110 Rockwell Automation Publication 750-RM100A-EN-P - August 2019
Chapter 11 Application References
Autotune the Motor Side Inverter
Follow these Autotune steps to configure the motor side inverter.
Perform Direction Test
1. Stay at port 10, which is the port for Motor Side Inverter Control.
2. Navigate to parameter 10/11:910 [Autotune] and enter a value of 1
‘Direction Test’.
3. Start the drive. You can use the control bar feature in Connected
Components Workbench software, the start key on the HIM, or the
normal start signal.
4. Verify that the motor direction is forward.
5. Verify the polarity of the encoder feedback.
• Navigate to parameter 10/11:1832 [Enc VRef Sel] and select the
encoder feedback on the feedback card in port 5. For example, the value
would be 50004 ‘Port 5: Enc 0 FB’ when you use a 20-750-ENC-1 in
slot 5.
• View the result in parameter 10/11:1834 [Enc VRef ].
6. Stop the drive, using the control bar feature in Connected Components
Workbench software, the stop key on the HIM, or the normal stop signal.
7. Address the direction.
• If the direction is forward, proceed to the next step.
• If the direction is reverse, power down and physically reverse the motor
leads.
8. Address the polarity of the feedback signal.
• If the polarity is forward, proceed to the next step.
• If the polarity is reverse, power down and physically reverse the encoder
leads.
Perform the Rotate Motor ID Test
During the Rotate Motor ID Test, the motor rotates for approximately 15
seconds in the commanded direction. It runs at speeds up to 75% of motor
nameplate speed. You can execute this test with a motor that is disconnected
from the crane or with a lightly loaded condition. Lightly loaded conditions
include a motor that is connected to gearbox, cable drum, or cable and hook.
IMPORTANT During this test, the drive uses an internal reference that is positive (forward).
During operation and other tests, the drive uses an external reference that you
select. An external reference can include the HIM, analog input, or
communicated reference. The direction of rotation depends on the polarity
(direction) of that external reference. Make sure the external reference moves
the motor in the intended direction.
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