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 operating duration
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 monitoring period always covers 168 hours (= 1 week). The operating message xFb is active if it is continuously active at least once during the monitoring period for the minimum operating duration tMinFbTime The anti-blocking process is thus prevented and the monitoring period restarts. If no operating message is available, the request/enable can alternatively be connected. If no activity was recorded during the monitoring period, the anti-blocking process (enable - output xOut = TRUE ) is triggered with the duration tTime on the weekday eDay at the time todStartTime triggered. At the same time the monitoring period restarts. The initial triggering of the anti-blocking process may be delayed depending on the relevant settings ( weekday eDay and todStartTime ) may be delayed.

Example

Test time ended on Tuesday morning, triggering of the blockage protection process only next Monday.

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

Prerequisite for using 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 / parameter eDay

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

Setpoint / parameter tTime

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

CODESYS

InOut:

Scope	Name	Type	Initial
Input	xAlarmControlSupply	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