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F. Alpha Call-Up List
| ALPHA | PARAMETER | NAME | | CALL UP | NUMBER | | |----------------------------------------------------------------------------| | ZDW1 | 5D.1.060.01| Discrete Data Word | | | 5D.2.060.10| | | | | | | VF | 5D.1.206.01| Cab. Temp. Reg. Vlv. Pos. Group 1 F/D % | | | 5D.2.206.10| | | | | | | VW | 5D.1.207.01| Cab. Temp. Reg. Vlv. Pos. Group 2 FWD % | | | 5D.2.207.10| | | | | | | VA | 5D.1.220.01| Cab. Temp. Reg. Vlv. Pos. Group 3 AFT % | | | 5D.1.220.10| | |----------------------------------------------------------------------------|
R **ON A/C 401-499,
F. Alpha Call-Up List
| ALPHA | PARAMETER | NAME | | CALL UP | NUMBER | | |----------------------------------------------------------------------------| | ZDW1 | 5D.1.060.01| Discrete Data Word | | | 5D.2.060.10| | | | | | | VF | 5D.1.206.01| Trim Air Valve Position Group 1 F/D % | | | 5D.2.206.10| | | | | | | VW | 5D.1.207.01| Trim Air Valve Position Group 2 FWD % | | | 5D.2.207.10| | | | | | | VA | 5D.1.220.01| Trim Air Valve Position Group 3 AFT % | | | 5D.1.220.10| | |----------------------------------------------------------------------------|
**ON A/C ALL
6. Component Description
_____________________R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
A. Zone Controller (Ref. Fig. 009) The zone controller 8HK is a 4 MCU box (to ARINC 600), it consists of a primary computer and an electrically independent-secondary computer. This secondary computer acts as a back-up if there is a primary computer failure. The primary computer will give a reduced control of the system when there is a partial loss of signals to it (under certain conditions). The secondary computer will take over command of the system (at a reduced level), if there is a failure of the primary computer. The functions of the zone controller are as follows:
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to maintain constant temperatures at a preselected value in the cockpit, fwd cabin and aft cabin zones,
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to compute and deliver a demand signal for both pack controllers 7HH (27HH) as a reference for the pack temperature-control system.
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to elaborate a pack flow demand and supply it to both pack controllers 7HH (27HH),
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to elaborate a demand signal to the APU control,
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to elaborate and deliver an engine rpm modulation to FADEC in order to get the necessary bleed pressure,
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to give to FADEC a bleed-air valve status,
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to give BITE information on the wing anti-ice system to CFDS,
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to give BITE information of the ZC and both PCs to the CFDS,
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to perform overheat detection and corrective action,
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to calibrate, code and deliver information for the CRT displays,
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to reduce crew workload with the elimination of manual control. The system detects its own failures, and takes the necessary actions to overcome these failures automatically.
Table 1 shows how the zone controller functions are divided between the primary and secondary computer.
Table 1 (Primary and Secondary Computer Functions)
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Zone Contoller Location
Figure 009
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-----------------------------------------------------------------------------| FUNCTION | PRIMARY | SECONDARY| |--------------------------------------------|---------------|---------------| |Zone temp. control to selected temps. | YES | NO | |Zone temp. to constant 24 DEG.C (75.2 DEG.F)| NO | YES | |Trim Modulating Valve Control | YES | NO | |Trim-Air Pressure Regulating Valve Opening | YES | NO | |Trim-Air Pressure Regulating Valve Closing | YES | YES | |Flow demand optimisation | YES | NO | |Failure analysis | YES | YES | |BITE | YES | YES | |BITE storage and trans. to CFDS | NO | YES | |ECAM indications | YES | YES | |Data handling | YES | YES | |Overheat detection and indication | YES | YES | |ATA 36 Bleed Valve status | NO | YES | |ATA 30 Wing Anti-Ice status | NO | YES | |ATA 30 Nacelle Anti-Ice status | NO | YES | |ATA 30 Wing Anti-Ice failure | NO | YES | |analysis and trans. to CFDS | | | |Fan monitoring | YES | NO | -----------------------------------------------------------------------------
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