Siemens LOGO! 230 RC - Retentive On-Delay

33
LOGO! manual
EWA 4NEB 712 6006-02
3.5.10 Retentive on-delay
Trg
R
T
Q
Retentive on-delay in LOGO!Retentive on-delay in a cir-
cuit diagram:
RK1
K1
K1
Trg Q
Trg input You start the time for the on-delay via the Trg (trigger) input
R input You reset the time for the on-delay and set the output to 0
via the R (reset) input(R has priority over Trg)
T parameter T is the time after which the output is switched on (the output
changes from 0 to 1).
Timing diagram
Trg
T
T
a
starts
Q
R
T
The bold part of the
timing diagram ap-
pears in the retentive
on-relay symbol.
If the state of the Trg input changes from 0 to 1, the current time T
a
starts.
When T
a
reaches the time T, the output (Q) is set to 1. Another switching
operation at the Trg input has no effect on T
a
.
The output and the time T
a
are not reset to 0 until the state of the R input
changes to 1 again.
Programming LOGO!