How to pass an array of struct as an argument of a function block in codesys

Question

How can you pass an array of structure as an argument to a function block?

Initializing the array dirrectly as an argument didn't work:

    myFunctionBlock(inArrayOfStruct := [(Param1 := TRUE), (Param1 := FALSE)])

Guiorgy · Accepted Answer · 2022-08-26 13:19:53Z

1

I think the error message if you try this:

fb: FB(inArrayOfStruct := [(Param1 := TRUE), (Param1 := FALSE)]);

says it all:

[ERROR]  C0304:  An array initialisation is not possible as parameter of an initial function call. Use a variable instead

Just use a variable:

arr: ARRAY [0..1] OF DUT := [(Param1 := TRUE), (Param1 := FALSE)];
fb: FB(inArrayOfStruct := arr);

or

arr[0].Param1 := TRUE;
arr[1].Param1 := FALSE;
fb(inArrayOfStruct := arr);

answered Aug 25, 2022 at 20:12

Guiorgy

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