4-3
2) Selection of tuning process
Check the situation of the machine system and choose between "Tuning while the motor is
stopped (P04 or A18 = 1)" and "Tuning while the motor is running (P04 or A18 = 2)." In the
case of "Tuning while the motor is running (P04 or A18 = 2)," also adjust the acceleration
and deceleration times (F07 and F08) and set the rotation direction properly so that it
matches the actual rotation direction of the machine system.
Data for
P04, A18
Motor parameters
subjected to tuning:
Tuning type
Selection condition
of tuning type
1
Primary resistance
(%R1)
Leakage reactance
(%X)
Tuning the %R1 and %X,
with the motor being
stopped.
The motor cannot be rotated,
or more than 50% of the rated
load would be applied on the
motor if rotated.
2
Primary resistance
(%R1)
Leakage reactance
(%X)
No-load current
Rated slip frequency
Tuning the %R1, %X and
rated slip frequency, with
the motor being stopped.
Tuning the no-load current,
with the motor running
at
50% of the base frequency.
Lastly, tuning the rated slip
frequency, with the motor
being stopped.
Even if the motor is rotated, it
is safe and the load applied
on the motor would be no
more than 50% of the rating.
(If you do the tuning with no
load, you will get the highest
precision.)
Upon completion of the tuning, each motor parameter will be automatically saved into the
applicable function code.
3) Preparation of machine system
Perform appropriate preparations on the motor and its load, such as disengaging the
coupling and deactivating the safety device.
Switch to the motor 1 or motor 2, which the tuning is to be performed on.
Tuning results by P04 will be applied to P codes for the motor 1, and the tuning results by
A18 will be applied to A codes for the motor 2.
Assigning the command "Switch to motor 2 SWM2" to any of the terminal [Y1],
[Y2], or [30A/B/C] will automatically switch the output status of SWM2 depending
on the motor selected for the tuning.
4) Perform tuning
Set function code P04 or A18 to "1" or "2" and press the key. (The blinking of
or
on the LED monitor will slow down.)
Enter a run command for the rotation direction selected. The factory default is " key
on the keypad for forward rotation." To switch to reverse rotation, change the data of
function code F02.
The display of
or
stays lit, and tuning takes place while the motor being stopped.
(Maximum tuning time: Approx. 40 s.)
If P04 or A18 = 2, the motor is accelerated to approximately 50% of the base frequency
and then tuning takes place. Upon completion of measurements, the motor will
decelerate to a stop.
Tuning will continue after the motor is stopped.
(Maximum tuning time: Approx. 10 s.)
If the terminal signal FWD or REV is selected as the run command (F02 = 1),
GPF
will appear upon completion of the measurements.
The run command is turned OFF. (The run command given through the keypad or the
communications link is automatically turned OFF).
The tuning completes and the next function code
R
or
C
appears on the keypad.
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