262 Rockwell Automation Publication 520-UM001I-EN-E - July 2016
Appendix J PowerFlex 525 PM Motor Configuration
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 262 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.
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