3. Test Operation and Adjustment
3-6
CAUTION
Precautions for executing V/f control (constant torque) V/f control (variable torque) automatic
tuning
• During automatic tuning, the motor may rotate, so always confirm safety before starting automatic
tuning.
• Separate the motor from the load and machine, etc., and run the motor as a stand alone unit during
automatic tuning.
• Even when Mode 1 is executed, the motor may rotate due to vibration, etc.
If the vibration is large, turn the
key immediately to stop operation.
• Always check the safety on the load side before executing automatic tuning, regardless of the Mode 1
or 2 setting.
With Mode 2, the motor will automatically start rotating.
• If the automatic tuning function does not end correctly, always turn the inverter power OFF before
investigating or confirming the operation.
• Automatic tuning can be carried out only in the Local Mode.
• If the motor has an unstable frequency band, automatic tuning may not end normally. In this case, the
maximum torque boost function cannot be used.
• Always ground the motor and inverter.
• If the load is less than 30% and the fluctuation does not occur, automatic tuning can be carried out with
the load and machine connected. However, the performance may not be complete.
• Always carry out automatic tuning before using the maximum torque boost function.
• The contact output FLT will function if the automatic tuning does not end correctly. In equipment that
uses this contact, keep the operation of the related devices in mind.
