Datasheet

151
Programmable
Controllers
Two counter inputs, either single-phase, 100 kHz, or differential phases, 50 kHz
Use these inputs for either four interrupt inputs or four high-speed inputs
(with a minimum pulse width of 30
µ s).
Use Five or More Interrupt Inputs,
or Use High-speed Inputs for CPU Units Other Than
the CJ1M-CPU21/22/23
For example, in rotational speed measurements in inspection applications or
tact-time speed displays for conveyors, the speed can be monitored by
counting pulses without using a special speed calculation device.
The present value can be monitored during high-speed counter input by
using the PRV instruction.
CJ1M
CJ1M
High-speed line-driver inputs for either single-phase, 100 kHz, or differential phases, 50 kHz, can be input. (For 24 V DC: Single-phase, 60 kHz,
or differential phases, 30 kHz)
High-speed Counter Inputs
(CJ1M-CPU21/22/23)
Interrupt Inputs
(CJ1M-CPU21/22/23)
Interrupt Input Units with 16 points and High-speed Input Units
with 16 points can be used with any of the CJ1-series CPU Units
to add high-speed input or interrupt input capabilities to CPU
Units that do not support built-in pulse I/O. High-speed Input Units
read pulse signals with a minimum pulse width of 50 µs, and
Interrupt Input Units feature an interrupt response time of 370 µs.
High-speed Counter in Linear Mode
High-speed Counter Frequency (Speed) Measurements
High-speed Counter in Ring Mode
Incremental encoder
High-speed counter input
Electronic Component Assembly Processes
Inverter CJ1M
High-speed counter input
Incremental encoder
Motor
I/O
Electronic Component Conveyors and Similar Applications
Encoder or
other inspection
device
Application Example
Interrupt input
Interrupt ON
Counts the number of pulses for
a predetermined angle.
Interrupt OFF
Pulses from encoder
Pulse output
Servomotor
Inspection device rotated by motor.
High-speed
counter input
Interrupt input
Input from electronic
component generating pulse
Measured over this interval
Interrupts can be generated either on the rising or falling edge to enable
accurate recording or judgement of inspection data, such as that for
electronic components.
Encoder
CJ1M
Rotational speed
(r/sec)
(r/min)
(r/hour)
OR
Total number of
revolutions
Measure Revolution Data
High-speed counter input pulses can be converted to rotational
speed (or total number of revolutions) using the new PRV2(883)
instruction.
(Unit Ver. 2.0 or later)
(The rotational speeds r/min and r/hour are
supported for unit version 3.0 only.)
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