstate Dictionary
Name Value Definition
UNKNOWN %x00 Engine Status Unknown
OFF %x01 Engine is Off
DRYMOTOR %x02 Engine Starting
STARTING %x03 Engine Starting
RUNNING %x04 Engine Running Normally
FLAMEOUT %x05 Engine Flamed Out / Failure
SHUTDOWN %x06 Engine Shutting Down
SHUTOFF %x07 Engine Shut Off
MODE-MASK %xff Mask for Engine State
FLAG-IGNITION %x01.00 Ignition On
FLAG-FUEL %x02.00 Fuel Shutoff Open
FLAG-STARTER %x04.00 Starter On
FLAG-GENERATOR %x08.00 Generator On
FLAG-BLEED %x10.00 Bleed Air On
FLAG-FIRE %x01.00.00 Fire Present
FLAG-EXTINGUISH %x02.00.00 Extinguisher Dispensed

4.7.174. ENGSTATEREQ - Requested Engine operating state

  • Parameter ID: %x00.00.ab
  • Unit Usage: Motor/Engine
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Values interpreted using engstate dictionary (See Table 60.)

4.7.175. BLEEDAIR - Bleed Air Level (Percent of Max)

  • Parameter ID: %x00.00.ac
  • Unit Usage: Motor/Engine
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: PCENT multiplied by 100.

4.7.176. BLEEDAIRREQ - Requested Bleed Air Level

  • Parameter ID: %x00.00.ad
  • Unit Usage: Motor/Engine
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: PCENT multiplied by 100.

4.7.177. LIGHTING - Lighting Color/Level

  • Parameter ID: %x00.00.ae
  • Unit Usage: System
  • SubUnit Usage: Specific
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: RGBA.

4.7.178. LIGHTINGREQ - Requested Lighting Color/Level

  • Parameter ID: %x00.00.af
  • Unit Usage: System
  • SubUnit Usage: Specific
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: RGBA.

4.7.179. ICING - Deicing State

  • Parameter ID: %x00.00.b0
  • Unit Usage: System/0=Aircraft
  • SubUnit Usage: Specific
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Values interpreted using icing_flag dictionary (See Table 61.)

Table 61, below, shows the values defined in the icing-flag Dictionary. These options represent the Status of ice detection, anti-ice and deicing systems.

Table 61: icing-flag Dictionary
Name Value Definition
ENGINE %x01 Engine Deicing/Anticing On
AIRFRAME %x02 Airframe Deicing/Anticing On
INSEP %x04 Inertial Separator Activated
PITOT %x08 Pitot/Static Heat Activated
PROPHEAT %x10 Propeller Heat Activated
WINDHEAT %x20 Windshield Heat Activated
CARBHEAT %x40 Carb Heat Activated
CARBICEDET %x40.00 Carb Icing Detected
ICEDET %x80.00 Icing Detected
ENGINE-FAIL %x01.00.00 Engine Deicing/Anticing Failed
AIRFRAME-FAIL %x02.00.00 Airframe Deicing/Anticing Failed
INSEP-FAIL %x04.00.00 Inertial Separator Failed
PITOT-FAIL %x08.00.00 Pitot/Static Heat Failed
PROPHEAT-FAIL %x10.00.00 Propeller Heat Failed
WINDHEAT-FAIL %x20.00.00 Windshield Heat Failed
CARBHEAT-FAIL %x40.00.00 Carb Heat Failed
CARBICEDET-FAIL %x40.00.00.00 Carb Icing Detection Failed
ICEDET-FAIL %x80.00.00.00 Icing Detection Failed

4.7.180. ICINGREQ - Requested Deicing State

  • Parameter ID: %x00.00.b1
  • Unit Usage: System/0=Aircraft
  • SubUnit Usage: Specific
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Values interpreted using icing_flag dictionary (See Table 61.)

4.7.181. LDGGEAR - Landing Gear State

  • Parameter ID: %x00.00.b2
  • Unit Usage: Wheel/0=Aircraft
  • SubUnit Usage: Specific
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Values interpreted using ldggear dictionary (See Table 62.)

Table 62, below, shows the values defined in the ldggear Dictionary. These options represent the Status of retractable landing gear.

Table 62: ldggear Dictionary
Name Value Definition
UNKNOWN %x00.00 Gear Status Unknown
DOWN %x00.01 Landing Gear Down
UP %x80.00 Landing Gear Up
FLAG-FAILED %x01.00.00 Landing Gear System is Failed

4.7.182. LDGGEARREQ - Landing Gear State

  • Parameter ID: %x00.00.b3
  • Unit Usage: Wheel/0=Aircraft
  • SubUnit Usage: Specific
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Values interpreted using ldggear dictionary (See Table 62.)

4.7.183. CABINTEMP - Cabin Temperature in a zone

  • Parameter ID: %x00.00.b4
  • Unit Usage: Zone
  • SubUnit Usage: Sensor Number/0=Average
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: C multiplied by 100.

4.7.184. CABINTEMPREQ - Requested Cabin Temperature in a zone

  • Parameter ID: %x00.00.b5
  • Unit Usage: Zone
  • SubUnit Usage: Sensor Number/0=Average
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: C multiplied by 100.

4.7.185. CHKLIST - Checklist Item

  • Parameter ID: %x00.00.b6
  • Unit Usage: Checklist Number
  • SubUnit Usage: Item Number/0=Title
  • Format: CASMSG (See Table 32.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.186. WBARM - Arm for selected station or aircraft

  • Parameter ID: %x00.00.b7
  • Unit Usage: Configuration
  • SubUnit Usage: 0=total/1=total no fuel/2+=station
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.

4.7.187. WBCONFIG - Selected aircraft configuration for weight and balance

  • Parameter ID: %x00.00.b8
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL be a Range Parameter for this parameter.

4.7.188. WBCATEGORY - Weight and balance aircraft category

  • Parameter ID: %x00.00.b9
  • Unit Usage: Configuration
  • SubUnit Usage: 0=total/1=total no fuel
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Values interpreted using weightbal_category dictionary (See Table 63.)

Table 63, below, shows the values defined in the weightbal-category Dictionary. These options represent the Aircraft operational categories.

