Mitsubishi Electric FR-A720-0.4K Instruction Manual page 508

(4) Utilizing or changing offline auto tuning data
The data measured in the offline auto tuning can be read and utilized or changed.
<Operating procedure>
1)Set Pr. 71 according to the motor used.
IPM motor
2) In the parameter setting mode, read the following parameters and set desired values.
The display units of the read motor constants can be changed with Pr. 684 Tuning data unit switchover.
Setting Pr.684 = "1" does not change the parameter settings.
Parameter
Number
90 Motor constant (R1)
Motor constant (L1)/d-
92
shaft inductance
Motor constant (L2)/q-
93
shaft inductance
711 inductance Ld decay
712 inductance Lq decay
Starting magnetic pole
721 position detection
859
*1 As the motor constants measured in the offline auto tuning have been converted into internal data (****), refer to the following setting
example when making setting:
Setting example To slightly increase Pr. 90 value (5%)
*2 Setting "9999" selects the IPM motor (MM-CF) constant.
*3 Initial values differ according to the inverter capacity. (55K or lower/75K or higher)
If the current fluctuates after tuning, adjust the constant by referring to the induced voltage constant, which can
be found in the data sheet.
Parameter
Number
706 Induced voltage constant
* Setting "9999" sets a calculated value based on tuning.
Motor
MM-CF
Other than MM-CF
Setting Increments
Name
Pr.684 = 0
Internal data
Internal data
Internal data
Motor d-shaft
Internal data
ratio
Motor q-shaft
Internal data
ratio
Internal data
pulse width
Torque current Internal data
When Pr. 90 is displayed "2516",

set 2642, i.e. 2516 1.05 = 2641.8, in Pr. 90 .
(The value displayed has been converted into a value for internal use. Hence, simple addition of a given value to the
displayed value has no significance.)
Name
Pr.684 = 1 Pr.71 = 334
0.001/
Tuned data
0.01m
*3
0.1mH/
9999
0.01mH
*3
0.1mH/
9999
0.01mH
*3
0.1% 9999
0.1% 9999
1(s) 9999
0.01A/0.1A
Tuned data
*3
Setting Range Setting Increments
0 to 5000 , 9999
11/24
Pr. 71 Setting
334
8094
Read Value
Pr.71 = 8094
Tuned data
*1 *1
Tuned data
*2 *1
Tuned data
*2 *1
Tuned data
*2 *1
Tuned data
*2 *1
Tuned data
*2 *1
Tuned data
*1 *1
Initial Setting
0.1(mV/(rad/s))
BCN-C22005-634
Setting
Range
,
0 to *** 9999
,
0 to *** 9999
,
0 to *** 9999
,
0 to *** 9999
,
0 to *** 9999
,
0 to *** 9999
,
0 to *** 9999
9999
*