Symmetrical Clock Pulse Generator - Siemens LOGO! 24RC Manual

LOGO! Functions

4.4.13 Symmetrical Clock Pulse Generator

Brief description
A clock pulse with a definable period length is output at the
output.
Symbol in
LOGO!
Parameter T
Please refer to the note in Section 4.3.2 when specifying
the values.
Timing diagram
En
Q
The bold part of the timing diagram appears in the symmetrical
clock pulse generator symbol.
Description of function
The parameter T specifies the length of the on and off peri-
ods. Use the En (enable) input to switch the clock pulse
generator on. The pulse generator sets the output to 1 for
the time T, then to 0 for the time T and so on until the En
input is a 0.
108
Connection
Input En
Parameter T
Output Q
T
T T
Description
The En input switches the
clock pulse generator on
and off.
T is the time for which the
output is switched on or off.
Q switches on and off cycli-
cally in time with the pulse
period T.
T
LOGO! Manual
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