(3) Discrete inputs
Table 1 gives the identification of the ADM discrete inputs:
--------------------------------------------| ADM Pin | Identification | --------------------------------------------| K | SDI 1 (LSB) (2) | | L | SDI 2 (MSB) (2) | | M | Configuration code 1 (3) | | N | Configuration code 2 (3) | | P | Parity (1) | --------------------------------------------
Table 1 = Discrete Inputs
NOTE : (1) An odd number of pins K, L, M, N and P must be grounded to
____ signify a valid installation. After the desired Source Data Identifier (SDI) and the configuration pins have been selected, the parity pin P must be selectively left open or grounded to ensure that an odd number of pins K through P inclusive have been grounded.
NOTE : (2) Program pins used for identification of the installation
____ position on the aircraft and the corresponding SDI code to be transmitted. The code definition is provided in table 2.
NOTE : (3) The ADM transmits the measured pressure with a label
____ depending on the configuration code input discretes. The configuration code definition is provided in table 3.
------------------------------------------------------------------------|Input discrete SDI output |Input discrete SDI output |Installation| | pin L Bit 10 state| pin K Bit 09 state| | |----------------------------------------------------------------------| | open 0 | open 0 | Invalid | | open 0 | ground 1 | 1 | | ground 1 | open 0 | 2 | | ground 1 | ground 1 | 3 | ------------------------------------------------------------------------
Table 2 = SDI Code
R 1EFF : 001-049, 101-105, 151-199, 201-203, 1 34-11-00Page 20 1 1 Config-1 May 01/05 1 1 1CES 1
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| Installation function | Config. code 1 | Config. code 2 | Label | | | Pin N | Pin M | | |-------------------------------------------------------------------| | Total pressure | open | open | 242 | | Left static pressure | open | ground | 176 | | Right static pressure | ground | open | 177 | | Averaged static | ground | ground | 245 | | pressure (uncorrected)| | | | ---------------------------------------------------------------------
Table 3 = Configuration Code
(4) Output bus All data are transmitted via a single ARINC 429 low-speed serial digital output bus. The outputs from the ADM are a single pressure word having an installation selectable label, two discrete data words, and two identification words. The following table gives:
-EQ.SYS.LAB.SDI: (SDAC, FWC, DMC...) output label for which the parameter is available
-PARAMETER DEFINITION: parameter name
-WORD RANGE/OPER RANGE/RESOLUTION ACCURACY: measurement range. Maximum value transmitted. When the digital value changes, the change step is equal to the accuracy
-UNIT: unit in which the digital value is transmitted
-SIG BIT: indicates whether a sign bit is available
-BITS: number of bits used by the parameter in the label
-XMSN/INTV: output transmission interval. The refresh rate is given in milliseconds
-CODE :
BNR: binary data word
BCD: binary coded decimal data word
ISO: data word coded in ISO5 code
DIS: discrete data word
HEX: hexadecimal coded
HYB: mixed code parameters are given in the table 4 below:
-ALPHA CODE: indicates the parameter mnemonic code
-SOURCE ORIGIN: parameter source computer or system.
All these parameters are given in the table 4 below:
R 1EFF : 001-049, 101-105, 151-199, 201-203, 1 34-11-00Page 21 1 1 Config-1 May 01/05 1 1 1CES 1
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| 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 | -------------------------------------------------------------------------------| 242 |TOTAL |100-1400 |hPa | | 18 |29- |BNR | | | | |PRESSURE |+/- 0.25 | | | |31 | | | | |--------------|----------|------------|----|----|----|----|----|-----|-------| | 176 |LEFT STAT |100-1100 |hPa | | 18 |29- |BNR | | | | |PRESSURE |+/- 0.25 | | | |31 | | | | |--------------|----------|------------|----|----|----|----|----|-----|-------| | 177 |RIGHT STAT|100-1100 |hPa | | 18 |29- |BNR | | | | |PRESSURE |+/- 0.25 | | | |31 | | | | |--------------|----------|------------|----|----|----|----|----|-----|-------| | 245 |AVERAGED |100-1100 |hPa | | 18 |29- |BNR | | | | |STATIC |+/- 0.25 | | | |31 | | | | | |PRESSURE | | | | | | | | | | |(UNCORRTD)| | | | | | | | | |--------------|----------|------------|----|----|----|----|----|-----|-------| | 270 |DISCRETE |Table 5 | | | |250-|BCD | | | | |WORD 1 | | | | |500 | | | | |--------------|----------|------------|----|----|----|----|----|-----|-------| | 271 |DISCRETE |Table 6 | | | |250-|BCD | | | | |WORD 2 | | | | |500 | | | | |--------------|----------|------------|----|----|----|----|----|-----|-------| | 377 |EQUIPMENT |Table 7 | | | |250-|BCD | | | | |IDENT | | | | |500 | | | | |--------------|----------|------------|----|----|----|----|----|-----|-------| | 040 |SOFTWARE |Table 8 | | | |250-|BCD | | | | |IDENT | | | | |500 | | | | -------------------------------------------------------------------------------
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