Operator ‘INI’¶

Note

The INI operator is a CoDeSys V2.3 operator. In CODESYS V3, the FB_init method replaces the INI operator. You can still use this operator in projects that are imported from CoDeSys V2.3.

The INI operator is used for initializing retain variables of a function block instance used in a POU.

Assign the operator to a Boolean variable.

Syntax:

<Boolean variable name> := INI <FB instance name> , <Boolean value> );
<Boolean value> : TRUE | FALSE

If the second parameter of the operator yields TRUE, then CODESYS initializes all retain variables that are defined in the function block <FB instance name>.

Examples

fbinst is the instance of the function block fb1, where the retain variable retvar is defined.

ST:

Declaration in the block:

VAR
        fbinst : fb1;
        b : BOOL;
END_VAR


Program part:

b := INI(fbinst, TRUE);
ivar := fbinst.retvar; (* => retvar is initialized *)

FBD