Siemens LOGO! Series Manual page 211

If your LOGO! is a LOGO! 0BA7, you can additionally use the actual values of the following
functions:
● Analog filter (0BA7 only) (Page 271) (actual value AQ)
● Average value (0BA7 only) (Page 276) (actual value AQ)
● Max/Min (0BA7 only) (Page 273) (actual value AQ)
● On-delay (Page 160) (current time Ta)
● 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 (actual value Fre)
Select the required function by the block number.
Timing diagram
Functional description
The threshold trigger measures the signals at input Fre. The pulses are recorded across a
configurable time G_T.
Output Q is set and reset in accordance with the set thresholds. See the calculation rule
below.
LOGO!
Manual, 04/2011, A5E03556174-01
LOGO! functions
4.4 Special functions list - SF
211