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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

  • Return type: BOOL

Parameters​

NameTypeCommentKind
bInitRetainsBOOLif TRUE, the retain variables are initialized (warm start / cold start)input
bInCopyCodeBOOLif TRUE, the instance afterwards gets moved into the copy code (online change)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;  
END_VAR
VAR
	{attribute 'hide'}
	newHashstate3		:CNM_AbstractObject.Hashcode;
END_VAR
VAR CONSTANT
	{attribute 'hide'}
	NUMBER_OF_LEFT_SHIFTS		:UINT	:= 17;
	{attribute 'hide'}
	NUMBER_OF_LEFT_ROTATIONS	:UINT   := 45;
END_VAR

Implementation​

THIS^.assertions.setCallBack(THIS^);