FB_init and var init

2020-02-27T13:52:20.534000Z

Look at pragmas help. There are one called call_after_init or something similar. It doesn t work if it is called from a library.

There exist another method which is instantiate an fb from var. If you instantiate it as the first var in your fb, the fb_init of the new fb will be called before your variables initialization.

Be healty!

FB_init and var init

2020-02-27T13:52:20.366000Z

OK, thanks. I saw something that said FB_Init happened before VAR init.

What is the function/method decorator to have it called after init? I think that will work for me.

Thanks.

FB_init and var init

2020-02-27T13:52:20.196000Z

Fb_init is called after the variables initialization.

See in online help how is the initialization sequence

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FB_init and var init

2020-02-27T13:52:20.019000Z

I'm having trouble with initializing function blocks inside of function blocks:

FUNCTION BLOCK FB_Child
VAR
cVar: DINT
END
METHOD FB_Init
VAR_INPUT
bInitRetains: BOOL;
bInCopyCode: BOOL;
SomeVar: DINT;
END_VAR

THIS^.cVar := SomeVar;

FUNCTION BLOCK FB_Parent
VAR
pVar: DINT;
Child: FB_Child(myVar);
END_VAR

METHOD FB_Init
VAR_INPUT
bInitRetains: BOOL;
bInCopyCode: BOOL;
SomeVar: DINT;
END_VAR

THIS^.myVar := SomeVar;

PROGRAM TestProg
VAR
Test: DINT;
Parent: FB_Parent(1234);
END_VAR

Obviously, this program does nothing but initialize a single variable, or should. The problem I'm having is that the Child.cVar (fairy syntax) doesn't have the value 1234, per my example.

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