Timer instructions Chapter 23
Rockwell Automation Publication 2080-RM001D-EN-E - February 2015 631
RTO increases an internal timer when its input is active, but does not reset its
internal timer when its input changes to inactive.
If using a Micro810 or Micro820 controller, the RTO internal timer does not
persist through a power cycle by default. To persist the internal timer, set the
Retained configuration parameter to true.
If using a Micro830 or Micro850 controller, the RTO internal timer will persist
through a power cycle.
Arguments
Parameter Parameter type Data type Description
IN Input BOOL If rising edge, starts increasing internal timer.
If falling edge, stops and does not reset the internal timer.
RST Input BOOL If rising edge, resets the internal timer.
PT Input TIME Maximum programmed time.
Q Output BOOL If TRUE, programmed time is elapsed.
ET Output TIME Elapsed time. Possible values range from 0ms to 1193h2m47s294ms.
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