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(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.
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.
If the current fluctuates after tuning, adjust the constant by referring to the induced voltage constant, which can
be found in the data sheet.
Motor Pr. 71 Setting
IPM motor
MM-CF 334
Other than MM-CF 8094
Parameter
Number
Name
Setting Increments Read Value Setting
Range
Pr.684 = 0 Pr.684 = 1 Pr.71 = 334 Pr.71 = 8094
90 Motor constant (R1) Internal data
0.001/
0.01m
*3
Tuned data
*1
Tuned data
*1
0 to ***, 9999
92
Motor constant (L1)/d-
shaft inductance
Internal data
0.1mH/
0.01mH
*3
9999
*2
Tuned data
*1
0 to ***, 9999
93
Motor constant (L2)/q-
shaft inductance
Internal data
0.1mH/
0.01mH
*3
9999
*2
Tuned data
*1
0 to ***, 9999
711
Motor d-shaft
inductance Ld decay
ratio
Internal data 0.1% 9999
*2
Tuned data
*1
0 to ***, 9999
712
Motor q-shaft
inductance Lq decay
ratio
Internal data 0.1% 9999
*2
Tuned data
*1
0 to ***, 9999
721
Starting magnetic pole
position detection
pulse width
Internal data 1(s) 9999
*2
Tuned data
*1
0 to ***, 9999
859 Torque current Internal data
0.01A/0.1A
*3
Tuned data
*1
Tuned data
*1
0 to ***, 9999
*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%)
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.)
*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)
Parameter
Number
Name Setting Range Setting Increments Initial Setting
706 Induced voltage constant
0 to 5000
, 9999
0.1(mV/(rad/s)) 9999
*
* Setting "9999" sets a calculated value based on tuning.
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