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Functional Descriptions (By Parameter No.)

MOTOR CONSTANT MEASUREMENT FUNCTION (Automatic tuning function) SELECT (Parameter No. 68)

ATTENTION

* When automatic tuning of the voltage compensation constant is started, the inverter will automatically apply a high DC voltage to the motor. Do not go near the motor, otherwise electric shocks may result.
*When automatic tuning of the slip compensation frequency is started, the inverter will automatically drive the motor at 60Hz. Do not go near the motor, otherwise personal injuries may result.

The "transition to automatic tuning mode setting" for the motor constants required for vector control and the recommended motor constants can be set.

Data setting value Details

0 Data value that indicates normal state.
(Set this to cancel the transition to the automatic tuning mode set with data No. 1 and 2.)

1 Sets the transition to the mode that automatically tunes the voltage compensation constant.
(After setting the data, press the LOCK button to enter the measurement state. Press the "FWD." or "REV." button to start the measurement.)

Data setting value	Details
2	Sets the transition to the mode that automatically tunes the slip compensation frequency. (After setting the data, press the LOCK button to enter the measurement state. Press the "FWD." or "REV." button to start the measurement.)
3	Changes the voltage compensation (parameter No. 69) and slip compensation frequency (Parameter No. 70) details to the recommended constants according to the data set in the motor capacity (parameter No. 66) and motor poles (parameter N0. 67). (When the data is set, the parameter No. 69 and 70 constants will be changed, and the normal state "0" will display automatically.)

Notes)

1. Automatic tuning is executed only when vector control is selected (when parameter No. 65 is set to "1").

2.Automatic tuning must be executed when the motor is completely stopped.

3.The slip compensation frequency must be automatically tuned when there is no load on the motor shaft.

4.The acceleration time during automatic tuning of the slip compensation frequency will be the value set in parameter No. 01. If the acceleration time is too fast, an overcurrent trip may occur, or the tuning may not be completed correctly.

(Automatic tuning operation procedure)

1. Set the transition to the automatic tuning mode. For voltage compensation constant measurement, set parameter No. 68 to "1". For slip compensation frequency measurement, set parameter No. 68 to "2".

2. Enter the measurement preparation state : Press the LOCK button, and enter the measurement preparation state.

3. Start automatic tuning : Press the "FWD" or "REV". button on the operation panel to start automatic tuning. * For voltage compensation constant measurement : The inverter will automatically apply a high DC voltage on the motor, and normally will finish the measurement in approx. 2 sec. * For slip compensation frequency measurement : The inverter will automatically drive the motor at 60Hz. Normally, the measurement will finish after the 1st acceleration time + 5 sec.

4. Complete automatic tuning. The display shown on the right will appear when automatic tuning is completed and the measurement data is automatically written into parameter No. 69 or 79. (Voltage compensation constant : parameter No. 69/slip compensation frequency : parameter No. 70)

5. Enter the operation preparation state (normal stop state). Press the STOP button on the operation panel, and enter the operation preparation state. Normal operation is now possible.

Notes)

1. Correct tuning of a special motor such as a high-speed motor or high-slip motor may not be possible. If the tuning results are not within the designated range, "Er1" or "Er2" will be displayed, and the inverter will trip. (The state can be reset by pressing the STOP button on the operation panel. The normal stop state will be entered.)

2. When tuning is correctly completed, parameter No. 69 or 70 will be changed to the measured data, and "END" will display. (The normal stop state can be returned to when the STOP button on the operation panel is pressed or when the power is turned off and on once.

Return to Homepage Return to KCL Help Go to Explanation Parameter No.68

Data setting value	Details
0	Data value that indicates normal state. (Set this to cancel the transition to the automatic tuning mode set with data No. 1 and 2.)
1	Sets the transition to the mode that automatically tunes the voltage compensation constant. (After setting the data, press the LOCK button to enter the measurement state. Press the "FWD." or "REV." button to start the measurement.)