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BITE memory structure/type 1 system
-------------------------------------------------------------------------------| ZONE 4 | SHOP USE ONLY | | |-------------------------------------------------------------| | | | TROUBLE | CODED | SNAPSHOT OF FAULTS IN | | | |SHOOTING | INFOR- | LAST 64 FLIGHTS | | | ZONE 2 | DATA | MATION | | INFORMATION | | | | | | TRANSMITTED | |--------|-----------| |-------------------------------| ON THE GROUND | | | | | SNAPSHOT OF FAULTS DETECTED | ON REQUEST | | | | | ON THE GROUND (IF FUNCTION | | | | GROUND | | ACTIVATED BY MENU MODE) | | | | TROUBLE | | | | | ZONE 3 | SHOOTING |--------|-------------------------------| | | | | CLEAR | FAULTS DETECTED ON THE | | | | | LAN-| GROUND (IF FUNCTION ACTIVATED | | | | | GUAGE | BY MENU MODE) | | |--------|-----------| |-------------------------------| | | ZONE 5 | BACK-| | CLASS 3 FAULTS | | |--------| GROUND OF | |-------------------------------| | | | FAILED | | FAULTS IN LAST 63 FLIGHTS | | | | EQUIPMENT | |-------------------------------|---------------| | ZONE 1 | | | FAULTS IN LAST FLIGHT (OR | INFORMATION | | | | | PRESENT FLIGHT) | TRANSMITTED | | | | | | PERMANENTLY | | | | | | ON THE SYSTEM | | | | | | BUS (GROUND | | | | | | OR FLIGHT) |
(5) Type 2 systems (Ref. Fig. 006) Systems with an ARINC 429 output and a discrete input. Type 2 systems are not capable of memorizing data concerning faults that they detect beyond the last flight. Schematically, a Type 2 system BITE consists of 4 zones of non-volatile memory (EEPROM):
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Zone 1 : This zone is used for storing the identity of the LRU declared faulty during the current or the last flight.
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Zone 2 : This zone is used for storing complementary data concerning faults occured during the current or the last flight. This zone is only accessible in the workshop.
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Zone 3 : This zone is used to store the identity of faulty LRUs, for faults that occurred on the ground during the last line stop.
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Zone 4 : This zone is used for storing more detailed data concerning the faults (parts of the LRU). This zone is only accessible in the workshop.
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Memorization of faults in these memories and transmission of these
data to the CFDIU is carried out according to a single operating
mode, Normal Mode.
The input discrete is used to initialize a ground test.
Ref. Table below :
BITE memory structure/type 2 system
------------------------------------------- --- --- ---
| | C | | | | |
| | L | FAULTS DETECTED | | IN | O |
| ZONE 1 | E | DURING LAST FLIGHT | | | N |
| | A | (OR PRESENT FLIGHT) | | FLIGHT | |
| | R | | | | | INFORMATION
|---------| |-----------------------| --- | G | TRANSMITTED
| | L | | | R | PERMANENTLY
| | A | | | O | ON THE
| | N | FAULTS DETECTED ON | | U | SYSTEM BUS
| ZONE 3 | G | THE GROUND (FUNCTION | | N |
| | U | ALWAYS ACTIVATED) | | D |
| | A | | | |
| | G | | | |
| | E | | | |
|-----------------|-----------------------| --- ---
| | C | TROUBLE SHOOTING |
| | O | DATA (FACULTATIVE) |
| ZONE 2 | D | |
| | E | SHOP USE ONLY |
| | D | |
|---------| |-----------------------|
| | I | |
| | N | |
| | F | |
| | O | |
| | R | |
| ZONE 4 | M | SHOP USE ONLY |
| | A | |
| | T | |
| | I | |
| | O | |
| | N | |
(6) Type 3 systems (Ref. Fig. 006) Systems with discrete inputs and outputs only. Type 3 systems are not capable of memorizing beyond the current flight.
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Type 3 system BITEs do not have a memory.
Fault detection and transmission to the CFDIU is carried out by means
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