Rockwell-automation 5720 DriveLogix System Manual do Utilizador descarregar pdf (Página 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 10152025

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 10152025

elapsed time (ms)

1 2 ... 52 53 54 55 56 57 58 59 60 61 62 ... 262 263

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