Rockwell Automation 1769-L23E-QB1B_L23E-QBFC1B_L23-QBFC1B CompactLogix Packaged Controllers Quick Start and User Manual - Manual (Page 214)

214 Publication IASIMP-QS010B-EN-P - October 2009
Chapter 3 Embedded I/O
9. Enter the counter’s maximum and minimum counts.
The highest maximum count you can use is +2147483647. The lowest
minimum count limit you can use is -2147483648.
10. Specify the counter mode you need for your application.
11. Use the Operational Mode pull-down menu to select the counter’s
operational mode.
Use this counter mode When your application requires this behavior
Ring Counter If the current count value is counting up and exceeds the
maximum count, the counter begins counting again from the
minimum count.
If the current count value is counting down and exceeds the
minimum count, the counter begins counting again from the
maximum count.
Linear Counter If the current count value is over or under the maximum and
minimum counts specified, counting stops and
overflow/underflow bits are set.
TIP
The operational modes that are available depend upon the
number of HSC counters you are using.
Use this table as a reference when determining what operation
modes you can use in your application.
Number of
Counters Counter Operational Mode Gate or Preset
Functionality
1 0 Any All
1…3 Not available
2 0 Any All
1 Any All
2 and 3 Not available