Rockwell Automation 1794-L34 FlexLogix Controller System User Manual - Manual (Page 84)

Publication 1794-UM001G-EN-P - January 2007
84 Develop Applications
If you use the default time slice of 20%, the system overhead
interrupts the continuous task every 4 ms (of continuous task time).
If you increase the time slice to 50%, the system overhead interrupts
the continuous task every 1 ms (of continuous task time).
If the controller only contains a periodic task(s), the system overhead
timeslice value has no effect. System overhead runs whenever a
periodic task is not running.
1 ms 1 ms 1 ms 1 ms 1 ms
system overhead
4 ms 4 ms 4 ms 4 ms 4 ms
continuous task
5 10 15 20 25
elapsed time (ms)
1 ms
system overhead
1 ms
continuous task
5 10 15 20 25
elapsed time (ms)
periodic task
system overhead
5 10 15 20 25
continuous task
elapsed time (ms)