Siemens LOGO! - Edge Triggered Wiping Relay

LOGO! Manual
A5E00380835-01
148
4.4.6 Edge triggered wiping relay
Short description
An input pulse generates a preset number of output pulses
with a defined pulse/pause ratio (retriggerable), after a con-
figured delay time has expired.
Symbol in
LOGO!
Wiring Description
Input Trg A signal at input Trg (Trig-
ger) triggers the times for
the edge triggered wiping
relay.
Input R A signal at input R resets
the current time (T
a
) and the
output.
Parameter The interpulse width T
L
and
the pulse width T
H
are confi-
gurable.
N determines the number of
pulse/pause cycles TL/TH:
Range of values: 1...9
Retentivity:
/ = No retentivity
R = The status is retentive.
Output Q Q is set after TL has ex-
pired, and reset after TH
has expired.
Parameter T
Please note the information on parameter T in
Chapter 4.3.2.
Timing diagram A
Trg
T
a
is running
Q
The bold section of the timing
diagram also appears in the
symbol of the edge triggered
wiping relay.
T
H
T
H
N=1
T
L
=0
LOGO! functions