Mitsubishi Electronics FR-V500 Troubleshooting Speed command does not match motor speed

Troubleshooting

6.4.6Speed command does not match motor speed

(1) Speed control

The speed command does not match the motor speed.

Have you set the motor type?

Y

Is the PLG setting correct?

Y

Does the speed command from the command device match the motor speed?

Y

Does the inverter's speed command match the motor speed?

Y

Does the speed command match the inverter's speed command?

Y

Does the speed remain unchanged if it is increased?

N

Please contact your sales representative.

N

Set the motor (Pr. 71).

N

Make the PLG setting correctly.

N

1)Check that the command device is not faulty.

2)The command is compounded with noise (check the shielding and wiring.)

N

The number of PLG pulses (Pr. 851) is wrong.

Set the number of PLG pulses.

N

Set the speed command bias and gain

(Pr. 902, Pr. 903).

Y

1)Torque is insufficient. Increase the torque restriction value as the torque restriction value is exceeded.

2)Check that the speed control proportional gain (Pr. 820) is not 0.

3)Increase the motor and inverter capacities as they are insufficient.

89