Lenze PLC Designer PLC Designer (R2-x) Instrukcja Użytkownika Pobierz pdf (Strona 42)

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L-force | PLC Designer

What is What in PLC Designer

40 DMS 3.2 EN 02/2011 TD29 

InOutVariables at call:

Please regard, that the InOutVariables (VAR_IN_OUT) of a function block are handed

over as pointers. For this reason in a call of a function block no constants can be

assigned to VAR_IN_OUTs and there is no read or write access from outside to them.

Example

Calling a VAR_IN_OUT variable inout1 of function block fubo in a ST module:

VAR

fuboinst:fubo;

iVar1:int;

END_VAR

iVar1:=2;

fuboinst(iInOut1:=iVar1);

not allowed in this case: “fuboinst(iInOut1:=2);” or “fuboinst.iInOut1:=2;”

Examples for calling function block FUB:

Function block FUB: see above, chapter 'Function Block':

Declaration part:

FUNCTION_BLOCK FUB

VAR_INPUT

iPAR1:INT;

iPAR2:INT;

END_VAR

VAR_OUTPUT

iMELERG:INT;

xVERGL:BOOL;

END_VAR

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