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LOGO! Manual
A5E00380835-01
Timing diagram
MI = Configured time interval
MN = Time-to-go
OT = Total time expired since the last hi signal at input Ral
Par:
Q
R
Ral
En
MN=MI
OT
MN=0
MI=5h
Functional description
The hours counter monitors input En. When En = 1, LOGO!
computes the time expired and the time-to-go MN. LOGO!
shows these times in parameter assignment mode. Output
Q is set when the time-to-go MN = 0.
A signal at reset input R resets output Q and sets the pre-
set value of MI at the counter for the duration of MN. The
internal total counter OT continues the count.
With a signal at the reset input Ral, you reset output Q and
set the preset value of MI at the counter for the duration of
MN. The internal total counter OT is reset to zero.
Depending on your configuration of parameter Q, the out-
put is either reset with a signal at input
R or Ral (”Q!0:R”), or when a reset signal is set hi, or the
En signal is set lo (”Q!0:R+En”).
LOGO! functions
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