Understanding The Virtual Backplane - Rockwell Automation Allen-Bradley DriveLogix 5730 User Manual

system overhead
continuous task
system overhead
continuous task
periodic task
system overhead
continuous task
Understanding the Virtual
Backplane
If you increase the time slice to 20%, the system overhead interrupts the
continuous task every 4 ms (of continuous task time).
1 ms
4 ms 4 ms
5
elapsed time (ms)
If you increase the time slice to 50%, the system overhead interrupts the
continuous task every 1 ms (of continuous task time).
1 ms
1 ms
5
elapsed time (ms)
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.
5
elapsed time (ms)
The DriveLogix5730 system has a five-slot virtual backplane. The
controller, drive and other components occupy different assigned slots on
the backplane.
Slot 0
DrvieLogix5730
Controller
1 ms 1 ms
4 ms
10 15
10 15
10 15
Virtual Backplane
Slot 1 Slot 2
Embedded PowerFlex 700S
EtherNet Option Drive
What is DriveLogix5730?
1 ms
4 ms 4 ms
20
20
20
Slot 3 Slot 4
Compact I/O NetLinx
Daughtercard
1-11
1 ms
25
25
25