FB_BA_FdbBinary

The template is used to monitor binary feedback signals such as the end positions of dampers or valves. However, it can also be used for differential pressure monitoring by means of a differential pressure monitor.

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

Block diagram

Syntax

FUNCTION_BLOCK FB_BA_FdbBinary EXTENDS FB_BA_View
VAR_INPUT
  bEn                   : BOOL;
  bCommand              : BOOL;
  bFeedback             : BOOL;
END_VAR
VAR_OUTPUT
  bDst                  : BOOL;
END_VAR
VAR_INPUT CONSTANT
  DelayFeedback         : FB_BA_AV_Op;
  Dst                   : FB_BA_BV;
END_VAR
VAR_INPUT CONSTANT PERSISTENT
  {attribute 'parameterUnit':= 's'}
  nInterruptionDelay    : UDINT := 1;
END_VAR
VAR
  FdbCtrl               : FB_BA_FdbCtrlBinary;
END_VAR

Inputs

Name	Type	Description
bEn	BOOL	General enable of the template.
bCommand	BOOL	The switching actuator output of the aggregate to be monitored is connected to the input.
bFeedback	BOOL	The feedback signal of the aggregate to be monitored is connected to the input, e.g. a differential pressure monitor, flow monitor or limit switch.

Outputs

Name	Type	Description
bDst	BOOL	Binary object for displaying the fault.

Inputs CONSTANT

Name	Type	Description
DelayFeedback	FB_BA_AV_Op	Analog value object for entering the time delay of the feedback. The travel time of the actuator can be used. In the case of differential pressure monitoring, a time delay must be specified here until the system has to built up the required differential pressure.
Dst	FB_BA_BV	Binary object for displaying the fault.

Name

Type

Description

DelayFeedback

FB_BA_AV_Op

Analog value object for entering the time delay of the feedback.

The travel time of the actuator can be used.

In the case of differential pressure monitoring, a time delay must be specified here until the system has to built up the required differential pressure.

Dst

FB_BA_BV

Binary object for displaying the fault.

Inputs CONSTANT PERSISTENT

Name	Type	Description
nInterruptionDelay	IUDINT	Analog value object for entering the switch-on value for FixedLimit. In the case of differential pressure monitoring, a pressure value must be selected here which must not be undershot during the running process.

Name

Type

Description

nInterruptionDelay

IUDINT

Analog value object for entering the switch-on value for FixedLimit.

In the case of differential pressure monitoring, a pressure value must be selected here which must not be undershot during the running process.

Variables

Name	Type	Description
FdbCtrl	FB_BA_FdbCtrlBinary	Monitoring the binary feedback of the actuators.

Requirements

Development environment	Necessary function
TwinCAT from v3.1.4024.35	TF8040 \| TwinCAT Building Automation from V5.0.0.0