Operator 'INI'

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