High-Speed Counter Input Specifications (In6 To In9) - Omron CJ1M-CPU21 Operation Manual

I/O Specifications

High-speed Counter Input Specifications (IN6 to IN9)

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