User Manual

LOGO! functions
4.4 Special functions list - SF
LOGO!
170 Manual, 04/2011, A5E03556174-01
4.4.5 Wiping relay (pulse output)
Short description
An input signal generates a signal with a configurable period at the output.
Symbol in LOGO! Wiring Description
Input Trg A signal at input Trg (Trigger) triggers the time for the
wiping relay function.
Parameter The output is switched off after the time T has expired
(output signal transition 1 to 0).
Retentivity:
/ = No retentivity
R = The status is retentive.
4
7UJ
3DU
Output Q A signal at input Trg sets Q. If the input signal = 1,
output Q remains set for the time Ta.
Parameter T
Note the information on parameter T in topic Time response (Page 151).
The time for parameter T can be provided by the actual value of another already-
programmed function. You can use the actual values of the following functions:
● Analog comparator (Page 218) (actual value Ax – Ay)
● Analog threshold trigger (Page 213) (actual value Ax)
● Analog amplifier (Page 226) (actual value Ax)
● Analog multiplexer (Page 248) (actual value AQ)
● Analog ramp (Page 251) (actual value AQ)
● Mathematic instruction (Page 265) (actual value AQ)
● PI controller (Page 256) (actual value AQ)
● Up/down counter (Page 201) (actual value Cnt)
If your LOGO! is a LOGO!
0
BA7, 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)