Table 63: weightbal-category Dictionary
Name Value Definition
NORMAL %d1 Normal Category
UTILITY %d2 Utility Category
ACROBATIC %d3 Acrobatic Category
COMMUTER %d4 Commuter Category

4.7.189. WBSTATUS - Flags about weight and balance

  • Parameter ID: %x00.00.ba
  • Unit Usage: Configuration
  • SubUnit Usage: 0=total/1=total no fuel
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Values interpreted using weightbal_status dictionary (See Table 64.)

Table 64, below, shows the values defined in the weightbal-status Dictionary. These options represent the Weight and balance status.

Table 64: weightbal-status Dictionary
Name Value Definition
OK %d0 Weight and balance is OK
FWD %x01 Balance is forward of minimum CG for this weight
AFT %x02 Balance is aft of maximum CG for this weight
OVWTSTATN %x04 One or more stations are overweight
OVERMGTOW %x08 Weight exceeds maximum gross takeoff weight
OVERMLW %x10 Weight exceeds max landing weight
OVERZFW %x20 Weight exceeds max zero fuel weight

4.7.190. WBWEIGHT - Aircraft or station weight

  • Parameter ID: %x00.00.bb
  • Unit Usage: Configuration
  • SubUnit Usage: 0=total/1=total no fuel/2+=station
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: LB multiplied by 10.

4.7.191. TASEFFWT - Fuel Economy Relative to True Airspeed and Weight

  • Parameter ID: %x00.00.bc
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: NMPLB multiplied by 100000.

4.7.192. GSEFFWT - Fuel Economy Relative to Groundspeed and Weight

  • Parameter ID: %x00.00.bd
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: NMPLB multiplied by 100000.

4.7.193. TIMETOEMPTY - Time to Empty

  • Parameter ID: %x00.00.be
  • Unit Usage: Engine/0=Aircraft
  • SubUnit Usage: 0 - smoothed, without reserve, 1 - smoothed, with reserve, 2 - without reserve, 3 - with reserve
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: S multiplied by 10.

4.7.194. DISTTOEMPTY - Distance to Empty

  • Parameter ID: %x00.00.bf
  • Unit Usage: Engine/0=Aircraft
  • SubUnit Usage: 0 - smoothed, without reserve, 1 - smoothed, with reserve, 2 - without reserve, 3 - with reserve
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: NM multiplied by 100.

4.7.195. FLIGHTSTATE - State of Flight

  • Parameter ID: %x00.00.c0
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Values interpreted using flight_state dictionary (See Table 65.)

Table 65, below, shows the values defined in the flight-state Dictionary. These options represent the Status of aircraft within flight profile.

Table 65: flight-state Dictionary
Name Value Definition
UNKNOWN %d0 The state of the aircraft is not known
OFF %d1 The aircraft is completely powered down
HIBERNATE %d2 Minimal aircraft systems online not visible to the pilot
PREFLIGHT %d3 Minimal aircraft systems for pilot interaction online
ENGINE-START %d4 Engine(s) are preparing to start or are starting
PRETAXI %d5 Engine(s) are started, awaiting pre-taxi items
TAXI %d6 Aircraft is ready or in process of taxiing
RUNUP %d7 Aircraft is ready for, or in process of performing runup
READY %d8 Aircraft is ready for and positioned just short of takeoff
TAKEOFF %d9 Aircraft is in process of performing takeoff
AFTER-TAKEOFF %d10 Aircraft is airborne immediately but not yet configured for normal climb
DEPARTURE %d11 Aircraft is on a standard instrument departure
CLIMB %d12 Aircraft is climbing but not on an instrument departure
CRUISE %d13 Aircraft is at final cruise
DESCENT %d14 Aircraft is descending not on a standard arrival
ARRIVAL %d15 Aircraft is on a standard arrival
APPROACH %d16 Aircraft is on an instrument approach procedure
VISUAL %d17 Aircraft is flying a visual traffic pattern
MISSED %d18 Aircraft is executing a missed approach
SHUTDOWN %d19 Aircraft engines are shutting down or have shut down
SECURE %d20 Aircraft systems are shutting down or reconfiguring for preflight

4.7.196. UPDATESTATE - Status of any update

  • Parameter ID: %x00.00.c1
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: UPDATE (See Table 45.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.197. TORQUEREQ - Requested Torque

  • Parameter ID: %x00.00.c2
  • Unit Usage: Motor/Engine
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: LBFT multiplied by 100.

4.7.198. STKPITCHFRCE - Stick Pitch Force applied by the pilot, positive value - push, negative value - pull

  • Parameter ID: %x00.00.c3
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: LB multiplied by 100.

4.7.199. STKROLLFRCE - Stick Roll Force applied by the pilot, positive value - roll right, negative value - roll left

  • Parameter ID: %x00.00.c4
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: LB multiplied by 100.

4.7.200. STKYAWFRCE - Pedal Yaw Force applied by the pilot, positive value - right rudder, negative value - left rudder

  • Parameter ID: %x00.00.c5
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: LB multiplied by 100.

4.7.201. APPITCHFRCE - Auto Pilot Pitch Force exerted on control surfaces, positive value - push, negative value - pull

  • Parameter ID: %x00.00.c6
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: LB multiplied by 100.

4.7.202. APROLLFRCE - Auto Pilot Roll Force exerted on control surfaces, positive value - roll right, negative value - roll left

  • Parameter ID: %x00.00.c7
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: LB multiplied by 100.

4.7.203. APYAWFRCE - Auto Pilot Yaw Force exerted on control surfaces, positive value - right rudder, negative value - left rudder

  • Parameter ID: %x00.00.c8
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: LB multiplied by 100.

4.7.204. EFBPARAM - Up to 64-character, NULL terminated parameter value

  • Parameter ID: %x00.00.c9
  • Unit Usage: EFB ID
  • SubUnit Usage: XFS_EFB_PARAM_*
  • Format: STRING (See Table 31.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.205. OILPRESCOMP - Compensated Oil Pressure

  • Parameter ID: %x00.00.ca
  • Unit Usage: Engine
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: PSI multiplied by 100.

4.7.206. MACHBUG - Target Mach

  • Parameter ID: %x00.00.cb
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: MACH multiplied by 10000.

4.7.207. AOART - Angle of attack rate of change

  • Parameter ID: %x00.00.cc
  • Unit Usage: Source
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: DEG multiplied by 1000.

4.7.208. TASBUG - Target true airspeed

  • Parameter ID: %x00.00.cd
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: KT multiplied by 100.

