YASKAWA GA700 Technical Manual page 160

3.8 Auto-Tuning
• To execute Rotational Auto-Tuning, be sure that the drive is uncoupled from the motor. Otherwise, the drive
may malfunction. If Rotational Auto-Tuning is carried out with respect to a motor that is connected to a load,
the motor parameters will not be correctly calculated, and the motor could behave abnormally.
• However, if the load is 30% or less of the motor's duty rating, Auto-Tuning can be carried out while the motor is
connected to the load. If Rotational Auto-Tuning is carried out while connected to a load that is greater than
30%, not only will the correct acquisition of motor parameters be impossible, but it can be dangerous because
the motor may rotate abnormally.
• Check to make sure that the motor's magnetic brake is released.
• Make sure that external force from the machinery will not cause the motor to rotate.
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Precautions to Note before Stationary Auto-Tuning
• Confirm that the motor's magnetic brake is not open.
• Make sure that external force from the machinery will not cause the motor to rotate.
WARNING! Electrical Shock Hazard. When executing Stationary Auto-Tuning, voltage is applied to the motor before the motor
rotates.. Do not touch the motor until Auto-Tuning is completed. Failure to comply may cause electrical shock
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Precautions to Note before Stationary Auto-Tuning for Line-to-Line Resistance and
Stator Resistance Auto-Tuning
Even when V/f Control is selected, if the motor cable is long (50 m or longer), Stationary Auto-Tuning for Line-
to-Line Resistance should be carried out.
WARNING! Electrical Shock Hazard. When executing Stationary Auto-Tuning, voltage is applied to the motor before the motor
rotates.. Do not touch the motor until Auto-Tuning is completed. Failure to comply may cause electrical shock
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Precautions to Note before Inertia Tuning and ASR Tuning
Before performing Inertia Tuning or ASR Tuning, make sure that the following things are carried out.
WARNING! Electrical Shock Hazard. When executing Rotational Auto-Tuning, voltage is applied to the motor before the motor
rotate. Do not touch the motor until Auto-Tuning is completed. Failure to comply may result in injury or death from electrical
shock.
• Either perform rotational motor parameter tuning, or look at the motor's test report or nameplate and input the
values manually.
• Check to make sure that the motor's magnetic brake is released.
• Connect the motor and load.
• Make sure that external force from the machinery will not cause the motor to rotate.
• Make sure that the machinery is not of the type for which reverse rotation is prohibited. Inertia Tuning and ASR
Tuning cannot be carried out with machinery for which reverse rotation is prohibited.
• If it is all right for the motor to rotate during Auto-Tuning, check in the vicinity of the drive, motor, and
machinery to make sure that there are no issues related to safety.
Note:
If there are gears between the machinery and motor shaft, the use of Inertia Tuning and ASR Tuning may not be appropriate.
160 YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual