Rockwell Automation 20D PowerFlex 700S with Phase I Control Reference Manual - Manual (Page 20)

20 Rockwell Automation Publication PFLEX-RM002D-EN-E - August 2013
Chapter 1 Detail Drive Configuration and Operation
Inertia Test
The final test is the inertia calculation. The motor and load (machine) inertia is
used to set the bandwidth of the speed regulator. During the test the motor will
accelerate to the speed set in parameter 19 [Atune Spd Ref ] at a specified torque
set by parameter 129 [Atune Torq Ref ]. The test then calculates the time in
seconds to accelerate the motor at rated torque from zero to base speed and stores
that value in parameter 9 [Total Inertia].
Troubleshooting a “MC Commissn Fail” Fault during Autotune
The “MC Commissn Fail” fault occurs when either the Power Circuits
diagnostics test fails or one of the Motor Tests fails. To find out specifically why
the fault occurred, before clearing the fault, check the bits in the following
parameters: 552 [MC Diag Error 1], 553 [MC Diag Error 2], or 554 [MC Diag
Error 3].
Auxiliary Power Supply You may use an auxiliary power supply to keep the 700S control assembly
energized when input power is de-energized. This allows the main control board,
DriveLogix controller and any feedback option cards to continue operation. See
the PowerFlex 700S High Performance AC Drive Phase I Control, User Manual,
publication
20D-UM001 , for connection information.
See the PowerFlex 700S Auxiliary Control Power Supply option (20-24V-
AUX1), publication
PFLEX-IN021 , for detailed installation instructions.
Frames 9 & Up
You must set Par 153 [Control Options], bit 17 [Aux Pwr Sply] to enable this
feature.
Table 1 - Auxiliary Power Supply Specifications
Bus Regulation/Braking Description
This information serves as a supplement to the PowerFlex 700S AC Drive Phase I
Control User Manual, publication
20D-UM001 , addressing items specific to the
PowerFlex 700S bus regulation and dynamic braking. Please see the user manual
for details on the PowerFlex 700S dynamic braking wiring and setup and the
PowerFlex Dynamic Braking Resistor Calculator Selection Guide, publication
PFLEX-AT001 , for application techniques on dynamic braking.
Voltage Current (Min) Power (Min)
24V DC ± 5% 3 A 75 W