4.7.209. GSBUG - Target groundspeed

  • Parameter ID: %x00.00.ce
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: KT multiplied by 100.

4.7.210. AOABUG - Bugged AOA

  • Parameter ID: %x00.00.cf
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: DEG multiplied by 1000.

4.7.211. ECUTIME - ECU Hours

  • Parameter ID: %x00.00.d1
  • Unit Usage: Engine
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: HR multiplied by 1000.

4.7.212. DBASE - Active database information

  • Parameter ID: %x00.00.d2
  • Unit Usage: CPU ID
  • SubUnit Usage: Process ID
  • Format: DBASE (See Table 49.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.213. EAS - Equivalent Airspeed

  • Parameter ID: %x00.00.d3
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: KT multiplied by 100.

4.7.214. EASRT - Equivalent Airspeed Rate of Change

  • Parameter ID: %x00.00.d4
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: KTPS multiplied by 100.

4.7.215. EASBUG - Target equivalent airspeed

  • Parameter ID: %x00.00.d5
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: KT multiplied by 100.

4.7.216. POWERREQ - Requested power as percent of engine design maximum

  • Parameter ID: %x00.00.d6
  • Unit Usage: Motor/Engine
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: PCENT multiplied by 1000.

4.7.217. BRAKE - Wheel brake status

  • Parameter ID: %x00.00.d7
  • Unit Usage: Left=1,Right=2,No direction=0
  • SubUnit Usage: Specific
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Values interpreted using brake dictionary (See Table 66.)

Table 66, below, shows the values defined in the brake Dictionary. These options represent the Status of wheel brakes.

Table 66: brake Dictionary
Name Value Definition
UNKNOWN %x00.00 Brake Status Unknown
NONE %x00.01 Brakes not pressed
MAX %x80.00 Max Braking
PARK %x01.00.00 Parking Brake Engaged
FLAG-FAILED %x02.00.00 Brake System is Failed

4.7.218. BRAKEREQ - Amount of brake requested

  • Parameter ID: %x00.00.d8
  • Unit Usage: Left=1,Right=2,No direction=0
  • SubUnit Usage: Specific
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Values interpreted using brake dictionary (See Table 66.)

4.7.219. NAVSQL - Communication Squelch (0-100)

  • Parameter ID: %x00.00.d9
  • Unit Usage: Radio ID
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Default Range: PERCENT (See Section 4.5.2.4.)
  • Units: PCENT.

4.7.220. STATIONID - VOR Station ID decoded from Morse code

  • Parameter ID: %x00.00.da
  • Unit Usage: Radio ID
  • SubUnit Usage: None
  • Format: STRING (See Table 31.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.221. SVPARAM - Synthetic Vision parameters. Subunit is one of XFS_SV_PARAM_*

  • Parameter ID: %x00.00.db
  • Unit Usage: SYNVIS ID
  • SubUnit Usage: XFS_SV_PARAM_*
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.222. FDCDISEL - Global selection of which CDI the flight director should track

  • Parameter ID: %x00.00.dc
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.223. BLOODOXY - Blood oxygen level of given seat occupant

  • Parameter ID: %x00.00.dd
  • Unit Usage: Seat position, 0=Lowest of all seats, 1=Pilot, 2=Copilot, etc
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Default Range: THOUPERCENT (See Section 4.5.2.5.)
  • Units: PCENT multiplied by 1000.

4.7.224. PULSE - Pulse rate of given seat occupant

  • Parameter ID: %x00.00.de
  • Unit Usage: Seat position, 0=Worst of all seats (too low or high), 1=Pilot, 2=Copilot, etc
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: CPM multiplied by 1000.

4.7.225. BREATHS - Breathing rate of given seat occupant

  • Parameter ID: %x00.00.df
  • Unit Usage: Seat position, 0=Worst of all seats (too low or high), 1=Pilot, 2=Copilot, etc
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: CPM multiplied by 1000.

4.7.226. CARBMONOX - Carbon Monoxide levels detected by sensor

  • Parameter ID: %x00.00.e0
  • Unit Usage: Carbon Monoxide Sensor ID
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: PPM multiplied by 100.

4.7.227. FLOWRATE - Oxygen flow rate

  • Parameter ID: %x00.00.e1
  • Unit Usage: Seat position, 0=Worst of all seats (too low or high), 1=Pilot, 2=Copilot, etc
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: LPM multiplied by 100.

4.7.228. TANKPRES - Oxygen tank pressure

  • Parameter ID: %x00.00.e2
  • Unit Usage: Tank number, 0=Worst of all tanks (too low or high), 1=Tank 1, 2=Tank 2, etc
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: PSI multiplied by 100.

4.7.229. RNAVVS - Vertical speed computed from RNAV

  • Parameter ID: %x00.00.e3
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: FPM multiplied by 1.

4.7.230. COMPRESET - Selected COM Radio Preset (0=Non-preset frequency)

  • Parameter ID: %x00.00.e4
  • Unit Usage: Radio
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Values interpreted using preset dictionary (See Table 67.)

Table 67, below, shows the values defined in the preset Dictionary. These options represent the XFS Preset Frequency.

Table 67: preset Dictionary
Name Value Definition
MANUAL %d0 Manual Tuning (no preset)
LAST %xff.fe Last selected frequency

4.7.231. COMNAME - Name of COM Radio or Preset Frequency

  • Parameter ID: %x00.00.e5
  • Unit Usage: Radio
  • SubUnit Usage: 0=Radio/1+=Presets
  • Format: STRING (See Table 31.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.232. NAVPRESET - Selected NAV Radio Preset (0=Non-preset frequency)

  • Parameter ID: %x00.00.e6
  • Unit Usage: Radio
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Values interpreted using preset dictionary (See Table 67.)

4.7.233. NAVNAME - Name of NAV Radio or Preset Frequency

  • Parameter ID: %x00.00.e7
  • Unit Usage: Radio
  • SubUnit Usage: 0=Radio/1+=Presets
  • Format: STRING (See Table 31.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.234. VNORTH - North component of velocity in true world coordinates

  • Parameter ID: %x00.00.e8
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: KT multiplied by 100.

4.7.235. VEAST - East component of velocity in true world coordinates

  • Parameter ID: %x00.00.e9
  • Unit Usage: Source ID
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: KT multiplied by 100.

