Causes Of Errors - Siemens SIMATIC PCS 7 Operating Manual

Configuring the safety program
7.4 F-STOP
All F shutdown groups associated with a safety program are shut down the first time an
error is detected in an F shutdown group.
If you change the shutdown behavior, you must recompile the F program. This applies even
if you have changed the shutdown behavior online in CFC.
7.4.4

Causes of errors

Errors that trigger an F-STOP
● Distortion of:
– Data
– Program sequence
– Code
● CPU error
Errors that always trigger an F-STOP with full shutdown
Irrespective of the parameter assignment for F-STOP, a full shutdown is always triggered in
the event of a cyclic interrupt OB request error (caused by a CPU/OB overload, for example).
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Compendium Part B - Process Safety (V8.2)
Operating Manual, 07/2016, A5E35031794-AB