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Additional Information
• In Range Mode it is possible to apply a hysteresis to ranges in order to prevent Digital Out-
puts from toggling due to unwanted oscillating of an Encoder. Refer to 3-7-2 Hysteresis for
detailed information.
• Precautions When Setting Range Data
• Comparison Stoppage during Comparison of Ranges
The comparison operation stops for 1.5 ms from when the High-speed Counter Value falls
within the Upper Range Limit or Lower Range Limit for the range data. The other Counters,
however, do not stop comparisons.
Set the range data considering the time when the comparison is stopped.
For example, for the Range table shown in the following diagram, approximately 4.8 counts
occur during 1.5 ms when a 3.2 kHz pulse is input. This means that comparison does not
occur for Counter Values 101, 102, 103, and 104. During this period, the Output set under
the Output Pattern does not turn ON even if the Counter Value is within the range data
range.
Comparison starts again after this 1.5 ms has elapsed.
3.2-kHz
pulse
Counter Value matches
Lower Limit (falls within
range)
CJ-series High-speed Counter Units Operation Manual for NJ-series CPU Unit(W492)
100
101
Range Data 0
Upper Limit
Lower Limit
Range Data 1
Upper Limit
Lower Limit
Comparison stops for 1.5 ms
During this period, the output set under the output
pattern will not be turned ON even if the value falls
within the range data range.
3 Operation and Configuration
102
103
104
100
103
101
Range Data 2
105
Upper Limit
102
Lower Limit
Counter Value
104
105
3-27
3
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