4.7.236. ENGPOWER - Current Engine Power

  • Parameter ID: %x00.00.ea
  • Unit Usage: Engine
  • SubUnit Usage: 0=Shaft Power/1=Input Power Consumption/2+(even)=Component Shaft Power, 3+(odd)=Component Power Consumption
  • Format: UINT (See Table 26.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: KW multiplied by 1000.

4.7.237. CHARGE - Measured remaining battery charge

  • Parameter ID: %x00.00.eb
  • Unit Usage: Battery ID/0=Sum of all
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: AH multiplied by 1000.

4.7.238. CHARGETOT - Computed remaining charge

  • Parameter ID: %x00.00.ec
  • Unit Usage: Power System ID/0=Sum of all
  • SubUnit Usage: 0 = current total, 1 = total at end of flight
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: AH multiplied by 1000.

4.7.239. RWYSEL - Select airport runway surface to waypoint that is an airport, subunit is position in flightplan (SYSSEL/USERSEL ONLY). Label must match

  • Parameter ID: %x00.00.ed
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: WAYPOINT (See Table 27.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.240. COMSECMODE - Communication Security Mode

  • Parameter ID: %x00.00.ee
  • Unit Usage: Radio
  • SubUnit Usage: 0=Radio/1+=Presets
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Values interpreted using com_secmode dictionary (See Table 68.)

Table 68, below, shows the values defined in the com-secmode Dictionary. These options represent the Communication Security Mode.

Table 68: com-secmode Dictionary
Name Value Definition
TD %d1 TD
PT %d2 Plain Text
CT %d7 Cypher Text
INVALID %d8 Invalid Reserved
RV %d14 RV

4.7.241. COMBAND - Communication Band

  • Parameter ID: %x00.00.ef
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Values interpreted using com_band dictionary (See Table 69.)

Table 69, below, shows the values defined in the com-band Dictionary. These options represent the Communication Band.

Table 69: com-band Dictionary
Name Value Definition
UNKNOWN %d0 Unknown communication band
VHFFM %d1 Very High Frequency with Frequency Modulation
VHFAM %d2 Very High Frequency Amplitude Modulation
UHFFM %d3 Ultra High Frequency
UHFAM %d4 Ultra High Frequency
P25A %d5 Project 25 Analog
P25D %d6 Project 25 Digital
P25T %d7 Project 25 Trunk Mode
TSM %d8 Trellisware Scalable Mobile Ad-hoc NETworking
SATCOM %d9 Satellite Communication
SINCGARS %d10 SINCGARS Frequency Hop Frequencies
HFAM %d11 High Frequency Ampltitude Modulation

4.7.242. COMBANDMASK - Supported Communication Bands

  • Parameter ID: %x00.00.f0
  • Unit Usage: Radio
  • SubUnit Usage: None
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Values interpreted using com_bandmask dictionary (See Table 70.)

Table 70, below, shows the values defined in the com-bandmask Dictionary. These options represent the Supported Communication Band Mask.

Table 70: com-bandmask Dictionary
Name Value Definition
VHFFM %x01 Very High Frequency with Frequency Modulation
VHFAM %x02 Very High Frequency with Amplitude Modulation
UHFFM %x04 Ultra High Frequency with Frequency Modulation
UHFAM %x08 Ultra High Frequency with Amplitude Modulation
P25A %x10 Project 25 Analog
P25D %x20 Project 25 Digital
P25T %x40 Project 25 Trunk Mode
TSM %x80 Trellisware Scalable Mobile Ad-hoc NETworking
SATCOM %x01.00 Satellite Communication
SINCGARS %x02.00 SINCGARS Frequency Hop Frequencies
HFAM %x04.00 High Frequency

4.7.243. COMSQLMODETX - Squelch mode for transmit

  • Parameter ID: %x00.00.f1
  • Unit Usage: Radio
  • SubUnit Usage: 0=Radio/1+=Presets
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Values interpreted using com_sqlmode dictionary (See Table 71.)

Table 71, below, shows the values defined in the com-sqlmode Dictionary. These options represent the Communication Squelch Mode.

Table 71: com-sqlmode Dictionary
Name Value Definition
UNKNOWN %d0 Unknown Squelch Mode
NONE %d1 Squelch Off
SNR %d2 Signal to Noise Ratio
TONE %d3 FM Military Tone Squelch System
CTCSS %d4 Continuous Tone Coded Squelch System
DCS %d5 Digital Code Squelch
NAC %d6 Network Access Code P25 Trunk Mode

4.7.244. COMSQLMODERX - Squelch mode for receive

  • Parameter ID: %x00.00.f2
  • Unit Usage: Radio
  • SubUnit Usage: 0=Radio/1+=Presets
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Values interpreted using com_sqlmode dictionary (See Table 71.)

4.7.245. COMCTCSSTX - Frequency for CTCSS in Analog Transmit

  • Parameter ID: %x00.00.f3
  • Unit Usage: Radio
  • SubUnit Usage: 0=Radio/1+=Presets
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.246. COMCTCSSRX - Frequency for CTCSS in Analog Receive

  • Parameter ID: %x00.00.f4
  • Unit Usage: Radio
  • SubUnit Usage: 0=Radio/1+=Presets
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.247. COMDCSTX - Digital-Coded Squelch in Digital Transmit

  • Parameter ID: %x00.00.f5
  • Unit Usage: Radio
  • SubUnit Usage: 0=Radio/1+=Presets
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.248. COMDCSRX - Digital-Coded Squelch in Digital Receive

  • Parameter ID: %x00.00.f6
  • Unit Usage: Radio
  • SubUnit Usage: 0=Radio/1+=Presets
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.249. COMNACTX - Network Access Code in P25 Digital Transmit

  • Parameter ID: %x00.00.f7
  • Unit Usage: Radio
  • SubUnit Usage: 0=Radio/1+=Presets
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.250. COMNACRX - Network Access Code in P25 Digital Receive

  • Parameter ID: %x00.00.f8
  • Unit Usage: Radio
  • SubUnit Usage: 0=Radio/1+=Presets
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.251. COMSPACING - Communication Frequency Spacing

  • Parameter ID: %x00.00.f9
  • Unit Usage: Radio
  • SubUnit Usage: 0=Radio/1+=Presets
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: MHZ multiplied by 100000.

