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Positive or Negative Transitional Contacts in UDFB´s


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  • rockber changed the title to Positive or Negative Transitional Contacts in UDFB´s
  • MVP 2023

Calling a UDFB is done from ladder, and you can call it from a positive transitional.  It will only solve once if you do so and the references to any bits passed to the UDFB will be transitional by inference.

If you need transitional functionality then you use a function (AKA subroutine) that is called continuously from the Main (Function 1).

What exactly are you trying to do?

Joe T.

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