•
•
•
•
•
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-
-
Op-
tion
Name
Description
Do
not
select this option if an LC filter is used between the drive and the motor. For best performance, it is
recommended to obtain the advanced motor data from the motor manufacturer to enter into
parameter
1-31 Rotor Resistance (Rr)
through
parameter 1-36 Iron Loss Resistance (Rfe)
. Complete AMA cannot be per-
formed on permanent magnet motors.
[2]
Enable Re-
duced AMA
Performs a reduced AMA of the stator resistance R
s
in the system only. This option is available for standard
asynchronous motors and non-salient PM motors.
[3]
Enable re-
duced AMA
II
Performs AMA of the stator resistance R
s
, the rotor resistance R
r
, the stator leakage reactance X
1
, the rotor
leakage reactance X
21
, and the main reactance X
h
.
[4]
Enable re-
duced AMA
II
Performs a reduced AMA of the stator resistance R
s
in the system only. Select this option if an LC filter is
used between the drive and the motor. The AMA II is a variant of AMA, based on the principles of the tor-
que calibration. It is recommended for special motors (for example S3) and high-power motors.
[5]
Enable ro-
tating AMA
II
Performs rotation with 60% of nominal speed in Flux Sensorless with soft PID independent of selection in
parameter 1-01 Motor Control Principle
. Measures Back EMF on PM motors and re-measures main reactance
(X
h
) on induction motors. Ensure that the motor poles specified in
parameter 1-39 Motor Poles
are correct
for accurate back EMF measurement.
[6]
Enable 360°
turn OL
Sensorless:
Performs a 360 degree test run in sensorless mode to verify the number of motor poles speci-
fied in
parameter 1-39 Motor Poles
.
Closed loop:
Performs a 360 degree test run in sensorless mode to test the encoder before running in
closed loop. The speed is set in
parameter 3-19 Jog Speed [RPM]
. During the test run, the direction of rota-
tion is verified and the number of pulses per revolution is verified to match the configuration in
parameter
group 17-** Motor Feedb. Option
or
parameter group 5-** Digital In/Out
based on the selected encoder.
After completing the 360 degree test run, either of the following messages are shown:
Encoder/Resolver OK
Encoder/Resolver Fail
Encoder/Resolver Inverted
Encoder/Resolver resolution/poles low
Encoder/Resolver resolution/poles high
The
parameter 1-41 Motor Angle Offset
is automatically set when using PM motor and absolute encoder or
resolver.
[7]
Enable in-
ertia run
Use this option to ramp up in the mode as specified in
parameter 1-01 Motor Control Principle
. Measured
inertia is set in
parameter 1-69 System Inertia
and
parameter 7-08 Speed PID Feed Forward Factor
is set to
90%.
N O T I C E
For the best adaptation of the drive, run AMA on a cold motor.
AMA cannot be performed while the motor is running
AMA cannot run with a sine-wave filter connected.
N O T I C E
It is important to set
parameter group 1-2* Motor Data
correctly, since these form part of the AMA algorithm. Perform an AMA to
achieve optimum dynamic motor performance. It may take up to 10 minutes, depending on the power rating of the motor.
N O T I C E
Avoid generating external torque during AMA.
AU373327181955en-000101 / 130R1208 | 69
Danfoss A/S © 2021.08
Parameter Descriptions
VLT® AutomationDrive EZ FC 321
Programming Guide
