103
LOGO! Manual
A5E00067781 01
Timing diagram
R
Dir
Par
Cnt
0
Q
Internal
count value
Cnt
Description of function
At each positive signal edge at the input, Cnt either in-
creases the internal counter value by one (Dir = 0) or de-
creases it by one (Dir = 1).
If the internal counter value is greater than or equal to the
value specified for Par, the output Q is set to 1.
The Reset input R can be used to reset the internal counter
value and the output to ’000000’. As long as R=1, the out-
put remains set to 0 and the pulses at the input Cnt are not
counted.
Par parameter setting
B03:Par
Rem=off
Lim=
000100+
Count value
Retentivity
See the section ”Displaying/
hiding parameters – type of
protection” on page53
If the internal counter value is greater than or equal to Par,
output Q is set. The counter remains the same in the case
of under or overflow.
Lim can be anything between 0 and 999999.
Rem: This parameter switches the retentive feature of the
internal Cnt counter on an off.
off = No retentive feature
on = The Cnt counter can be stored retentively
LOGO! Functions
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