Siemens LOGO! Series Manual page 169

● Retentive on-delay (current time Ta)
● Wiping relay(pulse output) (Page 170) (current time Ta)
● Edge triggered wiping relay (Page 172) (current time Ta)
● Asynchronous pulse generator (Page 175) (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 required 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
Functional description
The 0 to 1 signal transition at input Trg triggers the current time T
T. A further signal at input Trg does not influence the time T
The output and the time T
If retentivity is not set, output Q and the expired time are reset after a power failure.
LOGO!
Manual, 04/2011, A5E03556174-01
are reset with the next 1 signal at input R.
a
LOGO! functions
4.4 Special functions list - SF
Output Q is set when T
a.
.
a
=
a
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