EIS Relay Boxes - DME AUDIO VOR/ILS Selection Control
Figure 008
R 1EFF : 001-049, 051-099, 101-105, 151-199, 1 31-68-00Page 17/18 1201-299, 301-302, 1Config-1 May 01/05 1 1 1CES When the ECAM/ND XFR selector switch is set to CAPT, the System (or Status) image is displayed on the CAPT ND, and the Engine/Warning image is displayed on the lower ECAM DU, to inform the crew that this image is generated by the DMC2.
The management of all the possible ECAM display configurations requires the three DMCs exchanging between them information on their working configuration for ECAM display. To this end, each DMC generates a wired discrete signal: ECAM CHANNEL AVAIL, signalling that its ECAM processor is valid and it is in relation with one valid ECAM DU. Each DMC sends this signal to the two others.
The DMC in charge of displaying an ECAM image on its related ECAM DU then knows which image to draw: E/W (in Normal or in Single display mode) or System/Status and through which input this image must be sent to the ECAM DU: NORMAL or ALTERNATE. To this end, it sends a wired discrete signal in parallel to the two ECAM DUs (ECAM DU ALTERNATE CONTROL) in the following cases:
*
ECAM/ND F/O transfer and DMC 1 ALTERNATE CONTROL demand (such is the case when the upper ECAM DU has failed)
*
ECAM/ND CAPT transfer and DMC 2 ALTERNATE CONTROL demand (such is the case when the lower ECAM DU has failed).
The two ECAM DUs always use their Normal or their Alternate input
simultaneously.
(Ref. Fig. 009)
TABLE: ECAM DISPLAY CONFIGURATIONS
-------------------------------------------------------------------------------|CASE|DMC1/2/3| CREW | DISPATCHING OF ECAM IMAGES : | | NR |CONDITN |TRANSFER | DU INPUT (N or A) - SOURCE DMC and | | | |SELECTION| ECAM PROCESSOR OPERATING MODE(E/W - S - MONO ) | | | | |------------------------------------------------------| | | | CAPT ND | UP ECAM DU | LO ECAM DU | F/O ND | -------------------------------------------------------------------------------| 1 | NORM | NORM | ND | E/W (N) | S(N) | ND | | | | | |DMC1 in E/W | DMC2 in S | | | 2 | NORM | ECAM/ND | ND | E/W (N) | / | S (N) | | | | F/O | |DMC1 in E/W | (diagonal) | DMC2 in S | | 3 | NORM | ECAM/ND | S (N) | / | E/W (N) | ND | | | | CAPT | DMC1 in S | (diagonal) |DMC2 in E/W | | | 4 | DMC1 | NORM | / | / | E/W (N) | ND | | | FAILED | | (diagonal) | |DMC2 in MONO| | | 5 | DMC2 | NORM | ND | E/W (N) | / | / | | | FAILED | | |DMC1 in MONO| | | | 6 | NORM | NORM | ND | X | E/W (N) | ND | | | | | |(DU failed) |DMC2 in MONO| |
R 1EFF : 001-049, 051-099, 101-105, 151-199, 1 31-68-00Page 19 1201-299, 301-302, 1Config-1 May 01/05 1 1 1CES 1
ECAM DUs - Normal/Alternate Inputs Control
Figure 009
R 1EFF : 001-049, 051-099, 101-105, 151-199, 1 31-68-00Page 20 1201-299, 301-302, 1Config-1 May 01/05 1 1 1CES 1 -------------------------------------------------------------------------------|CASE|DMC1/2/3| CREW | DISPATCHING OF ECAM IMAGES : | | NR |CONDITN |TRANSFER | DU INPUT (N or A) - SOURCE DMC and | | | |SELECTION| ECAM PROCESSOR OPERATING MODE(E/W - S - MONO ) | | | | |------------------------------------------------------| | | | CAPT ND | UP ECAM DU | LO ECAM DU | F/O ND | -------------------------------------------------------------------------------| 7 | NORM |ECAM/ND | ND | X | E/W (A) | S (N) | | | | F/O | |(DU failed) |DMC1 in E/W | DMC2 in S | | 8 | NORM | ECAM/ND | S (N) | X | E/W (N) | ND | | | | CAPT | DMC1 in S |(DU failed) | DMC2 in E/W| | | 9 | NORM | NORM | ND | E/W (N) | X | ND | | | | | |DMC1 in MONO|(DU failed) | | | 10 | NORM | ECAM/ND | ND | E/W (N) | X | S (N) | | | | F/O | |DMC1 in E/W |(DU failed) | DMC2 in S | | 11 | NORM | ECAM/ND | S (N) | E/W (A) | X | ND | | | | CAPT | DMC1 in S |DMC2 in E/W |(DU failed) | | | 12 | NORM | ECAM/ND | ND | X | X | E/W (N) | | | | F/O | |(DU failed) |(DU failed) | DMC2 in MONO | | 13 | NORM | ECAM/ND | E/W (N) | X | X | ND | | | | CAPT |DMC1 in MONO|(DU failed) |(DU failed) | |
R 1EFF : 001-049, 051-099, 101-105, 151-199, 1 31-68-00Page 21 1201-299, 301-302, 1Config-1 May 01/05 1 1 1CES 1 At last, the following table gives the operational consequences after the loss of one or several EIS items of equipment.
------------------------------------------------------------------------------| FAILURE | OPERATIONAL CONSEQUENCE | |-------------|--------------------------------------------------------------| | 1DMC | NO | |-------------|--------------------------------------------------------------| | 2DMCs | - Loss of PFD and ND images on either CAPT or F/O instrument | | | panel. | | | - Loss of ECAM System/Status image (possibility to display | | | a System or Status image temporarily). | |-------------|--------------------------------------------------------------| | 1 EIS DU | Loss of ND image on the corresponding main instrument panel. | | | Possibility to get the ND image back by means of the PFD ND | | | XFR P/BSW. | |-------------|--------------------------------------------------------------| | FCU single | In case of FCU channel 1 (or 2) failure, the DMCs still | | failure | receive the FCU channel 2 (1) information, which carries | | | along all the CAPT and F/O selections. There is an automatic | | | switch over inside the FCU. | |-------------|--------------------------------------------------------------| | UPPER ECAM | Automatic transfer of the Engine/Warning (E/W) image on the | | DU | lower ECAM DU and subsequent loss of the System/Status | | | image. | | | - Possibility to display the S image temporarily instead of | | | the E/W image when pressing a key on the ECAM control | | | panel. | | | - Possibility to display the S image permanently on either | | | ND instead of the ND image by means of the ECAM/ND XFR | | | selector switch. | |-------------|--------------------------------------------------------------| | LOWER ECAM | Loss of the S image. Possibility to get it back temporarily | | DU | or permanently (same as above). | |-------------|--------------------------------------------------------------| | BOTH ECAM | Loss of Engine/Warning and System images. Possibility to | | DUs | have the Engine/Warning image displayed on either ND by | | | means of the ECAM/ND XFR selector switch. Possibility to | | | display momentarily the S image instead of the E/W image. | |-------------|--------------------------------------------------------------| | | In case of an electronic failure concerning the ECAM CP, the | | | following functions remain available : ALL, CLR, RCL, CANC, | | | since the corresponding keys are directly wired to the DMCs. | | | By means of the ALL key, the pilot can access any A/C System | | | image. | |-------------|--------------------------------------------------------------|
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