4.7.252. COMTGROUP - Active Communication Talk Group

  • Parameter ID: %x00.00.fa
  • Unit Usage: Radio
  • SubUnit Usage: 0=Radio/1+=Presets
  • Format: UINT (See Table 26.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.253. COMTGROUPR - Range for Talk Groups

  • Parameter ID: %x00.00.fb
  • Unit Usage: Radio
  • SubUnit Usage: None
  • Format: RANGE (See Table 39.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.254. COMTGNAME - Name of Talk Group

  • Parameter ID: %x00.00.fc
  • Unit Usage: Radio
  • SubUnit Usage: 0=radio active talk group, 1+= talkgroup name
  • Format: STRING (See Table 31.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.255. COMGUARD - If true monitor guard frequency

  • Parameter ID: %x00.00.fd
  • Unit Usage: Radio
  • SubUnit Usage: 0=Radio/1+=Presets
  • Format: BOOL (See Table 24.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.256. COMENCRYPT - If true, radio is operating in encrypted mode

  • Parameter ID: %x00.00.fe
  • Unit Usage: Radio
  • SubUnit Usage: 0=Radio/1+=Presets
  • Format: BOOL (See Table 24.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

4.7.257. FUELVOLTOT - Computed remaining fuel volume

  • Parameter ID: %x00.00.ff
  • Unit Usage: Fuel System ID/0=Sum of all
  • SubUnit Usage: 0 = current total, 1 = total at end of flight
  • Format: SINT (See Table 35.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.
  • Units: GAL multiplied by 1000.

4.7.258. FUELVOLFLOW - Fuel Flow by Volume

  • Parameter ID: %x00.01.00
  • Unit Usage: Engine
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: GPH multiplied by 1000.

4.7.259. FUELVOL - Fuel Volume

  • Parameter ID: %x00.01.01
  • Unit Usage: Fuel Tank ID/0=Sum of all
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: GAL multiplied by 1000.

4.7.260. TASEFFVOL - Fuel Economy Relative to True Airspeed and Volume

  • Parameter ID: %x00.01.02
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: NMPGAL multiplied by 1000000.

4.7.261. GSEFFVOL - Fuel Economy Relative to Groundspeed and Volume

  • Parameter ID: %x00.01.03
  • Unit Usage: None
  • SubUnit Usage: None
  • Format: SINT (See Table 35.)
  • Range: There SHALL be a Range Parameter for this parameter.
  • Units: NMPGAL multiplied by 1000000.

4.7.262. BITEST - Built-In Test Status

  • Parameter ID: %x00.01.04
  • Unit Usage: Device identifier/0=Whole Aircraft
  • SubUnit Usage: Test Number/0=Roll up of all tests for device
  • Format: CASMSG (See Table 32.)
  • Range: There SHALL NOT be a Range Parameter for this parameter.

5. Message Transport

5.1. Message Composition

Application software on a node determines when information or raw data need to be sent onto the network. These transmissions are done as messages with raw data and messages with parameters. If subsequent information or raw data having the same message class, ID, and flags occur in a timely fashion, they MAY be coalesced into a single message.

For each parameter to be sent, the common header (See Section 4.2) for the message data items MUST be populated. In addition, the Ident and Parameter Data MUST be populated with the corresponding data as per Section 4.7. The length in the common header MUST represent the actual length of the data, however, each parameter must be padded to a size that is a multiple of four octets.

The message header MUST be populated with the corresponding data as per Section 4.1, the message number MUST be monotonically increasing with an arbitrary initial value, and then the length in the common header MUST be set equal to the sum of the padded parameter length values. Once this assembly process is complete, the message can be transmitted.

5.2. Message Transmission and Reliability

XSEDE is designed to be used with a multicast UDP protocol however, there is no requirement to do so. Each endpoint MUST specify a listening address and port number with the default being 224.0.0.69 on port 20234 for IPv4. The actual address and port number are to be chosen by the system designer / installer for their particular needs. [RFC5771] specifies IPv4 Multicast Address Assignments and SHOULD be followed.

If the XSEDE message is successfully transmitted, no further action is required. Data assurance is the responsibility of the nodes implementing the XSEDE protocol.

5.3. Message Reception & decoding

XSEDE messages are received on the address and port that was configured in the prior section. The structure of the XSEDE message is designed to for flexible deployment in different networks. A node MAY use the src id to filter messages. This can either be a node filtering its own sent messages or filtering out messages from irrelevant nodes (i.e. selecting only specific computers when playing back a QAR file). The message number allows a node to ensure that messages are not processed out of sequence or duplicated. A node SHOULD ignore any message that is received out of sequence. A node MAY use the parameter identifiers to determine what information if any is relevant for local processing. Local processing is beyond the scope of this document.

Since there is no assured message delivery, all parameter interpretations MUST be idempotent to ensure multiple interpretations, or execution results in the same outcome.

5.4. Message Signing

Since XSEDE operates on a closed network, message signing is not currently supported but may be added in the future.

6. Example Message Flows

This section illustrates XSEDE features by example. The first example controls the radio.

6.1. Adjust radio

This example sets the radio Set Radio frequency and squelch by broadcasting USERSEL parameters. If a node controlling the radio receives the request, it will respond with a result similar to the one shown afterwards.

6.1.1. Message Header 



                        1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |    src id                     |    message number             |
   |         1001                  |          20                   |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |   msg class   | message ID    |       flags                   |
   |   3 = OP      | FLIGHTDATA 2  |    LEVEL-A    5               |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |              tcid             |          len                  |
   |       NONE    0               |          %x10                 |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      ...
Figure 4: Message Header Format
src id:
UINT16; This value was set to 1001 decimal at installation time.
message number:
UINT16; 20 decimal for illustration purposes.
msg class:
UINT8; "OP" value 3 decimal.
message ID:
UINT8; FLIGHTDATA decimal 2
flags:
UINT16; LEVEL-A decimal 5; See Table 21.
tcid:
t-NONE; See Table 22.
len:
UINT16 ; 0x10, or decimal 16 octets.

