YASKAWA OYMC V1000, Programming Manual

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1.11 Auto-Tuning
244 YASKAWA ELECTRIC SIEP C710606 10A YASKAWA AC Drive - V1000 PRELIM. Programming Manual
• Before Auto-Tuning, be sure the input supply voltage equals or exceeds the motor rated
voltage. Performance can be enhanced by using a motor with a base voltage that is 20 V
(40 V for 400 V class models) lower than the input supply voltage. This may be of special
importance when operating the motor above 90% of base speed, where high torque
precision is required.
• Auto-Tuning is not possible with permanent magnet motors.
• To cancel Auto-Tuning, press the STOP key on the LED operator.
•
Table 1.43 describes digital input and output terminal status during Auto-Tuning.
Table 1.43 Digital Input and Output Operation During Auto-Tuning
WARNING! When Stationary Auto-Tuning is used in applications that utilize a mechanical brake, take
special precaution to ensure the brake stays applied. Auto-Tuning activates the drive multi-function outputs
as described in
Table 1.43 . Therefore, a brake controlled by the drive may be released while the motor is
uncoupled from the load, resulting in an unsafe condition. Proper precautions must therefore be taken prior
to performing Auto-Tuning.
Note: It is recommended that Rotational Auto-Tuning is performed with the load disconnected. Failure
to comply could result in improper drive operation. If Rotational Auto-Tuning is performed for a
motor coupled to a load, the motor constants will be inaccurate and the motor may exhibit
abnormal operation. Disconnect or decouple the motor from the load.
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Notes on Rotational Auto-Tuning
• For optimal performance, Auto-Tuning should only be done with the motor uncoupled
from the load for applications requiring high performance over a wide speed range.
• However, if motor and load can not be uncoupled, the load should be lower than 30% of
the rated load. Performing Rotational Auto-Tuning with higher load will set motor
parameters incorrectly, and can be dangerous as irregular motor rotation can occur.
• Ensure the motor-mounted brake is fully released if installed.
• Connected machinery should not produce enough power to rotate the motor.
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Notes on Stationary Auto-Tuning for Terminal Resistance Only
• If the motor cable lead length has been significantly modified after Auto-Tuning has
already been performed, perform Stationary Auto-Tuning with the new cables.
• Perform when using motor cables longer than 50 m with V/f Control.
WARNING! Electrical Shock Hazard. When executing stationary Auto-Tuning for line-to-line resistance only,
the motor does not rotate, however, power is applied. Do not touch the motor until Auto-Tuning is completed.
Failure to comply may result in injury from electrical shock.
Auto-Tuning Type Digital Input Digital Output
Rotational Auto-Tuning for V/f Control Not available Works the same as during normal operation
Rotational Auto-Tuning for OLV Control Not available Works the same as during normal operation
Stationary Auto-Tuning for Line-to-Line
Resistance
Not available Maintains the status at the start of Auto-Tuning