Siemens LOGO! Series Manual page 176

LOGO! functions
4.4 Special functions list - SF
● 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)
● Aysnchronous 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 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
You can configure the pulse/interpulse width at the T
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.
176
(Time High) and T (Time Low)
H L
Manual, 04/2011, A5E03556174-01
LOGO!