CDU IR Input Labels
NOTE : (1) The complete definition of the labels 270, 277 and
____ 350 is detailed in 34-14-00 Para. 2.D.(1).
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_ The CDU sends the parameters detailed in the following table to the IR portion of each ADIRU:
-------------------------------------------------------------------------------| PARAMETER LIST PARAMETER CHARACTERISTICS (NUMERIC) | -------------------------------------------------------------------------------|EQ.SYS.LAB.SDI|PARAMETER | WORD RANGE |UNIT|SIG |BITS|XMSN|CODE|ALPHA|SOURCE | | |DEFINITION| OPER RANGE | |BIT | |INTV| |CODE |ORIGIN | | |(*=REMARK)| RESOLUTION | | | | | | |BUS No.| | |(X=NOTE) | ACCURACY | | | | | | |ATA REF| | | | | | | | | | |CONV | -------------------------------------------------------------------------------| 041 |SET | 90S-90N |DEG | | 6 | | BCD| | | |LATITUDE | (POSITIVE: |& | | | | | | | | | NORTH) |MIN | | | | | | | | | RESOL = 0.1| | | | | | | |--------------|----------|------------|----|----|----|----|----|-------------| | 042 |SET | 180E-180W |DEG | | 6 | | BCD| | | |LONGITUDE | (POSITIVE: |& | | | | | | | | | EAST) |MIN | | | | | | | | | RESOL = 0.1| | | | | | | |--------------|----------| -----------|----|----|----|----|----|-------------| | 043 |SET | 0-359 |DEG | | 3 | | BCD| | | |MAGNETIC | (POSITIVE: | | | | | | | | |HDG | CW FROM N) | | | | | | | | | | RESOL = 1 | | | | | | | |--------------|----------|------------|----|----|----|----|----|-------------| | 277 |CDU TEST | | | | 19 | | DIS| | -------------------------------------------------------------------------------
CDU Output Labels
(2) ADIRU The ADIRU receives data and computes outputs in accordance with ARINC
738. It uses an ARINC 600 type 2 floating-connector.
(a) Digital inputs
-Air Data Module (ADM) inputs The ADR provides up to five ADM input buses. Only three of them are used to receive air mass data from remotely mounted ADM (Ref. 34-11), two linked to the static probe and one linked to the pitot probe.
NOTE : For the ADIRU 3, only two ADM input buses are used: one
____ for the total pressure data and the other for the averaged static pressure data.
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-digital baro-correction inputs The ADR provides two baro-correction digital data input ports. The incoming data from the Flight Control Unit (FCU) are in ARINC 429 low speed format. The ADR receives data from baro-correction bus A. The baro-correction is used to compensate baro-corrected altitude output.
-initialization data inputs The IR portion of the ADIRU receives data from either ARINC 702 Flight Management and Guidance Computer (FMGC). The data are in ARINC 429 low speed format. The initialization parameters are latitude and longitude or magnetic heading.
-CFDIU input The ADIRU provides one Centralized Fault Display Interface Unit (CFDIU) input bus. The data are in ARINC 429 low speed format. The CFDIU continuously transmits data to all systems. The ADIRU uses these data to accept commands from the CFDIU.
-Air Data Reference inputs The IR portion of the ADIRU provides two digital data input ports for receiving data from the other ADIRUs. The incoming data are in ARINC 429 low speed format and include altitude and true airspeed.
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