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Selection and protection of a motor
The setting range and increments of Pr. 82, Pr. 90 to Pr. 94 and Pr. 859 changes according to the setting value of Pr. 71 and
Pr. 96.
(1) Before performing offline auto tuning
Check the following before performing offline auto tuning.
Make sure Advanced magnetic flux vector control or General-purpose magnetic flux vector control (Pr. 80, Pr. 81) is
selected.
A motor should be connected. Note that the motor should be at a stop at a tuning start.
The motor capacity should be equal to or one rank lower than the inverter capacity. (note that the capacity should be
0.1kW or more)
A high-slip motor, high-speed motor and special motor cannot be tuned. (The maximum frequency is 120Hz.)
As the motor may run slightly, fix the motor securely with a mechanical brake or make sure that there will be no problem
in safety if the motor runs (caution is required especially in elevator). Note that tuning performance is unaffected even if
the motor runs slightly.
Offline auto tuning will not be performed properly if it is performed with a surge voltage suppression filter (FR-ASF-H/FR-
BMF-H) connected between the inverter and motor. Remove it before starting tuning.
Applied Motor Internal Stored Value ∗1 Direct Input Value ∗2
Auto Tuning Measured Value
∗3
Parameter
Number
Function Name Setting Range
Setting
Increments
Setting Range
Setting
Increments
Setting Range
Setting
Increments
82 Motor excitation current 0 to 500A, 9999 0.01A 0 to 500A, 9999 0.01A 0 to ****, 9999 1
90 Motor constant (R1) 0 to 50Ω, 9999
0.001Ω 0 to 50Ω, 9999 0.001Ω 0 to ****, 9999 1
91 Motor constant (R2) 0 to 50Ω, 9999
0.001Ω 0 to 50Ω, 9999 0.001Ω 0 to ****, 9999 1
92 Motor constant (L1) 0 to 1000mH, 9999 0.1mH 0 to 50Ω, 9999
0.001Ω 0 to ****, 9999 1
93 Motor constant (L2) 0 to 1000mH, 9999 0.1mH 0 to 50Ω, 9999
0.001Ω 0 to ****, 9999 1
94 Motor constant (X) 0 to 100%, 9999 0.1% 0 to 500Ω, 9999
0.01Ω 0 to ****, 9999 1
859 Torque current 0 to 500A, 9999
0.01A 0 to 500A, 9999 0.01A 0 to ****, 9999 1
∗1 When Pr. 71 = "0, 1, 40 or 50", or setting value of Pr. 96 read after performing offline auto tuning is not "3, 13, 23".
∗2 When Pr. 71 = "5, 6, 15, or 16"
∗3 When Pr. 71 = "3, 13, 23, 43 or 53" and setting value of Pr. 96 read after performing offline auto tuning is "3, 13, 23". Or when Pr. 71 = "4, 14, 24, 44 or 54".
POINT
This function is valid only when a value other than "9999" is set in Pr. 80 and Pr. 81 and Advanced magnetic flux
vector control or General-purpose magnetic flux vector control is selected.
Even when motors (other manufacturer's motor, SF-JRC, etc.) other than Mitsubishi standard motor (SF-JR
0.2kW or higher), high efficiency motor (SF-HR 0.2kW or higher), and Mitsubishi constant-torque motor (SF-
JRCA four-pole, SF-HRCA 0.2kW to 15kW) are used or the wiring length is long (30m or more as a reference),
using the offline auto tuning function runs the motor with the optimum operating characteristics.
Tuning is enabled even when a load is connected to the motor.
As the motor may run slightly, fix the motor securely with a mechanical brake or make sure that there will be no
problem in safety if the motor runs (caution is required especially in elevator). Note that tuning performance is
unaffected even if the motor runs slightly.
Reading/writing/copy of motor constants tuned by offline auto tuning are enabled.
The offline auto tuning status can be monitored with the operation panel.
Do not connect a surge voltage suppression filter (FR-ASF-H/FR-BMF-H) between the inverter and motor.