Retentive On-Delay - Siemens Logo! Manual

LOGO! functions
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 Chapter 4.3.2.
The time for parameter T can be based on the process
variable of another, already programmed 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)
S
Analog amplifier (actual value Ax, see Chapter 4.4.20)
S
Analog multiplexer (actual value AQ, see Chapter
4.4.26)
S
Analog ramp (actual value AQ, see Chapter 4.4.27)
S
PI controller (actual value AQ, see Chapter 4.4.28)
and
144
Wiring
Input Trg
Input R
Parameter
Output Q
Description
A signal at input Trg (Trig-
ger) triggers the on-delay
time.
A signal at input R resets
the on-delay time and the
output.
T represents the on-delay
time for the output (output
status transition 0 to 1).
Retentivity:
/ = no retentivity
R = The status is retentive.
Q is set after the time T has
expired.
LOGO! Manual
A5E00380835-01