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Counters C
3
SEQUENCE PROGRAMMING
3.10.2 Maximum counting speed of counter
The maximum counting speed of the counter is determined by the scan time, and the
counter can count only when the ON/OFF period of the input condition is longer than
the scan time.
REMARKS
The duty n is a percent (%) ratio of ON/OFF period to (ON + OFF period) of the count input
signal.
Maximum counting speed Cmax
100
n
ts
1
[times/s]
n: Duty (%)
ts: Scan time [s]
Count input signal
OFF
ON
T1 T2
100[%]n
T1 T2
T1
100[%]
n
T1 T2
T2
When T1 T2
When T1 T2