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| | SPEED | | | | | | (HIGH | WIRED | | | | | SPEED,| TO DMC| PROCESSED | | | | LOW | No. | BY DMC No.| | | | SPEED | 1 2 3 | 1 2 | | |-------------------|-------|-------|-----------|----------------------------| | ECU 1 A1 | LS | X X | X | A when ECU 1 (2) primary | | (FADEC 1 A2 | LS | X | X | channel A1 (or B1) fails. | | system) 1 B1 | LS | X X | X X | If not valid on channel in | | 1 B2 | LS | X | | control, label is taken | | 2 A1 | LS | X X | X | from the other channel. | | 2 A2 | LS | X | X | | | 2 B1 | LS | X X | X X | | | 2 B1 | LS | X | | | |-------------------|-------|-------|-----------|----------------------------| | ECAM CTL PNL 2 | LS | X X X | N N | | |-------------------|-------|-------|-----------|----------------------------| | FQI 1-A | LS | X X | N | A when the channel | | 1-B | LS | X | N | superiority signal controls| | 2-A | LS | X | A | the change over to the | | 2-B | LS | X X | A | other bus, or when the | | | | | | normal bus becomes faulty | |-------------------|-------|-------|-----------|----------------------------| | CFDIU (GENERAL | LS | X X X | X X | | | O/P INTERROGATION | | | | | | BUS) | | | | | |-------------------|-------|-------|-----------|----------------------------| | FCDC 1 | LS | X X X | X X | If not valid on onside | | 2 | | X X X | X X | bus, label is taken from | | | | | | the offside bus. | |-------------------|-------|-------|-----------|----------------------------| | LGCIU 1 | LS | X X X | X X | | | 2 | LS | X X X | X X | | |-------------------|-------|-------|-----------|----------------------------|
1EFF : 106-149, 303-399, 1 31-68-00Page 29 1 1 Config-3 Aug 01/05 1 1 1CES 1 Normally, the DMC 1 and 2 use their onside sources for display: e.g., the DMC 1 uses the ADC 1, IRS 1, FMGC 1,... buses and likewise for the DMC 2 (ADC 2, IRS 2, FMGC 2, ...). Behaviour of the DMC 3 is identical to that of the DMC 1 when the EIS DMC selector switch is on NORM or CAPT/3 and to that of the DMC 2 when the EIS DMC selector switch is on F/O/3. When the EIS DMC selector switch is set to NORM or CAPT/3 the DMC 1 or DMC 3 is called: DMC ON SIDE 1. When the selector switch is set F/O/3, the DMC 2 or DMC 3 is called: DMC ON SIDE 2. In case of failure of a given source, the DMC switches over to the corresponding offside source (e.g. FAC 2, FQI 2, ... for the DMC 1), or to the No. 3 source (in the case of the ADR and IR buses). This switching is automatic in the former case and manual in the latter case. As regards the radio-nav sources (ILS, VOR, DME, ADF), there is no switching, neither automatic nor manual.
A. ARINC 429 Buses
(1) ADIRU-IR buses The DMCs 1, 2 and 3 select for display the IR data from the ADIRU 1, 2 or 3 according to the logic given in the table below:
-------------------------------------------------------------------------------|EIS DMC SELEC-|ATT/HDG SELEC-| DMC 1 | DMC 2 | DMC 3 | | TOR SWITCH | TOR SWITCH | | | | |--------------|--------------|---------------|---------------|---------------| | NORM | NORM | IRS 1 | IRS 2 | IRS 1 | | NORM | CAPT/3 | IRS 3 | IRS 2 | IRS 3 | | NORM | F/O/3 | IRS 1 | IRS 3 | IRS 1 | | CAPT/3 | NORM | IRS 1 | IRS 2 | IRS 1 | | CAPT/3 | CAPT/3 | IRS 3 | IRS 2 | IRS 3 | | CAPT/3 | F/O/3 | IRS 1 | IRS 3 | IRS 1 | | F/O/3 | NORM | IRS 1 | IRS 2 | IRS 2 | | F/O/3 | CAPT/3 | IRS 3 | IRS 2 | IRS 2 | | F/O/3 | F/O/3 | IRS 1 | IRS 3 | IRS 3 | -------------------------------------------------------------------------------
Note that the DMCs do not perform the automatic selection of another IR bus if the one normally used is no longer valid. It is up to the pilot to perform manual selection to another valid IR sensor. Normally, the EIS DMC and/or ATT/HDG manual reconfiguration selections are made only when a DMC 1 or 2 and/or an ADIRU 1 or 2 are faulty. However, they can be made also when those items of equipment operate properly. In that case the DMCs select the IR according to the logic given in the above table.
1EFF : 106-149, 303-399, 1 31-68-00Page 30 1 1 Config-3 Aug 01/05 1 1 1CES 1
(2)
ADIRU-ADR buses The ADIRU ADR bus selection inside the DMCs follows exactly the same rules as the IR bus selection. Note that the IR and ADR manual reconfiguration selections are completely independent.
(3)
FAC buses Each DMC receives the FAC 1 and 2 buses. The FAC 1 or FAC 2 bus selection inside each DMC is automatic according to the logic given in the table below:
-------------------------------------------------------------------------------| FAC 1 | FAC 2 | DMC | DMC | | VALID | VALID | SIDE 1 | SIDE 2 | |-------|-------|------------------------------|------------------------------| | Y | Y | FAC 1 | FAC 2 | |-------|-------|------------------------------|------------------------------| | Y | N | FAC 1 | FAC 1 (*) | | | | | (message on ECAM) | |-------|-------|------------------------------|------------------------------| | N | Y | FAC 2 (*) | FAC 2 | | | | (message on ECAM) | | |-------|-------|------------------------------|------------------------------| | N | N | FAC 1 <----> FAC 2 | | | | | permanent switching until | | | | | one valid FAC is found. | | | | | Meanwhile, SPD LIM red | | | | | message on CAPT PFD | | -------------------------------------------------------------------------------(*) : Abnormal configuration. When a DMC works with an offside FAC and if
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