Mitsubishi Electric FR-A800 Series Instruction Manual page 546

• The motor may rotate slightly even if the offline auto tuning without motor rotation (Pr.96 Auto tuning setting/status =
"1") is selected. (It does not affect the tuning performance.)
Fix the motor securely with a mechanical brake, or before tuning, make sure that it is safe even if the motor rotates.
(Caution is required especially in vertical lift applications.)
• Tuning is not available during position control.
• Tuning may be disabled depending on the motor characteristics.
 Settings
• To perform tuning, set the following parameters about the motor.
First motor
Pr. motor Pr.
80 453
81 454
9 51
84 457
83 456
71 450
96 463
*1 Set Pr.71 Applied motor according to the motor to be used. According to the Pr.71 setting, the range of the motor constant parameter setting
values and units can be changed. (For other setting values of Pr.71, refer to
Motor
IPM motor
SPM motor
• For tuning accuracy improvement, set the following parameters when the motor constants are known in advance.
First motor
Pr.
702 743
707 744
724 745
725 746
*1 The setting is valid only when a value other than "9999" is set in both Pr.707 (Pr.744) and Pr.724 (Pr.745).
 Performing tuning
• Before performing tuning, check the monitor display of the operation panel or parameter unit if the inverter is in the state ready
for tuning. The motor starts by turning ON the start command while tuning is unavailable.
• In the PU operation mode, press
For External operation, turn ON the start command (STF signal or STR signal). Tuning starts.
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Second
Name
Motor capacity
Number of motor poles
Electronic thermal O/L relay
Rated motor frequency
Rated motor voltage
Applied motor
Auto tuning setting/status
Motor constant parameter
Ω, mH, and A unit setting
8090
9090
Second
Name
motor Pr.
Maximum motor frequency
Motor inertia (integer)
Motor inertia (exponent)
Motor protection current level
search engine
Setting value
Motor capacity (kW)
Number of motor poles (2 to 12)
Rated motor current (A)
Rated motor frequency (Hz)
Rated motor voltage (V)
8090, 8093 (IPM motor),
9090, 9093 (SPM motor)
1, 101
Pr.71 setting
Motor constant parameter
internal data setting
8093 (8094)
9093 (9094)
Setting value
Maximum motor frequency (Hz)
*1
Motor inertia
Jm = Pr.707 × 10^(-Pr.724) (kg·m
Maximum current level of the motor (%)
/ on the operation panel.
*1
page 528.)
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5.13 (C) Motor constant parameters
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5. PARAMETERS