FB_Init

Short Summary

The constructor FB_init is needed to create an unique hash code. The hash code is a pseudo random number create with a xorshift_ algorithm. It can be overwritten on derivations, because it will be called implicit, SUPER^.FB_init() is not required. For more information check: Behavoir with derived function blocks_

.. _Behavoir with derived function blocks: https://infosys.beckhoff.com/content/1033/tc3_plc_intro/5482088715.html?id=6983869892358031022 .. _xorshift: https://en.wikipedia.org/wiki/Xorshift

parameters

• Return type: BOOL

Parameters

Name	Type	Comment	Kind
bInitRetains	BOOL	if TRUE, the retain variables are initialized (warm start / cold start)	input
bInCopyCode	BOOL	if TRUE, the instance afterwards gets moved into the copy code (online change)	input
handler	CNM_OpModeHandlingInterfaces.IOpModeHandler	the handler where this message service belongs to	input

Code

Declaration

METHOD FB_Init : BOOL
VAR_INPUT
	(* if TRUE, the retain variables are initialized (warm start / cold start)*)
	bInitRetains	: BOOL;
	(* if TRUE, the instance afterwards gets moved into the copy code (online change) *)
	bInCopyCode	: BOOL;
	(* the handler where this message service belongs to *)
	handler :CNM_OpModeHandlingInterfaces.IOpModeHandler;
END_VAR

Implementation

THIS^.myHandler := handler;