User Manual

LOGO! functions
4.4 Special functions list - SF
LOGO!
176 Manual, 04/2011, A5E03556174-01
● On-/off-delay (Page 166) (current time Ta)
● Retentive on-delay (Page 168) (current time Ta)
● Wiping relay(pulse output) (Page 170) (current time Ta)
● Edge triggered wiping relay (Page 172) (current time Ta)
● Ay
s
nchronous pulse generator (current time Ta)
●
Stairway light switch (Page 179) (current time Ta)
● Multiple function switch (Page 182) (current time Ta)
● Stopwatch (Page 198) (actual value AQ)
● Threshold trigger (Page 210) (actual value Fre)
Select the re
quire
d function by the block number. The timebase is configurable. For
information on valid ranges and parameter defaults, refer to the On-delay (Page 160) topic.
Timing diagram
7+ 7/7+7/ 7+7/
4
7+
,QY
(Q
Functional description
You can configure the pulse/interpulse width at the T
H
(Time High) and T
L
(Time Low)
parameters.
Input Inv can be used to invert the output signal, provided the block is enabled with a signal
at input EN.
If retentivity is not set, output Q and the expired time are reset after a power failure.