Rockwell Automation 20P PowerFlex Digital DC Drive - Manual (Page 98)

98 Rockwell Automation Publication 20P-UM001I-EN-P - February 2013
Chapter 2 Drive Start Up
1. If an external supply is used to power the motor field, disconnect the
wires from the motor field terminals. If the drive supplies power to the
motor field, the internal field circuit will automatically be disabled
during this test.
2. Access the “Motor Control” file and the “Torq Attributes” group.
3. Set Par 7 [Current Limit] to the appropriate level for your application.
This parameter defaults to 150%. The drive’s armature output current
will correspond to Par 179 [Nom Mtr Arm Amps] x Par 7 [Current
Limit].
Note: Par 8 [Current Lim Pos], the drive current limit for the positive
direction and Par 9 [Current Lim Neg], the drive current limit for the
negative direction, are set to 150% by default. If necessary, you can
change the value of these parameters to suit your application.
4. Access the “Speed Feedback” group.
5. Verify that Par 414 [Fdbk Device Type] is set to 3 “Armature” (default).
6. Press the Esc key until you return to the “File” menu.
7. Access Par 452 [CurrReg Autotune] in the “Autotune” group, in the
“Motor Control” file, and select 1 “On.”
8. Press Enter.
The HIM displays “Ready for RL.”
9. Press the Start button on the HIM.
This will start the current regulator auto tuning test, which could take
several minutes.
At the end of the test, Par 453 [Arm Resistance] and Par 454 [Arm
Inductance] are updated. The drive is automatically stopped and Par 452
[CurrReg Autotune] will be set to 0 “Off ”.
It is also possible to manually tune the current regulator (other than
permanent magnet motors). See Manually Adjusting the Current
Regulator Tune Settings on page
302 for more information.
If a drive fault occurs during the tuning procedure, see Fault Descriptions
starting on
202 for a list of fault descriptions and actions.
IMPORTANT Verify that the motor does not start rotating (less than one-half a full turn)
during the Current Regulator tuning test (due to remnant magnetization,
series field, etc.). If necessary, mechanically block the motor shaft so it does not
turn.
IMPORTANT Programming inputs for 2-wire control deactivates the HIM start
and jog buttons.