Siemens 6ED1050-1AA00-0BE8 manual 178

LOGO! functions

4.4Special functions list - SF

●Off-delay(Page 164) (current time Ta)

●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)

●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

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Functional description

The 0 to 1 transition at input En triggers a random on-delay time between 0 s and TH. The output is set when the on-delay time has expired and if the signal at input En remains hi at least for the duration of this time.

The time is reset if input En is reset before the on-delay time has expired.

A 1 to 0 transition at input EN triggers a random off-delay time between 0 s and TL.

The output is reset after the off-delay time has expired, provided input En remains lo at least for the duration of this time.

The time is reset if the signal at input En changes to 1 again before the off-delay time has expired.

The time expired is reset after a power failure.

	LOGO!
178	Manual, 04/2011, A5E03556174-01