FB_BA_Hys_02

The template represents a sliding limit value monitoring with two switching points.

	The initialization of the template takes place within the method FB_Init.

Block diagram

Syntax

FUNCTION_BLOCK FB_BA_Hys_01 EXTENDS FB_BA_View
VAR_INPUT
  bEn      : BOOL;
  fIn      : REAL;
  fOn      : REAL;
  fOff     : REAL;
END_VAR
VAR_OUTPUT
  bQ       : BOOL;
  bDst     : BOOL;
END_VAR
VAR_INPUT CONSTANT
  On       : FB_BA_AV_Op;
  Off      : FB_BA_AV_Op;
  Q        : FB_BA_BV;
END_VAR
VAR
  Swi2P    : FB_BA_Swi2P;
END_VAR

Inputs

Name	Type	Description
bEn	BOOL	General enable of the function block.
fIn	REAL	Actual value
fOn	REAL	Dynamic switch-on point
fOff	REAL	Dynamic switch-off point

Outputs

Name	Type	Description
bQ	BOOL	Output of the current state of the hysteresis function.
bDst	BOOL	Display of a fault or the BV object is active. bDst is only active if the property bEventDetectionEnable of the BV object was set to TRUE. The monitoring of the binary feedback indicates a fault.

Name

Type

Description

BOOL

Output of the current state of the hysteresis function.

bDst

BOOL

Display of a fault or the BV object is active.

bDst is only active if the property bEventDetectionEnable of the BV object was set to TRUE.

The monitoring of the binary feedback indicates a fault.

Inputs CONSTANT

Name	Type	Description
On	FB_BA_AV_Op	AV object for input of the upper limit of the hysteresis function.
Off	FB_BA_AV_Op	AV object for input of the lower limit of the hysteresis function.
Q	FB_BA_BV	The binary object indicates the current state of the hysteresis function.

Variables

Name	Type	Description
Swi2P	FB_BA_Swi2P	The function block Swi2P is the core of the hysteresis function.

Requirements

Development environment	Necessary function
TwinCAT from v3.1.4024.35	TF8040 \| TwinCAT Building Automation from V5.2.1.0