User manual

Rockwell Automation Publication MOTION-UM003F-EN-P - March 2015 77
Chapter 3
Configure Axis Scheduling
This chapter describes how to configure the Axis Scheduling feature that is
located 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 (CompactLogix), 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 noncoordinated motion drives used for
automatic machine reconfiguration, noncoordinated point-to-point
motion process drives, or coordinated drives with less aggressive PCAM or
gearing functions.
Axis Scheduling is compatible with these products:
• ControlLogix L7x and later controllers
• GuardLogix L7x and later controllers
• CompactLogix 5370 and later controllers
• All Integrated Motion EtherNet/IP drives, for example, Kinetix,
PowerFlex and other third-party drives
Topic Page
Example Axis Scheduling Application 78
Axis Scheduling Configuration 79
Motion Utilization 87