Hi all,
I'm a bit confused. In the siemens manual "SIMATIC S7 Distributed Safety - Configuring and Programming" there is a section regarding using always on/off bits in a failsafe FB.
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I'm a bit confused. In the siemens manual "SIMATIC S7 Distributed Safety - Configuring and Programming" there is a section regarding using always on/off bits in a failsafe FB.
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Boolean Constants "0" and "1"
If you require Boolean constants "0" and "1" in your safety program to assign parameters during block calls, you can access the "RLO0" and "RLO1" variables in the F-shared DB using fully qualified DB access ("F_GLOBDB".RLO0 or "F_GLOBDB".RLO1).
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I have configured my automatic DBs and the DB F_GLOBDB exists, although I cannot open it to verify these bits exist (block is protected). I am trying to access this DB from a safe block. However, I still cannot access it and can't find any information on the internet anywhere regarding this problem. Does anyone have any advice? Cheers!