R C. FDIMU (DMU-part) Input Parameters
R All FDIMU (DMU-part) parameters are listed in the parameters list. The
R FDIMU uses these parameters to perform the various functions. Also the
R FDIMU internal parameters and parameters on Output Bus A+B and listed in
R the parameters list. For all calculations, logical decisions and
R parameters to be included in a print report only valid parameters are
R used. If there is no valid parameter available, the corresponding
R parameter column is filled with '<'.
R If a parameter, which is defined to be included in a print report, is not
R transmitted on the appropriate 'ARINC' bus, the corresponding data field
R is filled with '>'. If a parameter, which is used for a logical decision,
R is invalid or not transmitted during the whole flight phase, (in which it
R is intended to be used), this causes a class 3 fault. For average
R calculations valid parameters only are used. The validity of a parameter
R is detected by monitoring the SSM bits. Also the parity bit of the
R appropriate ARINC 429 word. If a parameter fail is detected, the
R alternative system 2 parameter is used if possible. If an alternative
R parameter is used, this is indicated by an associated to the parameter
R number, for all the various functional descriptions.
R If a parameter which is used for logics is invalid or not transmitted, or
R an alternative parameter is not available, the previous good value is
R used for up to three reads. After three consecutive reads this parameter
R is marked as failed and the logic is not performed.
R Means are provided to observe also those busses which are not permanently
R used for the logics or reports.
R **ON A/C ALL
D. Procedure for the Fuel Flow Parameter
The parameter FF (7C.1.244.01 for eng 1 and 7C.2.244.10 for eng 2) is
marked as failed after 10 consecutive reads of no or not valid data.
Up to this moment the previous good value is used for the logics and the
reports.
E. Explanations to the Parameter List
The parameter list is organized according to the connected ARINC 429 data
buses.
The connected systems (e.g. FAC, ECU, EEC, etc.) and the corresponding
ATA chapter numbers are stated in the header on the left side of each
page of the parameter lists.
R 1EFF : ALL 1 31-37-00Page 7 1 1 May 01/04 1 1 1CES 1
R **ON A/C 001-049, 051-099, 101-105, 151-199, 201-210,
The columns are described as follows:
--------------------------------------------------------------------Column | Description -------------------|------------------------------------------------
1st | EQ.SYS.LAB.SDI = Parameternumber
SYS.LAB.SDI |
| System number: According to the system which is
| sending out the corresponding parameter:
| 1 for system one
| 2 for system two
| 3 for system three
| Label of the parameter, octal value
| according to ARINC 429.
| SDI states the Source/Destination Identifier
| which is used by the system for the
| corresponding parameter:
| 00 means SDI 00 (0)
| 01 means SDI 01 (1)
| 10 means SDI 10 (2)
| 11 means SDI 11 (3)
-------------------|------------------------------------------------2nd | PARAMETER PARAMETER | Parameter Name -------------------|------------------------------------------------
3rd | RANGE
RANGE |
| Three different types of ranges are shown in
| this column:
| The first one, indicated by a 'W' (WORDRANGE),
| is related to the ARINC 429 data bus. This
| shows the maximum value of the parameter that
| can be transferred on the bus. This
| depends on the number of data bits (see
| column DATA BITS) and the resolution ('R') of
| the parameter (see column ACCURACY).
| The second one, with no specific indication,
| shows the normal operational range of the
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