Trig (FB)

FUNCTION_BLOCK Trig

Short Description

Edge detection on a binary input signal

Impulse generation with rising / falling or both edges

Portrayal

Interfaces

Inputs

Name	Datatype	Range	Init-Value	Function
xIn	BOOL			Binary input signal

Outputs

Name	Datatype	Range	Init-Value	Function
xTrigH	BOOL			Imulse output for rising edges
xTrigL	BOOL			Imulse output for falling edges
xTrig	BOOL			Impulse output for rising / falling edges

Functional Description

General

The binary input signal xIn is permanently monitored to detect rising and falling edges.

For each rising edge, a impulse with a duration of one program cycle is generated at the xTrigH output.

For each falling edge, a impulse with a duration of one program cycle is generated at the xTrigL output.

For each rising / falling edge, a impulse with a duration of one program cycle is generated at the xTrig output.

Visualization

Information

Element	Authors	Date	Version	Notes
Function	Adam Bartod	01.2017	1.0	Initial version
Programming	Adam Bartod	01.2017	1.0	Initial version
Test	Jochen Reu	09.2017	1.0	Initial version
Documentation	Jochen Reu	10.2017	1.0	Initial version

Codesys

InOut:

Scope	Name	Type	Comment
Input	xIn	BOOL	Binary input signal
Output	xTrigH	BOOL	Imulse output for rising edges
	xTrigL	BOOL	Imulse output for falling edges
	xTrig	BOOL	Impulse output for rising and falling edges