--------------
| LAYOUT 1 | ------ Marker
 --------------
| LAYOUT 2 | ------
--------------
| LAYOUT 3 | ------
--------------
| LAYOUT M | ------
--------------
All cabin layouts are programmed according to the airlines requests. You can modified these layouts via the PTP.
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 At the end of the modification procedure the new layout is automatically stored as layout M.
 (2)
 Mandatory Layout For security reasons, there is a mandatory layout laid down in the directors to ensure the operation of the system in all conditions. The mandatory layout is used in following conditions:

 -
if normal power is not available,

 -
if the CAM is inoperativ,

 -
if the PTP is inoperativ.

 (3)
 Operation (Ref. Fig. 032)

 (a) General The Programming and Test Panel (PTP) 110RH transmits data to both CIDS directors via a single ARINC 429 bus. It receives data via two ARINC 429 busses, one from each director. Four discrete connections are provided to the emergency lighting system. A DC ground and 28 V DC line connect to the PTP for BAT indication and for switch-over functions. +28 V DC is fed to the PTP from service busbar 601PP circuit breaker 161RH.
 After CIDS power-up the panel display stays on for approx. 10 minutes, then the DSPL ON membrane switch must be pressed to activate the panel display. The first selection menu then appears and shows the modes available. The various modes are explained under the separate section. 'System Testing and Programming' in this chapter (Ref. paragraph 8).
 The selection of displayed RET function returns to the previous menu when the display labelled key is pushed. When the DSPL ON key is pushed, it always returns the user to the first menu. When numerical data is to be entered, one of the blank keys displays ENTER. The word ENTER is displayed on the blank keys when a data input is required. A sign flashes to show the correct position for the data input. When the data is entered, the sign does not flash. The digits of the data input replace the sign. The sign will flash in the next row which now requires an input. Pushing the CLR membrane switch deletes all the digits so far entered. Pushing the menu-labelled ENTER key enters the complete number and the PTP can then use it. For correct CIDS operation, the CAM must be plugged in. There is no possibility of programming the CIDS while the CAM is missing.
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 Programming and Test Panel-System Connections
 Figure 032

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 (b)
 CAM LAYOUT Marking The four CAM layout memories are nonvolatile, and one of them is always electronically marked as the current layout. When the CIDS is powered-up, the marked layout is automatically down loaded via the PTP ARINC 429 link to the memories of both directors. The sub-menu listing the layouts displays the marked layout in flashing mode. When any change of parameters via the PTP is done, the resulting modified layout is stored in the CAM layout M. The marker is automatically set to layout M. Each time a modified layout is transfered to the Layout M, a CAM internal software count is incremented for documentation purposes.

 (c)
 Emergency Lighting Test Activation There are two emergency lighting tests activated from the PTP:

 -
the battery test,

 -
the system test.
 These tests are described in the 'System Testing and Programming'
 section (Ref. para. 8)

 F. Attendant Indication Panel
 (1) Description
 (Ref. Fig. 033)

 (a)
 General An Attendant Indication Panel (AIP) 320RH is installed at each attendant station. The panel lights are visible from at least ten meters away. They provide an attendant far call function, and its alphanumeric display is readable from about two meters distance. The display provides system-related information. It is divided into two rows of sixteen characters each.

 (b)
 Architecture
 (Ref. Fig. 034)
 The AIP comprises of these modules:

 -
a display panel with two lines, each with sixteen characters,

 -
a display controller which includes a character generator,

 -
a display driver,

 -an single chip microcomputer which includes a serial interface,
 -a RAM and READ Only Memory (ROM) as program memory,
　
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