Rockwell Automation 7000 PowerFlex Medium Voltage (B Frame) Commissioning - ForGe (PanelView 550) - Manual (Page 96)

92 Rockwell Automation Publication 7000-IN006B-EN-P - May 2013
Chapter 5 Commissioning the Drive
3. Press DISPLAY [F4]. Scroll down to Current Control and press [Enter],
then MODIFY [F7]. Scroll down to Idc Test Command and press [Enter].
Enter the number 0.1 pu and press [Enter]. Press EXIT [F10] twice and
press PREV PG. The value of Alpha Rectifier appears on this screen.
4. Press the drive START button. The drive should start pumping 0.1 pu
(10%) of rated current through the DC link. Alpha Rectifier should be
approximately 90°-92°.
We can also check the Idc Reference and Idc Feedback on this same screen.
Idc reference should be at 0.100 pu and Idc Feedback should be around
that same number. Ensure that Idc error stays around 0.
The Idc waveform can be observed from T21 (Idc1) on the ACB board.
The waveform should have an offset of 0.5V for each 0.1pu of Idc Test
Command. The waveform should also never have any of the low points
between ripples go to 0V. This would indicate a problem with the DC
Link cabling. See the troubleshooting section for sample waveforms.
5. Press MODIFY [F7], and increase Idc to .2 pu, and repeat the process.
Increase to 0.7 pu in 0.1pu steps for 18P, and 0.3 pu in 0.1pu steps for AFE,
verifying each level as you increase the current. For AFER, the Idc test is
limited to 0.3 Idc reference. If there is a current meter somewhere on the
input to the transformer/drive, check the current to ensure that it matches
expectations for drive performance.
6. When ready, decrease the IDC current in increments of .1 pu to 0, then
stop the drive. Return to the Feature Select parameter group and reset
Operating Mode to Normal.
Tuning Procedure Tune the PowerFlex 7000 ‘B’ Frame medium voltage drive to the connected
motor and load. There are three drive functions that require tuning. These are
listed below in the typical tuning order:
1. Rectifier
2. Mtr Impedance
3. FluxSpeedReg
Tune the first two functions with the motor stationary, but third function
requires the motor to rotate. In case the drive cannot complete the tuning, you
must tune it manually.
NOTE:
1. You require a minimum of SERVICE level access to complete manual
tuning. If you do not have SERVICE level access, please contact the
factory.
2. Confirm the following tuning parameter default values:
• Input Impedance (P#140)