Rockwell Automation Publication MOTION-UM003K-EN-P - January 2019 145
Chapter 7
Axis Scheduling
This chapter describes how to configure the Axis Scheduling feature that is in
the Motion Group properties dialog box.
Axis Scheduling provides a way for you to configure drives to run at different
update rates. Axis Scheduling can improve the performance of your controllers.
You can use Axis Scheduling with integrated motion drives and virtual axes. By
using Axis Scheduling, you can optimize your controller, network, and drive
performance. For smaller controller applications (CompactLogixâ„¢), you can
expect to see a significant improvement in system performance.
Many applications have motion drives with different performance
requirements. At the simplest level, motion drives can be assigned into a ‘fast’
and ‘slow’ update rate groupings.
• The ‘fast’ group typically includes high-speed coordinated process
positioning drives with aggressive PCAM or interpolation profiles and
auxiliary functions like registration position/velocity phase correction.
• The ‘slow’ group typically includes non-coordinated motion drives used
for automatic machine reconfiguration, non-coordinated point-to-point
motion process drives, or coordinated drives with less aggressive PCAM
or gearing functions.
Topic Page
About Axis Scheduling 146
Timing Model 147
Axis Scheduling Configuration 150
Configure the Update Periods 151
Motion Utilization 158
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