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PARAMETERS
4
To set the motor constants without using the offline auto tuning data
The Pr. 92 and Pr. 93 motor constants may either be entered in [Ω] or in [mH]. Before starting operation,
confirm which motor constant unit is used.
z To enter the Pr. 92 and Pr. 93 motor constants in [Ω]
<Operating procedure>
1. Set any of the following values in Pr. 71.
2. Set "801" in Pr. 77.
(Only when the Pr. 80 and Pr. 81 settings are other than "9999", the parameter values of the motor
constants (Pr. 90 to Pr. 94) can be displayed. Though the parameter values of other than Pr. 90 to Pr. 94
can be displayed, they are parameters for manufacturer setting and shall not be changed.)
3. In the parameter setting mode, read the following parameters and set desired values:
4. Return the Pr. 77 setting to the original value.
5. Refer to the following table and set Pr. 84.
Note: 1. Pr. 82 and Pr. 90 to Pr. 94 values may only be read when the Pr. 80 and Pr. 81 settings are other
than "9999" (advanced magnetic flux vector control selected).
2. Set "9999" in Pr. 90 to Pr. 94 to use the standard motor constants (including those for the
constant-torque motor).
3. Set "3" (standard motor), "13" (constant-torque motor) or "23" (Mitsubishi standard motor SF-JR
4P (1.5kW or less)) in Pr. 71 to use the constants measured in the offline auto tuning. Set "4, 14
or 24" in Pr. 71 and change the motor constants to change the values measured in the offline
auto tuning.
4. 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
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.).
Star Connection
Motor
Delta Connection Motor
Setting
Standard motor 5 6
Constant-torque motor 15 16
Parameter
Number
Name Setting Range
Setting
Increments
Factory
Setting
90 Motor constant R1 0 to 50Ω, 9999 0.001Ω 9999
91 Motor constant R2 0 to 50Ω, 9999 0.001Ω 9999
92 Motor constant X1 0 to 50Ω, 9999 0.001Ω 9999
93 Motor constant X2 0 to 50Ω, 9999 0.001Ω 9999
94 Motor constant X 0 to 500Ω, 9999 0.01Ω 9999
Parameter
Number
Name Setting Range
Setting
Increments
Factory
Setting
84 Rated motor frequency 50 to 120Hz 0.01Hz 60Hz
Note: 1. Pr. 90 to Pr. 94 values may be read only when the Pr. 80 and Pr. 81 settings are other than
"9999" (advanced magnetic flux vector control selected).
2. Set "9999" in Pr. 90 to Pr. 94 to use the standard motor constants (including those for the
constant-torque motor).
3. If "star connection" is mistaken for "delta connection" or vice versa during setting of Pr. 71,
advanced magnetic flux vector control cannot be exercised normally.
