Mitsubishi Electric FR-A700 Instruction Manual page 406

Selection and protection of a motor
Before performing offline auto tuning
Check the following before performing offline auto tuning.
● Make sure advanced magnetic flux vector control (Pr. 80, Pr. 81), real sensorless vector
control or vector control (Pr. 800) is selected (refer to section 5.1.7)
● A motor should be connected. Note that the motor should be at a stop at a tuning start.
● The motor capacity should be equal to or one rank lower than the inverter capacity (note
that the capacity is 0.4kW or more).
● The maximum frequency is 120Hz.
● A high-slip motor, high-speed motor and special motor cannot be tuned.
● Note the following when selecting offline auto tuning performed with motor running (Pr. 96
Auto tuning setting/status = "101"):
– Torque is not enough during tuning.
– The motor may be run at nearly its rated speed.
– The brake is open.
– No external force is applied to rotate the motor.
● Offline auto tuning will not be performed properly if it is performed with a surge voltage
suppression filter (FR-ASFH) connected to the 01800 or less and sine wave filter (MT-BSL/
BSC) connected to the 02160 or more between the inverter and motor. Remove it before
starting tuning.
● When exercising vector control, use the encoder that is coupled directly to the motor shaft
without looseness.Speed ratio should be 1:1.
b
CAUTION:
Even if tuning is performed without motor running (Pr. 96 "Auto tuning setting/status"
= "1"), the motor may run slightly.Therefore, fix the motor securely with a mechanical
brake, or before tuning, make sure that there will be no problem in safety if the motor
runs. (Caution is required especially in vertical lift applications). Note that if the motor
runs slightly, tuning performance is unaffected.
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