Rockwell Automation Motion Analyzer Software - Manual (Page 30)

30 Rockwell Automation Publication MOTION-UM004B-EN-P - October 2012
Chapter 1 Welcome to Motion Analyzer Software
1.2.2.4.1.1. Power Data Tab
Use the Power Data tab to view regeneration and motoring data for each axis.
Table 16 - Power Data Tab Properties (refer to Figure 22 )
Parameters Description
Axis Histograms
The axis histograms show a multi-axis representation of axis currents including Peak
Motoring, Average Motoring, Peak Regenerating, and Average Regenerating.
Random/Sync
Relationship
The phase relationship between the various axis motion profiles in a common DC bus
system affects the peak bus-current requirement. For example, if all axes accelerate
simultaneously (for example, synchronous operation), the bus current demand is much
greater than if each accelerates in turn. The pull-down menu lets you choose Random or
Synchronized mode for axes operation. At least one axis should be set to Random as the
reference axis. Other axes may be set to Synchronized or Random relative to the reference
axis. The safe setting for system sizing is all Random. In this case, the worst case current
demand for each axis is automatically lined up by adjusting the phase relationship of the
axis motion profiles. If the phase relationship is known and will not change, the Cycle
Profiles should be set up in the correct relationship and appropriate synchronized set. This
relationship is maintained by the system sizing algorithm and may result in a smaller
drive being selected.
Offset
If all axis motion profiles are the same length and start at their correct respective
positions at the default time, then the offsets will be zero. Otherwise, a specified time
offset may be used to align the motion profiles correctly.