Rockwell Automation Publication 2080-RM001D-EN-E - February 2015 267
Chapter 11
Counter instructions
Counter instructions are used to control operations based on the number of
events.
Function Description
CTD on page 268 Block counts (integers) from a given value down to 0, 1 by 1.
CTU on page 269 Counts (integers) from 0 up to a given value, 1 by 1.
CTUD on page 273 Counts (integers) from 0 up to a given value, 1 by 1, or from a given value down to 0 (1 by 1).
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