Omron CJ1M-CPU21, Operation Manual

Page: 50 / 267

21
I/O Specifications Section 3-1
High-speed Counter Input Specifications (IN6 to IN9)
Input 24-V DC inputs Line driver inputs
Set to 60 kHz
Set to 100 kHz Counting operations are unreliable at frequencies
higher than 60 kHz.
Phase-Z/Reset
input
ON
50%
OFF
ON
50%
OFF
ON
50%
OFF
T1 T2 T3 T4
16.6
µ
s min.
8.3
µ
s min. 8.3
µ
s min.
3
µ
s max. 3
µ
s max.
33.3
µ
s min.
T1, T2, T3, and T4: 4.0
µ
s min.
Phase-A/Phase-B encoder input, Single-phase
60-kHz pulse input with 50% duty ratio
Rise time and fall time: 3.0 s max.
Phase-A/Phase-B encoder input, Differential-
phase 30-kHz pulse input
Maintain a spacing of 4.0
µ
s min.
between phase-A/phase-B transitions
ON
50%
OFF
ON
50%
OFF
ON
50%
OFF
T1 T2 T3 T4
16.6
µ
s min.
8.3
µ
s min. 8.3
µ
s min.
33.3
µ
s min.
T1, T2, T3, and T4: 4.0
µ
s min.
Phase-A/Phase-B encoder input, Single-phase
60-kHz pulse input with 50% duty ratio
Phase-A/Phase-B encoder input, Differential-
phase 30-kHz pulse input
Maintain a spacing of 4.0
µ
s min.
between phase-A/phase-B transitions
ON
50%
OFF
ON
50%
OFF
ON
50%
OFF
T1 T2 T3 T4
10.0
µ
s min.
5.0
µ
s min. 5.0
µ
s min.
20.0
µ
s min.
T1, T2, T3, and T4: 2.5
µ
s min.
Single-phase 100-kHz pulse input with
50% duty ratio
Differential-phase 50-kHz pulse input
Maintain a spacing of 2.5
µ
s min. between Phase
A/Phase B transitions
ON
50%
OFF
30
µ
s min.
150
µ
s min.
Phase-Z encoder input (IN2 and IN3)
Maintain an ON time of 30
µ
s min.
and an OFF time of 150
µ
s min.
ON
50%
OFF
30
µ
s min. 150
µ
s min.
Phase-Z encoder input (IN2 and IN3)
Maintain an ON time of 30
µ
s min.
and an OFF time of 150
µ
s min.