Siemens Logo! Manual page 218

LOGO! functions
Timing diagram
En
Switch
Q
Functional description
In parameter assignment mode, the output is set with a sig-
nal at input En, if the ''Switch' parameter is set to 'On' and
confirmed with OK. Whether the function was configured
for pushbutton or switching action is here of no concern.
The output is reset to '0' in the following three cases:
S
After a 0 to 1 transition at input En.
S
When the function was configured for momentary push-
button action, and one cycle has expired since it was
switched on.
S
When the position 'Off' was selected at the 'Switch' pa-
rameter and confirmed with OK in parameter assign-
ment mode.
If retentivity is not set, output Q is initialized after a power
failure according to your configuration at the "Start" param-
eter.
Preset of the Par parameter
View in programming mode (example):
1. Select the 'Softkey' function.
2. Select input En and confirm with OK. The cursor is now
positioned below 'Par'.
3. Change to the input mode of 'Par':
(the cursor is now positioned to 'On')
B33
On=
Start=On
210
+/
The status is not retentive
The function is set for 'momentary
pushbutton' action
Q is set in the first cycle after the
program start
Confirm with OK
LOGO! Manual
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