AND before OR

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In a S7 this calculating rule is realized by the OR-Bit. Because the exact recreation of this process would have caused to a dictinct reduction of the process speed the And before Or rule is already considered by the compiler in TrySim. If you program in FBD or LAD you will not notice any differences between the behaviour of the TrySim-PLC and a S7. But if you program jumps between different bracket levels in STL it will be possible that divergences occur.

Avoid such jumps which lead to quite unreadable programs by the way.

 

Differing implemented properties

 

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