Rockwell Automation Motion Analyzer Software - Manual (Page 255)

Rockwell Automation Publication MOTION-UM004B-EN-P - October 2012 255
Understanding Your System Solution Chapter 3
3.3.5. Apply RBM Selection
The initial period (70 ms) allows for the contactor change-over. The speed may
stay the same or increase if there an external load during this time and torque will
be zero. The peak torque depends upon the speed and may peak at a medium
speed, being less at higher and lower speeds. Check for distance continuing to
increase over a long period of time, which indicates a non-stopping condition.
Figure 200 - Axis May Not Stop Message
This error message indicates that the axis speed has not fallen close to zero in the
allotted time. This may apply to all resistive brake modules or only some of them.
Increase the allotted time to analyze further. There are several possible outcomes:
• Axis may stop with a longer time.
• Axis speed may reduce but not stop. Be careful to note if the axis speed has
really become zero and not a low speed—make sure that the position graph
is not increasing.
• Axis speed may increase to a sustained higher level.
• Axis may run-away; the speed may continue to increase.