Siemens Logo! Manual page 181

4.4.14 Hours counter
Short description
A configured time is triggered with a signal at the monitor-
ing input. The output is set when this time has expired.
Symbol in
LOGO!
LOGO! Manual
A5E00380835-01
Wiring
Input R A positive edge (0 to 1 transi-
tion) at input R resets output Q
and sets a configured value MI
at the counter for the duration
of the time-to-go (MN).
Input En En is the monitoring input.
LOGO! scans the on-time of
this input.
Input Ral A positive edge at input Ral
(Reset all) resets both the
hours counter (OT) and the
output, and sets the configured
value MI at the counter to for
the duration of the time-to-go
(MN). That is,
S
S
S
LOGO! functions
Description
output Q = 0,
measured operating time
OT = 0 and
the time-to-go of the main-
tenance interval
MN = MI.
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