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5
5-4 User manual IC220SDL953 - September 2011 GFK-2731
5.3 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, and on the parameterization
of the switch-off delay, 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,
diagnostic 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
startup due to the switch-off delay time.
Table 5-2 Switching off of the outputs according to the trigger event and the parameterization
Switching off of outputs Influence of parameterized
switch-off delay
Switching off of outputs
– By the controller Yes Once the parameterized switch-off delay
has elapsed
– After a bus error Yes Once the parameterized switch-off delay
has elapsed
– After a short circuit, cross circuit, failure of
the supply voltage, or hardware fault
No Immediately (only stop category 0)
– After time monitoring has been exceeded
(watchdog time; F
WD_Time
) (e.g., in the
event of faulty bus connection)
Yes Once the parameterized switch-off delay
has elapsed
WARNING: Delayed shutdown when using stop category 1
For stop category 1 please take into consideration the following:
– The guaranteed shutdown time t
G
is extended by the parameterized switch-off delay.
– 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.