Rockwell Automation 7000A PowerFlex Medium Voltage AC Drive - Air-Cooled (A Frame) - Manual (Page 229)

Commissioning 4-75
7000 “A” Frame 7000A-RM001A-EN-P – January 2011
Parameter
FlxCmd RatedLoad in Flux Control is set to a value
calculated to produce rated voltage at rated speed and load. The value
of parameters Autotune T rotor and Autotune Lmd are calculated from
the step response data.
If the flux regulator auto-tuning is successful, then parameter Lm Rated
in Motor Model is set equal to Autotune L Magn, parameter T Rotor in
Motor Model is set equal to Autotune T Rotor, and parameter Lmd in
Motor Model is set equal to Autotune Lmd. Parameter Total
Inertia(63) in Speed Control is set equal to Autotune Inertia. If the
flux regulator auto-tuning fails a warning is issued indicating the cause
of the failure.
L Magnetize Low – indicates that the measured value of magnetizing
inductance is less than 1.0 pu. This warning is intended to draw
attention to an unusually low value of magnetizing inductance. The
most likely cause is incorrect scaling of the analog field current
reference.
L Magnetize High – indicates that the measured value of magnetizing
inductance is greater then 15.0 pu. This warning is intended to draw
attention to an unusually high value of magnetizing inductance. The
most likely cause is incorrect scaling of the analog field current
reference.
T Rotor Low – indicates that the calculated value of rotor time
constant is less than 0.2 seconds
T Rotor High – indicates that the calculated value of rotor time
constant is greater than 5.0 seconds.
Regulator Limit - indicates that the torque command was greater than
Trq Lmt Motoring or Trq Lmt Braking. The measured
inertia value is invalid. Parameter Autotune Trq Stp or parameter
Autotune Spd Cmd must be set to a lower value and the test repeated.
Tuning Abort - indicates that the deviation in motor speed was greater
than 10 Hz. The measured inertia value is invalid. Parameter
Autotune Trq Stp must be set to a lower value and the test repeated.
Inertia high - indicates that the measured total inertia is greater than
20.0 seconds. This warning is intended to draw attention to an
unusually high inertia value. For a very high inertia load such as a
large fan, this may be a valid result and parameter Total Inertia
should be manually set equal to Autotune Inertia. However, a high
inertia measurement could also be produced by a value of Autotune
Trq Stp which is too low.