IFM Electronic AC402S Programming Manual page 110

SmartPLC SafeLine AC4S with fieldbus interfaces
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States of the safe application
The safe application on the fail-safe PLC of AC4S can take the following states:

RUN
The safe application is executed (cyclic processing).

STOP
The safe application is not executed.

TERMINATED
The safe application was terminated due to a runtime error.
In the online mode the current state of the safe application is displayed in the CODESYS
status bar.
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