6.1.2. Frequency Message Header 




                        1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |             Unit              |           SubUnit             |
   |               2               |             0                 |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |  Parameter Data Len   |              Ident                    |
   |          4            |  COMFREQKHZ %x00.00.24                |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |     Format    |  Confidence   |   Expire   |      Pflags      |
   |  UINT   2     | USERSEL 192   |    %x00    | LEVEL-A    5     |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   :                  Parameter   Data                             :
   |                122750   or  0x0001 df7e                       |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 5: Setting frequency to 122.750
Unit:
UINT16; decimal 2 to match the requested radio.
SubUnit:
UINT16; 0 to signify the radio itself.
Parameter Data Len:
11 bits; decimal 4.
Ident:
21 bits; COMFREQKHZ - Communication Frequency, value %x00.00.24 See Section 4.7.
Format:
UINT (OCTET): decimal 2. See Section 4.3.
Confidence:
decimal 192 (OCTET): USERSEL. See Table 23.
Expire:
OCTET; Time to live. %x00 to not expire. See Section 4.2.2 for encoding.
Pflags:
LEVEL-A (OCTET) decimal 5. See Table 21
Parameter Data:
*(OCTET) value would be 122750, 0x0001 df7e.

6.1.3. Squelch Message Header 




                        1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |             Unit              |           SubUnit             |
   |               2               |             0                 |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |  Parameter Data Len   |              Ident                    |
   |          4            |  COMSQL %x00.00.28                    |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |     Format    |  Confidence   |   Expire   |      Pflags      |
   |  UINT   2     | USERSEL 192   |    %x00    | LEVEL-A    5     |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   :                  Parameter   Data                             :
   |                   53  or  0x0000 0035                         |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 6: Setting Squelch to 53
Unit:
UINT16; decimal 2 to match the requested radio.
SubUnit:
UINT16; 0 to signify the radio itself.
Parameter Data Len:
11 bits; decimal 4.
Ident:
21 bits; COMSQL - Communication Squelch (0-100), value %x00.00.28 See Section 4.7.
Format:
UINT (OCTET): decimal 2. See Section 4.3.
Confidence:
decimal 192 (OCTET): USERSEL. See Table 23.
Expire:
OCTET; Time to live. %x00 to not expire. See Section 4.2.2 for encoding.
Pflags:
LEVEL-A (OCTET) decimal 5. See Table 21
Parameter Data:
*(OCTET) value would be 53, 0x0000 0035.

6.1.4. Radio Status Report

After the above parameters affect a change in the radio, or as part of the radio's regularly scheduled parameter broadcast, a message like the following will be transmitted. It has almost all the same values as the original message but would likely include other parameters as well. Only the changed parameters are described.

The expire time is chosen at 2-3 times the scheduled broadcast time to ensure a fresh message is received within the valid time period should one be lost.



                        1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |           src id              |      message number           |
   |            1777               |          1255                 |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |   msg class   | message ID    |       flags                   |
   |   3 = OP      | FLIGHTDATA 2  |    LEVEL-A    5               |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |              tcid             |          len                  |
   |       NONE    0               |          %x20                 |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |             Unit              |           SubUnit             |
   |               2               |             0                 |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |  Parameter Data Len   |              Ident                    |
   |          4            |  COMFREQKHZ %x00.00.24                |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |     Format    |  Confidence   |   Expire   |      Pflags      |
   |  UINT   2     | RAW / R 10    |    %xC9    | LEVEL-A    5     |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   :                  Parameter   Data                             :
   |                122750   or  0x0001 df7e                       |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |             Unit              |           SubUnit             |
   |               2               |             0                 |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |  Parameter Data Len   |              Ident                    |
   |          4            |  COMSQL %x00.00.28                    |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |     Format    |  Confidence   |   Expire   |      Pflags      |
   |  UINT   2     |  RAW / R 10   |    %xC9    | LEVEL-A    5     |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   :                  Parameter   Data                             :
   |                   53  or  0x0000 0035                         |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 7: Radio Response Message
src id:
UINT16; This value is different than the prior message because this message is sent by the node controlling the radio. It was set to 1777 decimal at installation time.
message number:
UINT16; decimal 1255 for illustrative purposes. Note: this value is the current message sequence number for node 1777.
Confidence:
decimal 10 (OCTET): RAW / REPORTED in both parameters since this value is the actual reported value from the device. See Table 23.
Expire:
OCTET; Time to live. %xC9 to expire in about 15 seconds. See Section 4.2.2 for encoding.

6.2. Deploy Landing Gear Example

Landing Gear changes are different than radio changes in that it may take several seconds to affect a change. In this scenario, we will see a report by the node controlling the landing gear, followed by a parameter showing the user selecting a new value. Next, there will be a series of parameter broadcasts that showing the gear moving into position.

6.2.1. Initial Gear State Message 




                        1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |           src id              |      message number           |
   |            2222               |          3400                 |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |   msg class   | message ID    |       flags                   |
   |   3 = OP      | FLIGHTDATA 2  |    LEVEL-A    5               |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |              tcid             |          len                  |
   |       NONE    0               |          %x20                 |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |             Unit              |           SubUnit             |
   |               1               |             0                 |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |  Parameter Data Len   |              Ident                    |
   |          4            |        LDGGEAR %x00.00.b2             |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |     Format    |  Confidence   |   Expire   |      Pflags      |
   |  UINT   2     | RAW / R 10    |    %x77    | LEVEL-A    5     |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   :                  Parameter   Data                             :
   |                    0x8000   -   up.                           |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |             Unit              |           SubUnit             |
   |               2               |             0                 |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |  Parameter Data Len   |              Ident                    |
   |          4            |  LDGGEAR %x00.00.b2                |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |     Format    |  Confidence   |   Expire   |      Pflags      |
   |  UINT   2     | RAW / R 10    |    %x77    | LEVEL-A    5     |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   :                  Parameter   Data                             :
   |                    0x8000   -   up.                           |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 8: Initial gear state message

