Danfoss VLT AutomationDrive FC 301 Programming Manual page 80

VLT AutomationDrive FC 301/302
Programming Guide
Op- Name Description
tion
(X ) on induction motors. Ensure that the motor poles specified in parameter 1-39 Motor Poles are correct
h
for accurate back EMF measurement.
[6] Enable 360°
Sensorless: Performs a 360 degree test run in sensorless mode to verify the number of motor poles speci-
turn OL
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-
Use this option to ramp up in the mode as specified in parameter 1-01 Motor Control Principle. Measured
ertia run
inertia is set in parameter 1-69 System Inertia and parameter 7-08 Speed PID Feed Forward Factor is set to
90%.
-
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.
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.
Avoid generating external torque during AMA.
If 1 of the settings in parameter 1-2* Motor Data is changed, parameter 1-30 Stator Resistance (Rs) to parameter 1-39 Motor Poles
return to default setting.
AMA works problem-free on 1 motor size down, typically works on 2 motor sizes down, rarely works on 3 sizes down, and never
works on 4 sizes down. Keep in mind that the accuracy of the measured motor data is poorer when operating on motors smaller
than the nominal drive size.
80 | Danfoss A/S © 2022.12
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Parameter Descriptions
AU275636650261en-000101 / 130R0334