hyster

 Function Block - Hysteresis detection.

• The hysteresis is detected on the difference of XIN1 and XIN2 signals.

Inputs

Input	Data Type See Data Types.	Range	Unit	Default	Description
XIN1	REAL				First input.
XIN2	REAL				Second input.
EPS	REAL				Hysteresis.

Outputs

Output	Data Type See Data Types.	Range	Unit	Description
Q	BOOL			Detected hysteresis: TRUE if XIN1: Becomes greater than XIN2+EPS and Is not yet below XIN2-EPS.

FBD Language Example

FFLD Language Example

• In the FFLD Language, the input rung (EN) is used for enabling the block.
  • The output rung is the Q output.
  • The block is not called if EN is FALSE.

IL Language Example

Not available.

ST Language Example

(* MyHyst is a declared instance of HYSTER function block. *)
MyHyst (XIN1, XIN2, EPS);
Q := MyHyst.Q;

See Also

• average / averageL
• derivate
• integral
• lim_alrm
• stackint