Above we see a periodic message indicating that each of the two landing gear are in an up position. If these were the only two landing gear, an alternative representation would be to send a single parameter with a a unit of zero to indicate all gear is in an up position. The attributes of the message are as follows:

src id:
UINT16; This value was set to 2222 decimal at installation time.
message number:
UINT16; 3400 decimal for illustration purposes.
msg class:
UINT8; "OP" value 3 decimal.
message ID:
UINT8; FLIGHTDATA decimal 2
flags:
UINT16; LEVEL-A decimal 5; See Table 21.
tcid:
t-NONE; See Table 22.
len:
UINT16 ; 0x20 octets.
Parameter (First):
Unit:
UINT16; Decimal 1 for landing gear unit 1
SubUnit:
UINT16; 0
Parameter Data Len:
11 bits; decimal 4.
Ident:
21 bits; LDGGEAR - Landing Gear State, value %x00.00.b2 See Section 4.7.
Format:
UINT (OCTET): decimal 2. See Section 4.3.
Confidence:
decimal 10 (OCTET): RAW. It is the value reported by the actuator. See Table 23.
Expire:
OCTET; Time to live. %x77 to expire in 2.9 seconds. See Section 4.2.2 for encoding.
Pflags:
LEVEL-A (OCTET) decimal 5. See Table 21
Parameter Data:
*(OCTET) value is 0x8000.
Parameter (Second):
Unit:
UINT16; Decimal 2 for landing gear unit 2
SubUnit:
UINT16; 0
Parameter Data Len:
11 bits; decimal 4.
Ident:
21 bits; LDGGEAR - Landing Gear State, value %x00.00.b2 See Section 4.7.
Format:
UINT (OCTET): decimal 2. See Section 4.3.
Confidence:
decimal 10 (OCTET): RAW. It is the value reported by the actuator. See Table 23.
Expire:
OCTET; Time to live. %x77 to expire in 2.9 seconds. See Section 4.2.2 for encoding.
Pflags:
LEVEL-A (OCTET) decimal 5. See Table 21
Parameter Data:
*(OCTET) value is 0x8000.

6.2.2. Gear Position Request 





                        1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |           src id              |      message number           |
   |            1001               |          2001                 |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |   msg class   | message ID    |       flags                   |
   |   3 = OP      | FLIGHTDATA 2  |    LEVEL-A    5               |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |              tcid             |          len                  |
   |       NONE    0               |          %x10                 |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |             Unit              |           SubUnit             |
   |               0               |             0                 |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |  Parameter Data Len   |              Ident                    |
   |          4            |        LDGGEARREQ  %x00.00.b3         |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |     Format    |  Confidence   |   Expire   |      Pflags      |
   |  UINT   2     | RAW / R 10    |    %x00    | LEVEL-A    5     |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   :                  Parameter   Data                             :
   |                       0x0001, down.                           |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 9: Request Gear Position Down

Below we see an example message that could have been made by a landing gear button.

src id:
UINT16; This value was set to 1001 decimal at installation time.
message number:
UINT16; 2001 decimal for illustration purposes.
msg class:
UINT8; "OP" value 3 decimal.
message ID:
UINT8; FLIGHTDATA decimal 2
flags:
UINT16; LEVEL-A decimal 5; See Table 21.
tcid:
t-NONE; See Table 22.
len:
UINT16 ; 0x10 or 16 decimal octets.
Parameter (Only):
Unit:
UINT16; Decimal 0 for the plane's landing gear.
SubUnit:
UINT16; 0
Parameter Data Len:
11 bits; decimal 4.
Ident:
21 bits; LDGGEARREQ - Landing Gear State Request, value %x00.00.b3 See Section 4.7.
Format:
UINT (OCTET): decimal 2. See Section 4.3.
Confidence:
decimal 192 (OCTET): USERSEL. See Table 23.
Expire:
OCTET; Time to live. %x00 to not expire. See Section 4.2.2 for encoding.
Pflags:
LEVEL-A (OCTET) decimal 5. See Table 21
Parameter Data:
*(OCTET) 0x0001, down.

6.2.3. First Changed Gear State Message 




                        1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |           src id              |      message number           |
   |            2222               |          3401                 |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |   msg class   | message ID    |       flags                   |
   |   3 = OP      | FLIGHTDATA 2  |    LEVEL-A    5               |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |              tcid             |            len                |
   |       NONE    0               |           %x20                |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |             Unit              |           SubUnit             |
   |               1               |             0                 |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |  Parameter Data Len   |              Ident                    |
   |          4            |  LDGGEAR %x00.00.b2                |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |     Format    |  Confidence   |   Expire   |      Pflags      |
   |  UINT   2     | RAW / R 10    |    %x77    | LEVEL-A    5     |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   :                  Parameter   Data                             :
   |                     0x3901, in transit                           |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |             Unit              |           SubUnit             |
   |               2               |             0                 |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |  Parameter Data Len   |              Ident                    |
   |          4            |  LDGGEAR %x00.00.b2                |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |     Format    |  Confidence   |   Expire   |      Pflags      |
   |  UINT   2     | RAW / R 10    |    %x77    | LEVEL-A    5     |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   :                  Parameter   Data                             :
   |                   0x4121, in transit                          |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 10: First Changed Gear State Message

The above message was sent while the landing gear was in transit. It shows the position values for each gear to be different, but both in transit. The expiry is set to 0x77 and about 2.9 seconds as the sending node intends to send updates at least once per second. The longer time period accounting for potential losses.

src id:
UINT16; This value was set to 2222 decimal at installation time.
message number:
UINT16; 3401 decimal for illustration purposes.
msg class:
UINT8; "OP" value 3 decimal.
message ID:
UINT8; FLIGHTDATA decimal 2
flags:
UINT16; LEVEL-A decimal 5; See Table 21.
tcid:
t-NONE; See Table 22.
len:
UINT16 ; 0x20 octets.
Parameter (First):
Unit:
UINT16; Decimal 1 for landing gear unit 1
SubUnit:
UINT16; 0
Parameter Data Len:
11 bits; decimal 4.
Ident:
21 bits; LDGGEAR - Landing Gear State, value %x00.00.b2 See Section 4.7.
Format:
UINT (OCTET): decimal 2. See Section 4.3.
Confidence:
decimal 10 (OCTET): RAW. It is the value reported by the actuator. See Table 23.
Expire:
OCTET; Time to live. %x77 to expire in 2.9 seconds. See Section 4.2.2 for encoding.
Pflags:
LEVEL-A (OCTET) decimal 5. See Table 21
Parameter Data:
*(OCTET) value is 0x3901, in transit .
Parameter (Second):
Unit:
UINT16; Decimal 2 for landing gear unit 2
SubUnit:
UINT16; 0
Parameter Data Len:
11 bits; decimal 4.
Ident:
21 bits; LDGGEAR - Landing Gear State, value %x00.00.b2 See Section 4.7.
Format:
UINT (OCTET): decimal 2. See Section 4.3.
Confidence:
decimal 10 (OCTET): RAW. It is the value reported by the actuator. See Table 23.
Expire:
OCTET; Time to live. %x77 to expire in 2.9 seconds. See Section 4.2.2 for encoding.
Pflags:
LEVEL-A (OCTET) decimal 5. See Table 21
Parameter Data:
*(OCTET) value is 0x4121, in transit.

