Rockwell Automation 20G PowerFlex 750-Series AC Drives - Manual (Page 40)

40 Rockwell Automation Publication 750-RM002B-EN-P - September 2013
Chapter 1 Drive Configuration
Autotune Parameters
P71 [Autotune Torque]
Typically the default value of 50% is sufficient for most applications. You have the
option of increasing this value or decreasing the value.
P73 [IR Voltage Drop]
The voltage drop due to resistance.
P74 [Ixo Voltage Drop]
The voltage drop due to Inductance.
P75 [Flux Current Ref ]
The current necessary to flux up the motor. This value come from a lookup table
for Static tunes and is measured during a Rotate tune. Obviously a rotate tune
gives more accurate results.
P76 [Total Inertia]
Reported as seconds of inertia. See description above.
P77 [Inertia Test Lmt]
A number entered in this parameter limits the inertia tune test to a maximum
number of revolutions. If violated, the drive faults on F144 “Autotune Inertia.”
Also, when a value is entered and the drive determines that the number of
revolutions will be exceeded it goes into a decel and stops before the value is
exceeded.
P78 [Encdrlss AngComp] and P79 [Encdrlss VltComp]
These parameters are valid only for Flux Vector motor control mode and open
loop. P78 is populated only by a rotate tune. P79 is populated by a Static
measurement.
P80 [PM Cfg]
This configuration parameter enables certain tests to be performed based on the
motor connected.
Permanent Magnet Motors
Parameters P81 through P93 and P120 are all populated by an autotune when
the motor selected is permanent magnet. The value for these parameters are
determined only by a rotate tune.
Interior Permanent Magnet Motors
Parameters P1630 through P1647 are all populated by an autotune when the
motor selected is interior permanent magnet. The value for these parameters are
determined only by a rotate tune.