Lenze PLC Designer PLC Designer (R2-x) Manual de usuario descargar pdf (Pagina 505)

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IEC Operators and additional norm extending functions

 DMS 3.2 EN 02/2011 TD29 503

9.11 Initialization Operator

9.11.1 INI Operator

The INI operator can be used to initialize retain variables which are provided by a

function block instance used in the POU.

The operator must be assigned to a boolean variable.

Syntax: <bool-Variable> := INI(<FB-instance, TRUE|FALSE)

If the second parameter of the operator is set to TRUE, all retain variables defined in

the function block FB will be initialized.

Example in ST:

fbinst is the instance of function block fb, in which a retain variable retvar is defined.

Declaration in POU:

Implementation part:

b := INI(fbinst, TRUE);

ivar:=fbinst.retvar (* => retvar gets initialized *)

Example of operator call in IL:

Example of operator call in FUP:

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Lenze PLC Designer PLC Designer (R2-x) Manual de usuario Pagina 505