Fail-Safe Blocks
Fail-Safe Systems
8-54 A5E00085588-03
8.5.5 F_START
Function
In the first cycle of the cyclic interrupt cycle after a cold or warm restart, the block
indicates by means of a value of 1 at the output COLDSTRT that a startup (cold or
warm restart) has been carried out. COLDSTRT remains present until the next call
of F_START.
The F_START must be called before the evaluating blocks.
I/Os
Name Data Type Explanation Default
Output:
COLDSTRT F_BOOL Startup identifier (cold restart
or warm restart)
1
Error Handling
None
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