Off-Delay - Siemens Logo! Manual

LOGO! functions
4.4.2

Off-delay

Short description
When an on-delay is set, the output is reset when the con-
figured time has expired.
Symbol in
LOGO!
Parameter T
Please note the parameter T defaults specified in
Chapter 4.3.2.
The time for parameter T can be based on the actual value
of another, already configured function. You can use the
process variables of the following functions:
S
Analog comparator (actual value Ax – Ay,
see Chapter 4.4.18)
S
Analog threshold trigger (actual value Ax,
see Chapter 4.4.16)
140
Wiring
Input Trg
Input R
Parameter
Output Q
Description
You start the off-delay time
with a negative edge (1 to 0
transition) at input Trg (Trig-
ger)
A signal at input R resets
the on-delay time and the
output.
T is the time that expires af-
ter which the output is
switched off (1 to 0 transi-
tion of the output signal).
Retentivity:
/ = No retentivity
R = The status is retentive.
Q is set with a signal at in-
put Trg. It holds this state
until T has expired.
LOGO! Manual
A5E00380835-01