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Mitsubishi Electric FR-A500 Instruction Manual Page 130

Transistorized inverter.
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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 (2HP) 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.).
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.
To enter the Pr. 92 and Pr. 93 motor constants in [Ω]
<Operating procedure>
1. Set any of the following values in Pr. 71.
Standard motor
Setting
Constant-torque motor
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:
Parameter
Name
Number
90
Motor constant R1
91
Motor constant R2
92
Motor constant X1
93
Motor constant X2
94
Motor constant X
4. Return the Pr. 77 setting to the original value.
5. Refer to the following table and set Pr. 84.
Parameter
Name
Number
84
Rated motor frequency
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.
Star Connection
Delta Connection Motor
Motor
5
15
Setting
Setting Range
Increments
0 to 50 , 9999
0.001
0 to 50 , 9999
0.001
0 to 50 , 9999
0.001
0 to 50 , 9999
0.001
0 to 500 , 9999
0.01
Setting
Setting Range
Increments
50 to 120Hz
0.01Hz
121
PARAMETERS
6
16
Factory
Setting
9999
9999
9999
9999
9999
Factory
Setting
60Hz <50Hz>
4

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