Compiler Warning C0514

Message: Should not access internal property <POU name>.<property name> of library <library name>

Possible error cause: A library contains a POU with a property, whose visibility is restricted to this library with the INTERNAL keyword. The property is accessed from outside of this library.

Error correction: Change the visibility of the property (for example, remove the INTERNAL keyword) or change the declaration of the variable.

PROGRAM PLC_PRG
VAR
      p1: MyLib.POU;
      somevar1 :INT := p1.Prop;
END_VAR