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Parameterization of the safety module
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5.5 Behavior of the outputs in the event of enabled
switch-off delay for stop category 1
Depending on the event that causes the outputs to be switched off, the parameterization of
the switch-off delay, and also on the parameterization of the shutdown time in the case of
INTERBUS-Safety, the time until the outputs are actually switched off can vary.
For the switch-off operation, please take into consideration the following:
– The switch-off operation can be interrupted by switching the output on again.
– If the parameterization of the module is modified, the modified parameterization does
not take effect until all the outputs have been switched off.
If the parameterization is modified before the switch-off operation is complete, diagnos-
tic message 02F2
hex
is generated.
– Carry out a validation every time the parameterization is modified.
– Please note that when the parameterization is modified, this can result in delayed start-
up due to the switch-off delay time.
Table 5-2 Switching off the outputs according to the trigger event and the parameterization
Switching off outputs Influence of parameterized Switching off outputs
Switch-off
delay
Shutdown
time
– By the safe controller Yes No Once the parameterized switch-off delay
has elapsed
– After a bus error Yes Yes After the sum of the parameterized
shutdown time + the parameterized
switch-off delay has elapsed
– After a short circuit, cross-circuit, fail-
ure of the supply voltage, or hardware
fault
No No Immediately (only stop category 0)
WARNING: Delayed shutdown when using stop category 1
For stop category 1 please take into consideration the following:
– If the parameterized shutdown time is exceeded, the affected outputs are only set to
the safe state once the switch-off delay has elapsed.
– In the event of an error (excluding bus errors) the affected outputs are switched off
immediately (without delay). In this case, only stop category 0 is supported.
WARNING: Incorrect design of safety distances due to incorrect calculation of the
overall shutdown time
When designing the safety distances, please take into consideration the following:
The overall shutdown time of the outputs is calculated as the sum of the parameterized
shutdown time and the parameterized switch-off delay time.