Omron CJ1W-CT021 Operation Manuals page 91

A Circular Counter has 32 bits (the full counting range) available to count up- or down over the pos-
itive counting range between 0 and the Upper Count Limit.
≤
1 Upper Count Limit
Count Up
Configuring Upper Count Limit
The Upper Count Limit can be set to a value between 1 and 4,294,967,295. By default, it is set to
the maximum possible count limit of +4,294,967,295.
With Circular Counters, the Counter automatically rolls over to 0 and continues counting, if the
Counter Value exceeds the Upper Count Limit. If the Counter Value goes below 0, the Counter rolls
over to the Upper Count Limit and continues counting.
Name of device variable
for CJ-series Unit
*_Ch1_UpCtLmtCfg
*_Ch2_UpCtLmtCfg
CJ-series High-speed Counter Units Operation Manual for NJ-series CPU Unit(W492)
≤
4,294,967,295 0
Rollover
Counter Value
Type Name
UDINT Upper Count Limit
Circular/Linear
3 Operation and Configuration
Count Down
Function
Set the upper count limit in the range of 0 to
4,294,967,295.
When 0 is set, this becomes 4,294,967,295.
3
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