4-7
Chap. 4 RUNNING THE MOTOR
Tuning procedure
(1) Selection of tuning type
Check the situation of the machinery and select "Tuning with the motor stopped (P04* = 1)" or "Tuning with the motor running
(P04* = 2)." For the latter tuning, adjust the acceleration and deceleration times (F07 and F08) and specify the rotation direction
that matches the actual rotation direction of the machinery.
P04*
data
Tuning type Motor parameters subjected to tuning Tuning
Select under the
following conditions
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.
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, 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.
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
Set function code P04* to "1" or "2" and press the key. (The blinking of
1
or
2
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
1
or
2
lights up, and tuning starts with the motor stopped.
(Maximum tuning time: Approx. 40 to 80 s.)
If P04* = 2, after the tuning in
above, 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)
If P04* = 2, after the motor decelerates to a stop in
above, tuning continues with the motor stopped.
(Maximum tuning time: Approx. 40 to 80 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.
Upon completion of the tuning, the subsequent function code P06* appears on the keypad.
Tuning errors
Improper tuning would negatively affect the operation performance and, in the worst case, could even cause hunting or
deteriorate precision. Therefore, if the inverter finds any abnormality in the tuning results or any error in the tuning process, it
displays
er7
and discards the tuning data.
Listed below are possible causes that trigger tuning errors.
Possible tuning error causes Details
Error in tuning results
- An interphase voltage unbalance or output phase loss has been detected.
- Tuning has resulted in an abnormally high or low value of a parameter due to the output
circuit opened.
Output current error An abnormally high current has flown during tuning.
Sequence error
During tuning, a run command has been turned OFF, or STOP (Force to stop), BX (Coast to
a stop), DWP (Protect from dew condensation), or other similar terminal command has been
received.
Error due to limitation
- During tuning, any of the operation limiters has been activated.
- The maximum frequency or the frequency limiter (high) has limited tuning operation.
Other errors An undervoltage or any other alarm has occurred.
If any of these errors occurs, remove the error cause and perform tuning again, or consult your Fuji Electric representative.
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