Before Performing Offline Auto Tuning - Mitsubishi Electric FR-F800 Instruction Manual

POINT POINT
• The function is enabled under Advanced magnetic flux vector control.
• Even if a motor other than Mitsubishi standard motors (SF-JR 0.4 kW or higher), high-efficiency motors (SF-HR 0.4 kW or
higher), Mitsubishi constant-torque motors (SF-JRCA 4P, SF-HRCA 0.4 kW to 55 kW), or Mitsubishi high-performance
energy-serving motor (SF-PR), such as other manufacturers' induction motors, SF-JRC, SF-TH, etc., is used, or when the
wiring length is long (approx. 30 m or longer), a motor can run with the optimum operation characteristics by using the offline
auto tuning function.
• Tuning is enabled even when a load is connected to the motor.
• During offline auto tuning, the motor rotation can be locked (Pr.96 = "1") or unlocked (Pr.96 = "101"). The tuning is more
accurate when the motor can rotate (unlocked).
• Reading/writing of the motor constants tuned by offline auto tuning are enabled. The offline auto tuning data (motor
constants) can be copied to another inverter with the operation panel.
• The offline auto tuning status can be monitored with the operation panel and the parameter unit.
Before performing offline auto tuning
Check the following points before performing offline auto tuning:
• A value other than "9999" is set in Pr.80 and Pr.81, and Advanced magnetic flux vector control.
• A motor is connected. (The motor should not be rotated by the force applied from outside during the tuning.)
• For the motor capacity, the rated motor current should be equal to or less than the rated inverter current. (It must be 0.4 kW
or higher.) If a motor with substantially low rated current compared with the rated inverter current is used, speed and torque
accuracies may deteriorate due to torque ripples, etc. Set the rated motor current to about 40% or higher of the rated
inverter current.
• The target motor is other than a high-slip motor, a high-speed motor, or a special motor.
• The highest frequency is 400 Hz.
• The motor may rotate slightly even if the offline auto tuning without motor rotation (Pr.96 Auto tuning setting/status = "1")
is selected. (The slight motor rotation does not affect the tuning performance.) Fix the motor securely with a mechanical
brake, or before tuning, make sure that it is safe even if the motor rotates. (Caution is required especially in vertical lift
applications.)
• Check the following points for the offline auto tuning with motor rotation (Pr.96 Auto tuning setting/status = "101").
Torque is not sufficient during tuning.
The motor can be rotated up to the speed close to the rated speed.
The mechanical brake is released.
• Offline auto tuning is not performed correctly when the surge voltage suppression filter (FR-ASF-H/FR-BMF-H) are inserted
between the inverter and motor. Be sure to remove them before performing tuning.
(C) Motor constant parameters
PARAMETERS
5
GROUP
C
343