4-9
Chap. 4 RUNNING THE MOTOR
Tuning procedure
(1) Selection of tuning type
Check the machinery conditions and perform the "tuning while the motor is rotating under vector control" (P04*=3). Adjust the
acceleration and deceleration times (F07 and F08) in view of the motor rotation. And specify the rotation direction that matches
the actual rotation direction of the machinery.
If the "tuning while the motor is rotating under vector control (P04*=3)" cannot be selected due to restrictions on the
machinery, refer to the " If tuning while the motor is rotating cannot be selected" below.
Drive control abbreviation: "V/f" (V/f control), "w/o PG" (vector control without speed sensor),
and "w/ PG" (vector control with speed sensor)
Drive control
P04*
data
Tuning type
Motor parameters
subjected to tuning
Tuning
Select under the
following conditions
V/f
w/o
PG
w/
PG
1
Tune while
the motor
stops
Primary resistance (%R1) (P07*)
Leakage reactance (%X) (P08*)
Rated slip frequency (P12*)
%X correction factor 1 and 2
(P53* and P54*)
Tuning with the motor
stopped.
Cannot rotate the
motor.
Y Y* Y*
2
Tune while
the motor is
rotating under
V/f control
No-load current (P06*)
Primary resistance (%R1) (P07*)
Leakage reactance (%X) (P08*)
Rated slip frequency (P12*)
Magnetic saturation factors 1 to 5
Magnetic saturation extension
factors "a" to "c" (P16* to P23*)
%X correction factor 1 and 2
(P53* and P54*)
Tuning the %R1 and %X,
with the motor stopped.
Tuning the no-load current
and magnetic saturation
factor, with the motor
running at 50% of the base
frequency.
Tuning the rated slip
frequency again, with the
motor stopped.
Can rotate the motor,
provided that it is safe.
Note that little load
should be applied
during tuning. Tuning
with load applied
decreases the tuning
accuracy.
Y N N
3
Tune while
the motor is
rotating under
vector control
No-load current (P06*)
Primary resistance (%R1) (P07*)
Leakage reactance (%X) (P08*)
Rated slip frequency (P12*)
Magnetic saturation factors 1 to 5
Magnetic saturation extension
factors "a" to "c" (P16* to P23*)
%X correction factor 1 and 2
(P53* and P54*)
Tuning the %R1, %X and
rated slip frequency, with
the motor stopped.
Tuning the no-load current
and magnetic saturation
factor, with the motor
running at 50% of the base
frequency twice.
Can rotate the motor,
provided that it is safe.
Note that little load
should be applied
during tuning. Tuning
with load applied
decreases the tuning
accuracy.
N Y Y
Y: Tuning available unconditionally Y*: Tuning available conditionally N: Tuning not available
The tuning results of motor parameters will be automatically saved into their respective function codes. If P04* tuning is
performed, for instance, the tuning results will be saved into P* codes (Motor 1* parameters).
(2) Preparation of machinery
Perform appropriate preparations on the motor and its load, such as disengaging the coupling from the motor and deactivating
the safety devices.
(3) Tuning (Tune while the motor is rotating under vector control)
Set function code P04* to "3" and press the key. (The blinking of
3
on the LED monitor will slow down.)
Enter a run command. The factory default is " key on the keypad for forward rotation." To switch to reverse rotation
or to select the terminal signal FWD or REV as a run command, change the data of function code F02.
The moment a run command is entered, the display of
3
lights up, and tuning starts with the motor stopped.
(Maximum tuning time: Approx. 40 to 75 s.)
Next, the motor is accelerated to approximately 50% of the base frequency and then tuning starts. Upon completion of
measurements, the motor decelerates to a stop.
(Estimated tuning time: Acceleration time + 20 to 75 s + Deceleration time)
After the motor decelerates to a stop in
above, tuning continues with the motor stopped.
(Maximum tuning time: Approx. 20 to 35 s.)
The motor is again accelerated to approximately 50% of the base frequency and then tuning starts. Upon completion of
measurements, the motor decelerates to a stop.
(Estimated tuning time: Acceleration time + 20 to 160 s + Deceleration time)
After the motor decelerates to a stop in
above, tuning continues with the motor stopped.
(Maximum tuning time: Approx. 20 to 30 s.)
If the terminal signal FWD or REV is selected as a run command (F02 = 1),
end
appears upon completion of the
measurements. Turning the run command OFF completes the tuning.
If the run command has been given through the keypad or the communications link, it automatically turns OFF upon
completion of the measurements, which completes the tuning.
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