Example for Parameter Call-up: EQ/SYS/LAB/SDI = 1A/2/156/01
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Parameter Alpha Call-Up (ACU) For all the parameters an alpha code is mentioned in the parameter list. The selection is performed by their alpha codes. If parameters from two systems are available, both parameters are displayed on the MCDU upon a single alpha call-up code entry. The display values refresh once per second. All numeric type alpha call-up parameters show on the MCDU in engineering units. The display format is a floating point representation of max. 6 characters including the decimal point and the '-' sign, if applicable. In case of positive numbers without decimal points all 6 characters are available for digits. Display of leading zero is suppressed. The applicable units are displayed below the alpha call-up code on the MCDU screen. Alpha call-up parameters, which consist of a combination of several discrete bits or packed discretes show in HEX. Discrete alpha call-up parameters show on the MCDU by using English status indications of max. 6 characters together with the actual bit status. The unit indication on the MCDU screen is 'DISCRETE'.
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Additional Parameter Programming If a new label (parameter) is used in the FDIMU (for other than a parameter label call-up) it must be programmed via the GSE.
R 1EFF : 106-149, 211-299, 301-399, 401-499, 1 31-36-00Page 64 1 1 Config-2 Aug 01/05 1 1 1CES 1
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Test Input Parameters The FDIMU DITS ports no. 49 and 50 are dedicated test inputs. These ports are wired to the FDIMU rear connector and to the FDIMU test connectors. The test connector allows access to all ARINC 429 buses in the aircraft. The FDIMU DITS 'Test Inputs' are referenced with the GSE programmable equipment code.
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Additional Bus If an additional ARINC 429 Bus is connected to one of the FDIMU ports, the characteristics of the new bus (transmission speed, equipment code, system number) is programmable via the GSE for the appropriate port number. The new parameter is used for the purpose of no limitation label call-up, trigger logics, data recording and reports.
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Engineering Unit Conversion (EUC) The FDIMU provides an 'Engineering Unit Conversion Table' to convert a selected group of input parameters (same as supplied with alpha call-ups) into the applicable engineering units. The EUC table is associated to the alpha call-up table. The GSE reconfiguration software lets you add or modify the conversion constants. Modifications are made by specifying a single scale constant, number of data bits and sign.
(10) Special Rules for Kg and Deg C All parameters for which an alpha acronym is defined in the parameter list is available for alpha call-up. With a single call-up system 1 and 2 parameters are displayed in engineering units. The FDIMU observe bit 18 and bit 27 of DMC label 305. If bit 18 = 1, then the parameter values are shown in print out and alpha call-up in
the following units:
fuel flow (eng 1 and 2): lbs/hours instead of Kg/hours
(7C.1.244.01, 7C.2.244.10)
gross weight: lbs instead of Kg
(02.1.075.00, 02.2.075.00)
pack flow: lbs/sec instead of Kg/sec
(8E.1.126.11, 8E.2.126.00)
bleed air flow: lbs/sec instead of Kg/sec
(7A.1.123.01)
fuel quantity: lbs instead of Kg
(5A.2.256.10, 5A.2.257.10,
5A.2.260.10, 5A.2.261.10,
5A.2.262.10, 5A.2.247.10)
R 1EFF : 106-149, 211-299, 301-399, 401-499, 1 31-36-00Page 65 1 1 Config-2 Aug 01/05 1 1 1CES 1 If bit 27 = 1, then the parameter values are shown in print out and
alpha call-up in the following units: comfort temperatures ckpt, cab temp: deg F instead of deg C (29.1.242.01, 29.2.242.01,
29.1.244.01, 29.2.244.01,
29.1.245.01, 29.2.245.01)
(11) Flight Phase Detection (Ref. Fig. 007) The FDIMU divides the flight leg into separate flight phases. The flight phase determination is mainly based on the FWC (Param.
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