5 Quick-response Inputs
5-2
CJ2M CPU Unit Pulse I/O Module User’s Manual
5-1 Overview
By setting an input on the Pulse I/O Module to quick-response input operation, inputs with signal widths
as small as 30 µs can be read with certainty regardless of the cycle time. Use the quick-response inputs
to read signals shorter than the cycle time, such as inputs from photomicrosensors.
The pulse widths of quick-response input signals must meet the following conditions.
END
Pulse signal from photomicrosensor or other device
CJ2M CPU UnitPulse I/O Module
Connecting Cable
Cycle time
Can read ON signals
shorter than this time.
Cycle time
Pulse signal
Input bit
ON for one scan
in the next cycle
I/O refresh
I/O refresh
Cyclic task
(ladder program)
Connector-
Terminal Block
Conversion Unit
150 µs min.
30 µs min.
ON
OFF
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