114 Rockwell Automation Publication MOTION-UM003K-EN-P - January 2019
Chapter 5 Configure Integrated Motion Using a PowerFlex 755 Drive
Figure 15 - Base Update Period Example
The Base Update Period is a trade-off between updating positions of your axes
and by scanning your code. For a ControlLogix® 5560 controller or
GuardLogix® 5560 safety controller, you can have 4 axes/ms and 8 axes/ms for
the ControlLogix 5570 controller.
For detailed information on the Axis Scheduling function, Axis Assignment
tab, and Alternate Update Period Scheduling, see Axis Scheduling on
page 145.
Integrated Architecture Builder
To help you determine motion system performance, use the motion
performance calculator in the Integrated Architecture Builder (IAB).
The IAB is a graphical software tool for configuring Logix-based automation
systems. It helps you select hardware and generate bills of material for
applications that include controllers, I/O, networks, PowerFlex drives,
On-Machineâ„¢ cabling and wiring, motion control, and other devices.
You can find the software at
http://www.rockwellautomation.com/en/e-tools/configuration.html
Motion Planner
Scans of your code and
system overhead.
0 ms 10 ms
20 ms 30 ms 40 ms
In this example, the Base Update Period = 10 ms. Every 10 ms the controller stops scanning your code and whatever else it is doing and
runs the motion planner.
To Next Page
Loading...
Need help?
General
