Speed Command Does Not Match Motor Speed; Speed Control - Mitsubishi Electric FR-V500 Series Instruction Manual

Troubleshooting
6.4.7

Speed command does not match motor speed

(1) Speed control

The speed command does
not match the motor speed.
N
Have you set the
motor type?
Y
N
Is the encoder
setting correct?
Y
Does the speed command
N
from the command device
match the motor speed?
1) Check that the command device
is not faulty.
Y
2) The command is compounded with
noise (check the shielding and wiring.)
Does the inverter's speed
N
command match the motor
speed?
The number of encoder
pulses (Pr. 851) is wrong.
Y
Set the number of encoder
pulses.
Does the speed command
N
match the inverter's speed
command?
Y
Does the speed remain
Y
unchanged if it is
increased?
1) Torque is insufficient.
Increase the torque limit
N
value as the torque limit
value is exceeded.
2) Check that the speed control
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proportional gain (Pr. 820)
representative.
is not 0.
3) Increase the motor and
inverter capacities as they
are insufficient.
92
Set the motor (Pr. 71).
Make the encoder setting
correctly.
Set the speed command
bias and gain
(Pr. 902, Pr. 903).