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2 maximum counting speed of counter – MITSUBISHI ELECTRIC 700 Series User Manual

Page 90

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85

Counters C

3

SEQUENCE PRO

G

RAM

M

ING

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