SCP 111-2
S-DIAS SAFETY CPU MODULE
Page 22
08.09.2022
6.1.2
Command Selection Sequence
After the Start sequence, the desired command is selected. This selection is made with button
presses in the following time intervals: The minimum press duration is 200 ms, maximum is
approximately 3 seconds; the minimum pause between individual button presses is 200 ms,
the maximum is 10 seconds. After each correct button press (incl. The minimum pause of
approx. 200 ms), the selected command is shown with LEDs C1, C2 and C3. If an invalid
command is selected (see “Valid Commands"), the Error sequence is initiated; also when the
time intervals are not observed correctly. LED B lights continuously during this sequence.
6.1.3
End Sequence
This sequence is used to confirm the selected command. Here, the button is pressed until
LED starts to blink (approx. 3 seconds, blinks in a slow interval). The number of light pulses
in LED B depends on the previously selected command (see "valid commands").
After the LED turns off, the button must be released. After the minimum pause of
approximately 200 ms, in which the button must not be pressed, the service mode is initiated,
and the command is executed. If the button is pressed for longer than approximately 3
seconds, the selected command is not accepted and the Error sequence is displayed. The
same applies when the button is released too soon or the minimum pause of 200 ms is not
observed. After executing the command, the corresponding mode is initiated depending on
the command (see "Valid Commands").
If executing the command leads to an error (e.g. because SET_VERIFIED should be
executed although no valid configuration data is available in the Safety CPU), the Error
sequence is initiated.
