ButtonToggle (FB)¶

FUNCTION_BLOCK ButtonToggle

Functional Description¶

Switching element with key and central control

Typical applications: Light scanners and light output

Portrayal¶

Interfaces¶

Inputs¶

Name
Datatype

Range

Init-Value

Function

xButton BOOL
Operating key

xCentralOn BOOL
Central switch-on

xCentralOff BOOL
Central switch-off

Outputs¶

Name
Datatype

Range

Init-Value

Function

xLightHB BOOL
Enable - output

Functional Description¶

General¶

The function block is generally used for immediate control of the enable output xQ depending on the rising edges
at the inputs xButtons (= operating key), xCentralOn (= central switch-on), and xCentralOff (= central switch-off). Each rising
edge at the input - control key xButton changes the output xQ to the opposite state, if no central operation takes place.
If no rising edges are detected, the state of the enable output xQ does not change.

Function table¶

xButton xCentralOn xCentralOff xQ
Notes

FALSE, TRUE, H/L FALSE, TRUE, H/L FALSE, TRUE, H/L
unchanged

Inputs inactive

L/H FALSE, TRUE, H/L FALSE, TRUE, H/L FALSE > TRUE, TRUE > FALSE
Status change at the output

FALSE, TRUE, H/L L/H FALSE, TRUE, H/L TRUE
Central switch-on

FALSE, TRUE, H/L FALSE, TRUE, H/L L/H FALSE
Central switch-off

L/H L/H FALSE, TRUE, H/L TRUE
Central switch-on (higher priority)

L/H L/H L/H FALSE
Central switch-off (highest priority)

Legend: L/H ... Rising edge, H/L ... falling edge

Visualization¶

Information¶

Element
Authors

Date
Version
Notes

Function
Adam Bartod 09.2016 1.0
Initial version

Programming
Adam Bartod 09.2016 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	xButton	BOOL	Operating key
	xCentralOn	BOOL	Central switch-on
	xCentralOff	BOOL	Central switch-off
Output	xOut	BOOL	Enable - output