Rockwell Automation 7000 PowerFlex Medium Voltage (B Frame) Commissioning - ForGe (PanelView 550) User Manual
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Rockwell Automation Publication 7000-IN006B-EN-P - May 2013
Chapter 5 Commissioning the Drive
2. Set parameter Autotune Select in the Autotuning parameter group to
Rectifier. The drive will go into DC Current test mode. The current
regulator bandwidth is set to Autotune Idc BW (212).
3. Start the drive. The dc current will increase to 0.2pu and stay at that level
for couple of seconds. The drive records the data under this condition and
then ramps up to approximately rated current. After staying at the level for
couple of seconds, the drive will again record the measured data and then
ramp the current to zero. The current regulator bandwidth is set back to
the original value. From the recorded data, the drive will calculate the
Autotune L Input (P217) and Autotune T DCLnk (218). At the end of
the tuning Input Impedance is set to Autotune L Input and T DC Link is
set to Autotune T DCLnk. During tuning if the values are determined to
be out of range, the drive will issue warnings indicated below. Try to tune
the drive again, but if the warnings persist, verify the result by tuning the
drive manually.
You may encounter one or more of the following warnings during Rectifier
tuning:
• L Input Low - indicates that the measured L Input is less than 0.02 pu. The
L Input must be tuned using the manual method described below.
• L Input High - indicates that the measured L Input is greater than 0.5 pu.
The L Input must be tuned using the manual method described below.
• T DC Link Low - indicates that the measured dc link time constant is less
than 0.020 second. The step response of the current regulator should be
checked using the manual method described below.
• T DC Link High - indicates that the measured dc link time constant is
greater than 0.150 second. The step response of the current regulator
should be checked using the manual method described below.
Input Impedance Manual Tuning
1. Set parameter Operating Mode in Feature Select to DC Current to enter
dc current test mode.
2. If not already at default value, set parameter Input Impedance in “Current
Control” to an initial value of 0.05 pu.
Figure 53 - Current control parameter screen
3. Energize the drive by closing the input contactor.