Retentive On-Delay - Siemens LOGO! Series Manual

LOGO! functions
4.4 Special functions list - SF
4.4.4

Retentive on-delay

Short description
A one-shot at the input triggers a configurable on-delay time. The output is set when this
time has expired.
Symbol in LOGO!
Parameter T
Note the defaults specified 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! 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)
168
Wiring Description
Input Trg A signal at input Trg (Trigger) triggers the on-delay
timer.
Input R A signal at input R resets the on-delay time and the
output.
Parameter T represents the on-delay time for the output (output
status transition 0 to 1).
Retentivity:
/ = no retentivity
R = The status is retentive.
Output Q Q is set after the time T has expired.
Manual, 04/2011, A5E03556174-01
LOGO!