IMPULSE
®
•G+ & VG+ Series 4 Technical Manual
November 2020
Page 67
4.4.4 Non-Rotational 2 Auto-Tune (T01-01 = 4)
This is a non-rotational Auto-Tuning method for the IMPULSE
®
•VG+ Series 4 VFD which allows for Auto-Tuning
without decoupling the motor.
This method is recommended when the motor cannot be decoupled, and the Motor Rated Slip is known. If the
Motor Rated Slip is not known, then the Non-Rotational 1 (T01-01 = 1) is recommended.
The instructions below will provide a step-by-step procedure to complete the non-rotational segment of this Auto-
Tune function:
1. In preparation for the Auto-Tune, the crane should be unloaded with minimal hook attachments.
2. Using the keypad, browse to the “Auto-Tuning” menu.
3. Choose “Tune-No Rotate2” (T01-01 = 4) for the Tuning Mode.
4. Enter the nameplate motor characteristics (T01-02 ~ T01-10) until the “Tuning Ready?” screen is reached.
5. Press the green “RUN” key to start the Auto-Tune. It will take up to a few minutes to complete. During this time,
the current will ramp up and down and a high pitched frequency may be audible coming from the motor; this is
normal. When the Auto-Tune has completed, the keypad display will display an “End Tune Successful”
message. Press the “ESC” key twice to exit.
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