Online Auto Tuning Selection (Pr. 95) - Mitsubishi Electric FR-A520-0.4K -55K Instruction Manual

To enter the Pr. 92 and Pr. 93 motor constants in [mH]
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<Operating procedure>
1. 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 (Pr. 82 to
Pr. 99) values of other than the motor constants (Pr. 90 to Pr. 94) can also be displayed, they are
parameters for manufacturer setting and should be handled carefully without misuse.
2. Set any of the following values in Pr. 71:
·
Standard motor ...................................................................................... Pr. 71 = "0"
·
Constant-torque motor........................................................................... Pr. 71 = "1"
·
Mitsubishi standard motor SF-JR 4 poles (1.5kW (2HP) or less).......... Pr. 71 = "20"
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 L1
93 Motor constant L2
94 Motor constant X
4. Refer to the following table and set Pr. 84:
Parameter
Name
Number
84 Rated motor frequency
5. Return the Pr. 77 setting to the original value.
Note: 1. 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).
Pr. 89 Î Refer to Pr. 80.
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Online auto tuning selection (Pr. 95)

Pr. 95 "online auto tuning selection"
By online auto tuning, the motor conditions are tuned rapidly at the start. This enables precise operation
unaffected by motor temperatures and steady high-torque operation down to super-low speed. After setting
the Pr. 80 and Pr. 81 values, select online auto tuning with Pr. 95.
Online auto tuning
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Use this function when steady high-torque operation is required for low-speed operation under advanced
magnetic flux vector control.
·
Before starting the online auto tuning, perform the offline auto tuning. Data must be calculated.
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Setting
Setting Range
Increments
0 to 50Ω, 9999 0.001Ω
0 to 50Ω, 9999 0.001Ω
0 to 1000mH, 9999 0.1mH
0 to 1000mH, 9999 0.1mH
0 to 100%, 9999 0.1%
Setting
Setting Range
Increments
50 to 120Hz 0.01Hz
Related parameters
Pr. 71 "applied motor"
Pr. 80 "motor capacity"
Pr. 81 "number of motor poles"
Pr. 83 "rated motor voltage"
Pr. 84 "rated motor frequency"
Pr. 89 "speed control gain"
Pr. 90 to Pr. 94 (motor constants)
Pr. 96 "auto tuning setting/status"
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PARAMETERS
Factory
Setting
9999
9999
9999
9999
9999
Factory
Setting
〈50Hz〉
60Hz