Rockwell Automation Allen-Bradley PowerFlex 700 Series User Manual

Rockwell Automation Publication 750-QS100B-EN-P - August 2020 37
Step 7: Tune the Motor Side Inverter Control
7. Perform this step only if Flux Vector motor control is used. Address the motor velocity feedback polarity as
follows:
a. Ascertain by observation whether parameter 10:1044 [Motor Vel Fb] is positive (+) or negative (-) for the
application forward rotation direction.
b. Do one of the following:
• If the motor velocity feedback polarity is positive (+) for the application forward rotation direction, this test
is complete.
• If the motor velocity feedback polarity is negative (-) when the motor is rotating in the forward application
direction, proceed to the next substep.
c. Change the feedback polarity using one of the following two options:
• Stop the drive, shutdown, and safely lockout drive power sources. Exchange the encoder A and Anot wires
on the encoder module terminal board.
• Set the encoder configuration parameter to electronically invert the feedback polarity:
– If you are using a single encoder feedback module (20-750-ENC-1), navigate to parameter nn:1
[Encoder Cfg], where nn is the port where the motor encoder feedback module is installed. Press the
EDIT soft key. Edit the value using the HIM navigation keys to select bit 5 'Direction'. Enter a value of
1 to invert the polarity. Press the ENTER soft key.
– If you are using a dual encoder feedback module (20-750-DENC-1), navigate to parameter
nn:1 [Enc0 Cfg] or parameter nn:11 [Enc1 Cfg], where nn is the port where the motor encoder
feedback module is installed. Press the EDIT soft key. Edit the value using the HIM navigation keys to
select bit 5 'Direction'. Enter a value of 1 to invert the polarity. Press the ENTER soft key.
IMPORTANT If you are using another type of motor velocity feedback device, and/or the universal feedback
option module, the parameter numbers may be different than described here. See the PowerFlex
750-Series I/O, Feedback, and Power Option Modules Installation Instructions,
publication 750-IN111
, for more information about feedback option modules.
IMPORTANT If you reset parameters to defaults, this parameter is reset to (0) and the motor feedback may be negative, which may
cause loss of speed regulation and potential motor overspeed.

Rockwell Automation Allen-Bradley PowerFlex 700 Series Specifications

General

Brand	Rockwell Automation
Model	Allen-Bradley PowerFlex 700 Series
Category	DC Drives
Language	English