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3-28
3-6 Auto-tuning Mode
The auto-tuning function automatically tunes and sets the required motor parameters
when operating in the open-loop or flux vector control modes.
When the rated voltage, rated current, rated frequency, rated rotational frequency, and
number of poles listed on the motor’s nameplate have been input and the Run Key is
pressed, the motor parameters calculated from these values are written to E1-01
through E2-08 automatically.
The auto-tuning mode won’t be displayed if V/f control has been selected.
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Precautions for Auto-tuning Operation
Caution Do not connect a load to the motor when performing auto-tuning. Doing so may re-
sult in personal injury or equipment damage.
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The Inverter’s auto-tuning function automatically determines the motor parameters while a servo sys-
tem’s auto-tuning function determines the size of a load, so these auto-tuning functions are funda-
mentally different.
•
If a load is connected when auto-tuning is performed, not only will incorrect motor parameters be re-
corded, but the motor may operate erratically resulting in dangerous conditions such as loads falling
from vertical axis motors. Never perform auto-tuning with a load connected to the motor.
Preparing for Operation
Chapter 3