FireDamperTest

FireDamperTest (FB)

FUNCTION_BLOCK FireDamperTest

Short description

Anti-blocking protection for a binary signal

Representation

Interfaces

Inputs

Name	Data type	Value range	Initial value	Function
xFb	BOOL			Operating message

Outputs

Name	Data type	Value range	Initial value	Function
xOut	BOOL			Enable - Output
xAbsOn	BOOL			Indicator - anti-blocking process
dtAbsLastOn	DATE_AND_TIME			Start date/time of the last anti-blocking process

Setpoints / parameters

Name	Data type	Value range	Initial value	Function
tMinFbTime	TIME		T#30s	Minimum run time
tTime	TIME		120s	Duration of the anti-blocking process
eDay	eDoW		eDow.Monday	Weekday of the anti-blocking process
todStartTime	TOD		08:00:00	Start time of the anti-blocking process

Function description

General

This function block is used to monitor the operating message xFb for activity. The test period is 168 hours each time (= 1 week). The operating message xFb is considered active if it is continuously active once during the minimum operating duration within the test period. tMinFbTime This prevents the blocking protection process, and the test period starts again. If there is no operating message, the request / enable can alternatively be connected. If no activity is recorded during the test period, the blocking protection process (enable - output xOut = TRUE) is triggered after the time duration tTime on the weekday eDay at the time todStartTime . At the same time, the test period restarts. The initial triggering of the blocking protection process can, depending on the relevant settings (weekday eDay and todStartTime).

Example

Inspection period ended on Tuesday morning, triggering of the anti-blocking process only on the following Monday.

At the output dtAbsLastOn the start date and start time of the last anti-blocking process are available.

Prerequisite for the use of the function block AbsB

The use of the TimeRead2 function block is required for correct operation.

Enable - Output xOut

xFb	Anti-blocking process	xOut	Notes
X	FALSE	FALSE	Anti-blocking process not active
X	TRUE	TRUE	Anti-blocking process active

Legend: X = any

Indicator - anti-blocking process xAbsOn

xFb	Anti-blocking process	xAbsOn	Notes
X	FALSE	FALSE	Anti-blocking process not active
X	TRUE	TRUE	Anti-blocking process active

Legend: X = any

Setpoint / parameters eDay

The anti-blocking function can be globally disabled by setting eDay = eDow.Inactive.

Setpoint / parameters tTime

The anti-blocking function can be globally disabled by setting tTime = 0s can be globally disabled.

CODESYS

InOut:

Scope	Name	Type	Initial
Input	xAlarmControlVoltage	BOOL	FALSE
Input	xTestOK	BOOL	FALSE
Output	xTestEx	BOOL	FALSE
Output	dtTestLastStart	DT
Output	dtTestLastOK	DT
Input Const	udiMaxTime	UDINT	5
Input Const	xVisuStart	BOOL	FALSE
Input Const	xVisuStop	BOOL	FALSE