Arinc 429 Messaging; Message Set Integrity - Honeywell ASPIRE-400 System Description, Installation And Maintenance Manual

SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
(b)
(c)
(d)
(e)
(f)
(5) If "Failure Warning" was determined as a consequence of execution of Off-line Self Test
then identification of "Failure Warning" as a ARINC-429 word SSM reportable condition of
the HPA and annunciation by Red LED persists until subsequent re-testing (Continuous
BIT or a separate Off-line Self-Test) determines fault conditions attributing to the "Failure
Warning" are cleared.
9.

ARINC 429 Messaging

A.

Message Set Integrity

(1) The HPA does not react to ARINC-429 label 143 HPA Command word if:
(a)
(b)
(2) The HPA does not apply parameter information of the ARINC-429 label 143 HPA
Command word if:
(a)
(b)
(3) If ARINC-429 label 143 HPA Command word is not detected over a sustained period of
greater than 1 second then the HPA reacts by:
(a)
(b)
(c)
(d)
(4) On the successive detection of ARINC-429 label 143 HPA Command word in compliance
with the expected scheduling the HPA reacts as follows:
(a)
EFFECTIVITY
ALL
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ASPIRE-400
If internal faults are confirmed then "Failure Warning" is identified as a ARINC-
429 word SSM reportable condition of the HPA for the following ARINC-429
words:
1 Label 143 HPA Status word
2 Label 350 HPA Maintenance word
3 Label 357 Detector Data word.
Results of the test are recorded as an event in the Event Record log
Corresponding test results are indicated in ARINC-429 label 350 HPA
Maintenance word
The PA function is restored to its enabled/disabled state before entry to
Functional Test execution
The front panel LEDs denote the health status as determined by Self-Test.
The computed parity of the Word is not Odd
The Source Destination ID (SDI) is other than "All Call" or "HPA".
The SSM identifies Failure Warning (FW) of the LRU of the sourced information
The SSM identifies No Computed Data (NCD) of the sourced information.
Identifying "No Computed Data" (Command) as a ARINC-429 word SSM
reportable condition of the HPA to be applied to ARINC-429 label 143 HPA
Status word.
Recording the occurrence of absence of detection as an event in the Event log.
For as long as the condition persists, "No Command" is declared as the state of
indication of "Control Bus Input" of ARINC-429 label 350 HPA Maintenance word
for each affected reporting interval.
For as long as the condition persists, flash the HPA RED LED.
No longer identifying "No Computed Data" (Command) as a ARINC-429 word
SSM reportable condition of the HPA to be applied to ARINC-429 label 143 HPA
Status word until identified otherwise
23-15-49
3rd rvw Draft as of:
29 January, 2020
Page 2-16
22 Apr 2019