Service
Manual
23
23. Programme unit
8
438 9145-41/03
03.11
X4 X5 X6 X7 X8 X9 X10 X11 X12 X13 X14
X15
X1
X2
X3
X16
2 3 4 5 6 7 8 9 10 11 12 13 14
Red LED:
Steady red light = voltage
supply OK.
Green LED:
Quick blinks = communication between the I/O
card and CPU card is OK.
Pushbutton SW1: Used as an acknowledgement button for programming of the
order of the I/O cards (see the section “Replacing the I/O card”).
1
I/O cards
The I/O cards are controlled by the CPU card and communicate via a
serial interface. Depending on the need for inputs and outputs, one
programme unit may have one or two I/O cards.
All inputs and outputs are switched from the I/O card to the various
functions via the communication cards in the rear electric module.
Each I/O card is connected to a separate communication card: I/O
card A11 uses communication card A21 and I/O card A12 uses
communication card A22.
There are inputs for door lock and external switches (e.g. Start/Stop
and Pause). Signals on these inputs are passed on to the CPU card.
The outputs control water valves, detergent supply, drain and heating.
The voltage supply to the CPU and I/O cards takes place via I/O card
1 A11, which feeds voltage to both the CPU card A1 and a possible I/
O card 2 A12.
Note that if the programme unit uses two cards and one needs to be
replaced, special programming is required. It is necessary to
programme the new card with the correct I/O card number (1 or 2)
using a laptop and special software. See the section “Replacing the I/
O card”.
3973
Fig.
5
5
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