Rockwell Automation 20G PowerFlex 750-Series AC Drives - Manual (Page 56)

56 Rockwell Automation Publication 750-RM002B-EN-P - September 2013
Chapter 1 Drive Configuration
Scope Plots
Flying Start - Sweep Mode
This plot shows a coasting motor. When a start is commanded, the output
frequency jumps up to P520 [Max Fwd Speed]+ P524 [Overspeed Limit] at
some current. As the sweep frequency decreases the current is monitored. When
the sweep frequency matches the frequency of the coasting motor, the current
reverses and detection is complete. The motor is accelerated back to commanded
speed.
PowerFlex 753 Flying Start - Sweep Mode - Decelerating Load
Coasting Motor
Frequency Sweep
Start Pressed
Detection
Slope determined by P359
Frequency Speed Current