hi all
I have a FB with IN/OUT variable.
Inside the FB, I want to get the address of the IN/OUT variable.
If I use __SYSTEM.VAR_INFO, I get the address of the FB copy rather than 'external' variable.

VAR_IN_OUT
    MyVar: bool;
END_VAR
VAR
    Info: __SYSTEM.VAR_INFO;
END_VAR

Info := __VARINFO(MyVar);

This give me the address of MyVar but I actually want the address of the variable passed to MyVar

Any clues please??

thanks, ph

Not knowing exactly what you want to accomplish, you can try to use

VAR_INPUT
    MyVar: POINTER TO BOOL;
END_VAR

MyVar contains the address of your referenced variable, and MyVar^ dereferences it allowing you to access the value. If this doesn't meet your needs, could you add more detail on what you are trying to accomplish?

to get the address just use ADR( )

variables defined in a VAR_IN_OUT block are references pointing to the passed variables.

VAR_IN_OUT
    MyVar: bool;
END_VAR
VAR
    adrMyVar: __XWORD;
END_VAR

adrMyVar := ADR(MyVar);

thanks...I changed to I POINTER which is perfect.