Inovance MD500T75G - Troubleshooting During Trial Run

MD500 User Manual 12. Troubleshooting
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12.2 Troubleshooting During Trial Run
This section provides the 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
reported during motor start
1. Set the motor parameters F1-01 to F1-05 according to the motor nameplate.
2. Select the proper motor auto-tuning mode by setting F1-37 and perform
motor auto-tuning. If possible, select the dynamic auto-tuning.
Poor torque or speed response
and motor oscillation at
speeds below 10 Hz
1. If motor torque and speed response are too slow, increase the setting of F2-00 (speed
loop proportional gain 1) or decrease the setting of F2-01 (speed loop integral time 1).
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 10 Hz
1. If motor torque and speed response are too slow, increase the setting of F2-03 (speed
loop proportional gain 2) or decrease the setting of F2-04 (speed loop integral time 4).
2. If motor oscillation occurs, decrease the setting of F2-03 and F2-04.
Low speed accuracy
If the speed error of the motor with load is big, increase the setting
of F2-06 (vector control slip compensation gain).
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Loud motor noise
Increase the setting of F0-15 (carrier frequency) properly.
Note that increase in carrier frequency will result in an
increase in the leakage current of the motor.
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Check whether the torque upper limit is small. If yes, please:
ƕ Increase the setting of F2-10 (digital setting of torque upper limit
in speed control mode) in the speed control mode.
ƕ Increase the torque reference (A0-03) in the torque control mode.
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Drive in Closed-loop Vector Control (F0-01 = 1)
This mode 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
reported during motor start
Set F1-27, F1-28 and F1-30 correctly.
Overload or overcurrent reported
during motor rotation
1. Set the motor parameters F1-01 to F1-05 according to the motor nameplate.
2. Select the proper motor auto-tuning mode by setting F1-37 and perform
motor auto-tuning. If possible, select the dynamic auto-tuning.
Poor torque or speed response
and motor oscillation at
speeds below 10 Hz
1. If motor torque and speed response are too slow, increase the setting of F2-00 (speed
loop proportional gain 1) or decrease the setting of F2-01 (speed loop integral time 1).
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 10 Hz
1. If motor torque and speed response are too slow, increase the setting of F2-03 (speed
loop proportional gain 2) or decrease the setting of F2-04 (speed loop integral time 4).
2. If motor oscillation occurs, decrease the setting of F2-03 and F2-04.
Low speed accuracy
If the speed error of the motor with load is big, increase the setting
of F2-06 (vector control slip compensation gain).
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