Rockwell Automation 20G PowerFlex 750-Series AC Drives - Manual (Page 61)

Rockwell Automation Publication 750-RM002B-EN-P - September 2013 61
Drive Configuration Chapter 1
Flying Start - Enhanced Mode Reverse
Here is a motor spinning in the opposite direction of the commanded speed. In
Enhanced mode the detection takes a very short time and the motor is controlled
to zero speed and accelerated to the commanded speed.
P357 [FS Gain]
Sweep mode - The amount of time the detection signal (current) must be below
the setpoint. A very short time entered could cause false detections. Too long of a
time and detection could be missed.
Enhanced mode - It’s the Kp in the current regulator used in the detection
process. Used along with P358.
P358 [FS Ki]
Sweep mode - Integral term in voltage recovery, indirectly connected to time;
higher value can shorten recovery time but can cause unstable operation.
Enhanced mode - It’s the Ki in the current regulator used in the detection
process. Used along with P357.
P359 [FS Speed Reg Ki]
Sweep mode - The amount of time to sweep the frequency. A short time entered
produces a steep slope on the frequency. A higher value (longer time) produces a
flatter frequency sweep. Shown above.
Enhanced mode - It’s the Ki in the speed regulator used in the detection process.
Used along with P358.
PowerFlex 753 Flying Start - Rotating Reverse - Enhanced Mode
Frequency Speed Current
No Sweep necessary in Enhanced Mode