Rockwell Automation 5720 DriveLogix System - Manual (Page 57)

Publication 20D-UM002C-EN-P - November 2003
What Is DriveLogix? 2-23
The following table shows the ratio between the continuous task and the
system overhead functions:
At the default time slice of 10%, system overhead interrupts the continuous
task every 9ms (of continuous task time).
The interruption of a periodic task increases the elapsed time (clock time)
between the execution of system overhead.
At this time slice: The continuous tasks runs for: And then overhead occurs for up
to:
10% 9 ms 1 ms
20% 4 ms 1 ms
33% 2 ms 1 ms
50% 1 ms 1 ms
Legend:
Task executes.
Task is interrupted (suspended).
1 ms 1 ms
system overhead
9 ms 9 ms
continuous task
5 10 15 20 25
elapsed time (ms)
1 ms 1 ms 1 ms 1 ms
periodic task
1 ms 1 ms
system overhead
9 ms of continuous task time 9 ms of continuous task time
continuous task
5 10 15 20 25
elapsed time (ms)