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Appendicies
A-3
Description of the Response Time
The Response Time of the CJ1W-CT021 High-speed Counter Unit is the time between the Unit receiv-
ing a count pulse (on one of the Counter inputs A or B) and the switching (ON or OFF) of a correspond-
ing Digital Output.
The Response Time can vary between 0.1 and 0.5 milliseconds, but is guaranteed to be less than 0.5
milliseconds. The following factors cause the Response Time to fluctuate:
• The number of Counters for which the range comparison or target-value comparison condition meets
simultaneously
The maximum Response Time of 0.5 milliseconds can no longer be guaranteed and will temporarily
become longer than 0.5 milliseconds in case you make use of:
• Programmable output ON
• Digital Inputs or Z-inputs
Additional Information
• When one of the above functions is used, the approximate response time will be as follows:
Response time = 0.5 ms + function execution time.
• A Digital Input or Z phase input takes about 300 µs.
A-16
CJ1W-CT021
Input
Output
circuitry
circuitry
A
B
Response Time to switch
Digital OutputON
Response Time to Switch
Digital Output OFF
CJ-series High-speed Counter Units Operation Manual for NJ-series CPU Unit(W492)
Digital Output
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