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Users Manual Part 3

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- For each unique L1-L3 code, maintained across reset/power down, it
records the number of occurrences and the time of the last occurrence.
- For every link the LRU has, it records the status: UNKNOWN (default
after power on), DISABLED, INACTIVE, NO_LAYER_1 (when
applicable), HIGH_PACKET_LOSS, ACTIVE (normal). It also records
if the link is causing a mute of the system.
- For every ARINC 429 label the LRU understands, it records the status:
DISABLED, UNKNOWN (default after power on), ACTIVE,
SSMERROR, MISSING. It also records if the label is causing a mute
of the system.
- For every input discrete the LRU possesses, it records the status:
ASSERTED, DEASSERTED.
- The LRU maintains in memory the reason, if any, for muting.
(2) LRU Codes
BITE event information is encoded by the LRUs in three values. The values are named
L1 thru L3:
L1 denotes the LRU or interface (generated by an LRU on its behalf) which is generating
the event
-
- L2 denotes the Shop Replaceable Module within an LRU for a event relating to an
LRU, or for interfaces it denotes a particular part of the interface which is generating
the event.
- L3 further defines the unique event that occurred.
Each fault or event also has an additional text field which can carry additional information
helpful to understand the fault or event that happened.
The combination of L1 thru L3 alone uniquely identifies a BITE event in the system.
(3) L1 Codes
(a) The event L1 code uses two hexadecimal digits to identify a LRU or an interface
within an AES LRU.
NOTE: All other codes not explicitly stated are spare.
(4) L2 Codes
(a) The event L2 code uses two hexadecimal digits to identify a shop-replaceable
module within an AES LRU:
(b) The event L2 code further identifies specific inter LRU interfaces.
(c) The event L2 code further identifies ARINC 429 and ARINC 791 discrete interfaces,
coded.
(d) The event L2 code further identifies user interfaces.
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EFFECTIVITY
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11 Nov 2020
© Honeywell International Inc. Do not copy without express permission of Honeywell.
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
JetWave™ MCS-8562 Terminal

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