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Siemens LOGO Soft Comfort Online Help Manual

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Reference material
5.3 Special functions
LOGO!Soft Comfort Online Help
358 Operating Instructions, 11/2017
5.3.6.7
Softkey
Short description
This SFB provides the action of a mechanical pushbutton or switch.
Connection
Description
Input
En
Output Q is set with a 0 to 1 signal transition at input En (Enable) and if in addi-
tion, 'Status=On' has been confirmed in configuration mode.
Parameter
Switch:
Sets either a momentary pushbutton action for one cycle (On) or a
switching action of the function (Off).
Status: On or Off state that is applied in the initial cycle after program startup.
Output
Q
Output Q remains set 1, as long as En=1 and the status at the parameter Type =
Switch and Status = On.
Output Q is set for the duration of one cycle if EN=1. Switch = On (momentary
pushbutton) and Status = On.
Factory state
The default of the Switch parameter is switching action.
Timing diagram
Description of the function
The output is set when input En is set and the 'Status' parameter is set to 'On' and confirmed
with OK. This action is performed irrespective of a configured switch or pushbutton function.
The output is reset to '0' in the following three cases:
● With a 1 to 0 signal transition at input En
● When a pushbutton function is configured and one cycle has expired after its actuation
● When the 'Status' parameter sets the 'Off' status in configuration mode, and this has been
confirmed with OK
… 358 …


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