Rockwell Automation Allen-Bradley PowerFlex 520 Series, User Manual

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Rockwell Automation Publication 520-UM001K-EN-E - August 2021 257
Appendix J PowerFlex 525 PM Motor Configuration
Press the Start button (Take note of your Start Source settings P046,
P048, and P050. Default setting of P046 = 1 “Keypad”)
After completing the configuration and running the Auto Tune test, you may
need to perform additional configuration depending on whether you have an
open loop or closed loop system.
For an open loop system (A535 [Motor Fdbk Type] = 0 “None”), you may need to
adjust two parameters if you encounter momentary reverse startup after a
Start command is issued.
For a closed loop system (A535 [Motor Fdbk Type] = 4 “Quadrature” or 5 “Quad
Check”, you must perform an angle alignment after the Auto Tune test before
running the motor normally.
See Additional PM Motor Configuration on page 257 for instructions.
Additional PM Motor
Configuration
After completing the initial configuration, there are additional steps that need
to be performed to complete the whole PM motor setup.
For an open loop PM motor (iPM and sPM) control, some parameters need to
be adjusted to prevent reverse startup. For a closed loop PM motor (iPM), an
angle alignment procedure needs to be performed before the motor is run
normally.
Additional Setup for Open Loop PM Motor
After performing an autotune on an open loop PM motor, a momentary
“reverse startup” may occur. To prevent this from occurring, perform the
following steps:
1. Set A516 [PM Initial Sel] = 1 “HFI”.
2. Increase the value of A519 [PM HFI NS Cur] by 10%.
3. Perform a test run at a reference speed and check if the motor reverses.
4. If the motor reverses, repeat steps 2 and 3.
5. If A519 [PM HFI NS Cur] has reached its maximum value (200%):
• reset the value to the default (100%)
• set A516 [PM Initial Sel] = 2 “Six Pulse”
6. Perform a test run at a reference speed and check if the motor reverses.
7. If the motor reverses, repeat steps 2 and 3.
8. If A519 [PM HFI NS Cur] has reached its maximum value again and a
reverse motor startup still occurs, the motor setup has failed.
ATTENTION: If the drive was never operated before (new installation), verify
that safeguards are in place to remove power safely from the drive during an
unstable situation where the drive can produce undesired motion.