Mitsubishi Electric FR-A820-00046 Instruction Manual page 353

Parameters
Adjustment procedure
Adjust if any of phenomena such as unusual vibration, noise, current or overcurrent is produced by
the motor or machinery.
Change the Pr. 824 setting while checking the conditions.
If it cannot be adjusted well, change the Pr. 825 setting, and perform
Adjustment method
Set Pr. 824 lower and Pr. 825 longer. First, lower Pr. 824 and then check of there is still any abnormal vibration, noise or
current from the motor. If it still requires improvement, make Pr. 825 longer.
Pr. 824
Pr. 825
Tab. 5-52:
FR-A800
Torque control under Real sensorless vector control and vector control
Lower the setting by 10% increments and set a value that is approximately 0.8 to 0.9 times the setting value,
immediately before abnormal noise or current is improved.
If set too low, current ripple is produced and produces a sound from the motor that synchronizes with it.
Lengthen the current setting by doubling it each time and set a value that is approximately 0.8 to 0.9 times the
setting value, immediately before abnormal noise or current is improved.
If set too long, current ripple is produced and produces a sound from the motor that synchronizes with it.
Adjustment method for setting parameter 824 and 825
again.
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