6.2.4. Final Gear State Message 




                        1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |           src id              |      message number           |
   |            2222               |          3402                 |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |   msg class   | message ID    |       flags                   |
   |   3 = OP      | FLIGHTDATA 2  |    LEVEL-A    5               |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |              tcid             |            len                |
   |       NONE    0               |            %x20               |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |             Unit              |           SubUnit             |
   |               1               |             0                 |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |  Parameter Data Len   |              Ident                    |
   |          4            |  LDGGEAR %x00.00.b2                |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |     Format    |  Confidence   |   Expire   |      Pflags      |
   |  UINT   2     | RAW / R 10    |    %xDB    | LEVEL-A    5     |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   :                  Parameter   Data                             :
   |                     0x0001, down.                             |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |             Unit              |           SubUnit             |
   |               2               |             0                 |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |  Parameter Data Len   |              Ident                    |
   |          4            |  LDGGEAR %x00.00.b2                |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |     Format    |  Confidence   |   Expire   |      Pflags      |
   |  UINT   2     | RAW / R 10    |    %xDB    | LEVEL-A    5     |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   :                  Parameter   Data                             :
   |                     0x0001, down.                             |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 11: Final Gear State Message

The mesage above indicates that both landing gear are down (value 0x0001) and the message expiry has increased to 0xDB, or about 59 seconds. Since the gear are now in a static position, the node only intends to send updates every 20 seconds or so following the expire a message at about three times the sending frequency. In practice, to ensure delivery the long expiry should be introduced after at least one prior notification that it reached that state.

src id:
UINT16; This value was set to 2222 decimal at installation time.
message number:
UINT16; 3402 decimal for illustration purposes.
msg class:
UINT8; "OP" value 3 decimal.
message ID:
UINT8; FLIGHTDATA decimal 2
flags:
UINT16; LEVEL-A decimal 5; See Table 21.
tcid:
t-NONE; See Table 22.
len:
UINT16 ; 0x20 octets.
Parameter (First):
Unit:
UINT16; Decimal 1 for landing gear unit 1
SubUnit:
UINT16; 0
Parameter Data Len:
11 bits; decimal 4.
Ident:
21 bits; LDGGEAR - Landing Gear State, value %x00.00.b2 See Section 4.7.
Format:
UINT (OCTET): decimal 2. See Section 4.3.
Confidence:
decimal 10 (OCTET): RAW. It is the value reported by the actuator. See Table 23.
Expire:
OCTET; Time to live. %x77 to expire in 2.9 seconds. See Section 4.2.2 for encoding.
Pflags:
LEVEL-A (OCTET) decimal 5. See Table 21
Parameter Data:
*(OCTET) value is 0x0001, down.
Parameter (Second):
Unit:
UINT16; Decimal 2 for landing gear unit 2
SubUnit:
UINT16; 0
Parameter Data Len:
11 bits; decimal 4.
Ident:
21 bits; LDGGEAR - Landing Gear State, value %x00.00.b2 See Section 4.7.
Format:
UINT (OCTET): decimal 2. See Section 4.3.
Confidence:
decimal 10 (OCTET): RAW. It is the value reported by the actuator. See Table 23.
Expire:
OCTET; Time to live. %x77 to expire in 2.9 seconds. See Section 4.2.2 for encoding.
Pflags:
LEVEL-A (OCTET) decimal 5. See Table 21
Parameter Data:
*(OCTET) value is 0x0001, down.

7. IANA Considerations

This memo includes no request to IANA.

8. Security Considerations

This document should not affect the security of the Internet.

This protocol is currently designed to be deployed on an isolated private network. As such, message encryption, authenticity, and modification detection are not protocol priorities.

8.1. Interception

Message Interception is not considered a significant threat for XSEDE because there is no private data in the system.

8.2. Impersonation and MITM

Impersonation and Man in the Middle (MITM) are unlikely because normally the network is physically isolated and not routed to other networks. Strategies for signing messages are a future consideration.

8.3. Denial of Service

Due to secure installation and physical isolation, Denial of Service is not a significant concern.

9. References

9.1. Normative References

[RFC0768]
Postel, J., "User Datagram Protocol", STD 6, RFC 768, DOI 10.17487/RFC0768, , <https://www.rfc-editor.org/info/rfc768>.
[RFC0791]
Postel, J., "Internet Protocol", STD 5, RFC 791, DOI 10.17487/RFC0791, , <https://www.rfc-editor.org/info/rfc791>.
[RFC2640]
Curtin, B., "Internationalization of the File Transfer Protocol", RFC 2640, DOI 10.17487/RFC2640, , <https://www.rfc-editor.org/info/rfc2640>.
[RFC8174]
Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC 2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174, , <https://www.rfc-editor.org/info/rfc8174>.
[IEEE8023]
IEEE, "IEEE Standard for Ethernet", DOI 10.1109/ieeestd.2018.8457469, , <https://doi.org/10.1109/ieeestd.2018.8457469>.
[DO-178C]
RTCA - Radio Technical Commission for Aeronautics, "DO-178C - Software Considerations in Airborne Systems and Equipment Certification", , <https://my.rtca.org/productdetails?id=a1B36000001IcmrEAC>.
[GDL90]
Garmin International, Inc., "GDL 90 Data Interface Specification", , <https://www.faa.gov/sites/faa.gov/files/air_traffic/technology/adsb/archival/GDL90_Public_ICD_RevA.PDF>.

9.2. Informative References

[RFC5771]
Cotton, M., Vegoda, L., and D. Meyer, "IANA Guidelines for IPv4 Multicast Address Assignments", BCP 51, RFC 5771, DOI 10.17487/RFC5771, , <https://www.rfc-editor.org/info/rfc5771>.
[RFC2119]
Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, , <https://www.rfc-editor.org/info/rfc2119>.

Authors' Addresses

Mark Spencer
Avilution
Huntsville, AL
United States of America
Edward T Guy, III (editor)
Bloomberg
New York, NY
United States of America
Nick Hartley
Avilution
Huntsville, AL
United States of America