AbsB (FB)

FUNCTION_BLOCK AbsB

Short Descritpion

Anti-blocking protection for an binary signal

Portrayal

Interfaces

Inputs

Name	Datatype	Range	Init-Value	Function
xFb	BOOL			Operating message

Outputs

Name	Datatype	Range	Init-Value	Function
xOut	BOOL			Enable - output
xAbsOn	BOOL			Display - blocking protection process
dtAbsLastOn	DATE_AND_TIME			Startdate / -Timepoint of the last blocking protection process

Setpoints / Parameters

Name	Datatype	Range	Init-Value	Function
tMinFbTime	TIME		T#30s	Minimum operating time
tTime	TIME		120s	Time duration of the blocking protection process
eDay	eDoW		eDoW.Monday	Weekday of blocking protection process
todStartTime	TOD		08:00:00 Uhr	Time point of the blocking protection process

Functional Description

General

This function block is used to monitor the operating message xFb to activity. The test period covers 168 hours (= 1 week).

The operating message xFb is active if it is active once in the test period during the minimum operating time tMinFbTime.

The blocking protection process is thus stopped and the test time restarts.

If there is no operating message, the request/enablement can be connected alternatively.

If no activity has been recorded during the test period, the blocking protection process (“Enable - Output xOut = TRUE”)

is activated with the duration tTime on the day of the week eDay at the time todStartTime. At the same time, the test duration starts again.

The initial triggering of the blocking protection process can be delayed

depending on the relevant settings (weekday eDay and todStartTime).

Example

Testing period completed on Tuesday morning, start of the blocking protection process not until next Monday.

At the dtAbsLastOn output, the start date and the start time of the last blocking protection process are available.

Prerequisite for the use of the AbsB functional component

For correct function, the use of the function block TimeRead with xEn = TRUE is mandatory.

Enable - Output xOut

xFb	Blocking protection process	xOut	Notes
X	FALSE	FALSE	Blocking protection process inactive
X	TRUE	TRUE	Blocking protection process active

Legend: X = any

Display of the blocking protection process xAbsOn

xFb	Blocking protection process	xAbsOn	Notes
X	FALSE	FALSE	Blocking protection process inactive
X	TRUE	TRUE	Blocking protection process active

Legend: X = any

Setpoint / Parameter eDay

The blocking protection function can be disabled by set the setting to eDay = eDoW.Inactive.

Sollwert / Parameter tTime

The blocking protection function can be disabled by set the setting to tTime = 0s.

Visualization

Information

Element	Authors	Date	Version	Notes
Function	Adam Bartod	04.2016	1.0	Initial version
Programming	Adam Bartod	04.2016	1.0	Initial version
Test	Jochen Reu	02.2017	1.0	Initial version
Documentation	Jochen Reu	11.2017	1.0	Initial version

Codesys

InOut:

Scope	Name	Type	Initial	Comment
Input	xFb	BOOL		Operating message
	tMinFbTime	TIME	TIME#30s0ms	Minimum operating time
	tTime	TIME	TIME#2m0s0ms	Time duration of the blocking protection process
	eDay	eDoW	eDow.Monday	Weekday of blocking protection process
	todStartTime	TOD	TIME_OF_DAY#8:0	Time point of the blocking protection process
Output	xOut	BOOL		Enable - output
	xAbsOn	BOOL		Display - blocking protection process
	dtAbsLastOn	DT		Startdate / -Timepoint of the last blocking protection process

• AbsB.mEx (METH)
  • Kurzbeschreibung Methode (AbsA.mEx)