Before Auto-Tuning The Drive; Basic Auto-Tuning Preparations; Rotational Auto-Tuning For V/F Control; Rotational Auto-Tuning For Open Loop Vector Control - YASKAWA V1000 Series Installation & Start-Up Manual

4.7 Test Run

Before Auto-Tuning the Drive

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Check the items below before Auto-Tuning the drive:

Basic Auto-Tuning Preparations

• Auto-Tuning automatically determines the electrical characteristics of the motor. This is
fundamentally different from other types of Auto-Tuning features used in servo systems.
• 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.
• The next table describes digital input and output terminal status during Auto-Tuning.
Auto-Tuning Type
Auto-Tuning for Energy Savings in V/f Control
Rotational-Type Auto-Tuning
Auto-Tuning for Resistance between Lines
WARNING! When Auto-Tuning a motor that is used on an application in conjunction with a brake, take
special precaution to insure the brake stays applied. Auto-Tuning activates the drive multi-function outputs
per the table below. Therefore, a brake 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 be 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.

Rotational Auto-Tuning for V/f Control

• Motor rotates during Auto-Tuning.
• Sets parameters required for torque compensation, slip compensation, energy savings, and
speed search.
• Available only when the drive is set for V/f Control.
• Required to perform Estimation-Type Speed Search when using V/f Control.

Rotational Auto-Tuning for Open Loop Vector Control

• Used only when in Open Loop Vector Control.
• Perform only with the motor uncoupled from the load for applications requiring high
performance over a wide speed range.
• Disconnect the load before Auto-Tuning the drive and motor. Performing Rotational
Auto-Tuning with the load connected will set motor parameters incorrectly, and also be
dangerous because irregular motor rotation will occur.
• It is possible to perform Rotational Auto-Tuning with a connected load if the load is less
than 30% of the rated load.
• Ensure a motor-mounted brake is fully released.
156 YASKAWA ELECTRIC TOEP C710606 09B YASKAWA AC Drive V1000 Installation & Start-Up Manual
Digital Input
Not available Works the same during normal operation
Not available Works the same during normal operation
Not available Maintains the status at the start of Auto-Tuning
Digital Output