Inovance MD500 Series - Troubleshooting During Trial Run

11. Troubleshooting
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11.2 Troubleshooting During Trial Run
This section provides solutions to oscillation, poor torque or speed response, or other problems that
occur while performing a trial run.
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Drive in Open-loop Vector Control (F0-01 = 0: Default value)
The AC drive implements control of the motor speed and torque without an encoder for speed
feedback. In this control mode, motor auto-tuning is required to obtain the motor related
parameters.
Problem Solutions
Overload or
overcurrent detected
during motor start
1. Set motor parameters F1-01 to F1-05 according to motor nameplate.
2. Select a proper motor auto-tuning mode by setting F1-37 and perform
motor auto-tuning. If possible, select dynamic auto-tuning (F1-37 = 2).
Poor torque or speed
response and motor
oscillation at speeds
below 5 Hz
1. If motor torque and speed response are too slow, increase the setting
of F2-00 (speed loop proportional gain 1) by 10 gradually or decrease
the setting of F2-01 (speed loop integral time 1) by 0.05 gradually.
2. If motor oscillation occurs, decrease the setting of F2-00 and F2-01.
Poor torque or speed
response and motor
oscillation at speeds
above 5 Hz
1. If motor torque and speed response are too slow, increase the setting
of F2-03 (speed loop proportional gain 2) by 10 gradually or decrease
the setting of F2-04 (speed loop integral time 4) by 0.05 gradually.
2. If motor oscillation occurs, decrease the setting of F2-03 and F2-04.
Low speed accuracy If speed error when motor runs with load is large, increase the setting of
F2-06 (vector control slip compensation gain) by 10% gradually.
Obvious speed
uctuation
If motor speed uctuation is large, increase the setting of F2-07 (SVC
torque lter time) by 0.001s gradually.
Too loud motor noise Increase the setting of F0-15 (carrier frequency) by 1.0 kHz gradually.
Note that increase in carrier frequency will result in an increase in the
leakage current of the motor.
Insufcient motor
torque
Check whether torque upper limit is small. If yes, please:
● Increase the setting of F2-10 (digital setting of torque upper limit in
speed control mode) in the speed control mode.
● Increase the torque reference (A0-03) in the torque control mode.
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Drive in Feedback Vector Control (F0-01 = 1)
It is applicable to the application with an encoder for speed feedback. In this mode, you need
to set the encoder pulses per revolution (F1-27), the encoder type (F1-28) and the encoder
direction (F1-30) correctly.
Problem Solutions
Overload or
overcurrent fault
detected during motor
start
Set F1-27, F1-28 and F1-30 correctly.
Overload or
overcurrent detected
during motor running
1. Set motor parameters F1-01 to F1-05 according to the motor
nameplate.
2. Select a proper motor auto-tuning mode by setting F1-37 and perform
motor auto-tuning. If possible, select dynamic auto-tuning (F1-37 = 2).