Mitsubishi Electric 800 Series Instruction Manual (Function page 398

Pr. Name
739 Second motor Ld decay
C231 ratio
740 Second motor Lq decay
C232 ratio
Second motor starting
741
resistance tuning
C282
compensation coefficient 1
742 Second motor magnetic
C285 pole detection pulse width
746 Second motor protection
C233 current level
*1 The setting range for the 575 V class is "0, 3, 5, 6, 10, 13, 15, 16, 30, 33, 8090, 8093, 9090, and 9093".
*2 The initial value for the FR-E820-0050(0.75K) or lower, FR-E840-0026(0.75K) or lower, FR-E860-0017(0.75K), and FR-E820S-0050(0.75K) or
lower is set to the 85% of the inverter rated current.
*3 The initial value differs according to the voltage class (200/400/575 V).
*4 The setting range and unit change according to the Pr.71 (Pr.450) setting.
• The settings are valid under PM sensorless vector control.
• The offline auto tuning enables the operation with IPM motors and SPM motors. (When a PM motor is used, always perform
offline auto tuning.)
• Tuning is enabled even when a load is connected to the motor.
• Reading/writing of the motor constants tuned by offline auto tuning are enabled.
• The offline auto tuning status can be monitored on the operation panel.
 Before performing offline auto tuning
Check the following points before performing offline auto tuning:
• Check that PM sensorless vector control is selected. (Refer to
• Check that a motor is connected. (Check that the motor is not rotated by an external force during tuning.)
• The rated motor current should be equal to or less than the inverter rated current. (Note that the motor rated current should
be 0.4 kW or higher (0.1 kW or higher for the 200 V class).)
If a motor with substantially low rated current compared with the inverter rated current, however, is used, speed and torque
accuracies may deteriorate due to torque ripples, etc. Set the rated motor current to about 40% or higher of the inverter
rated current.
• The maximum frequency under PM sensorless vector control is 400 Hz.
• Tuning is enabled even when a load is connected to the motor. The motor may run slightly. 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.) Note that even if the motor runs slightly, tuning performance is unaffected.
• Tuning may be disabled depending on the motor characteristics.
 Settings
• To perform tuning, set the following parameters about the motor.
First motor Pr. Second motor Pr.
80 453
81 454
9 51
84 457
83 456
71 450
96 463
Initial
Setting range
value
9999 0% to 100%, 9999
9999 0% to 100%, 9999
9999 0% to 200%, 9999
9999 0 to 6000 μs, 9999
100% to 500%
9999
9999
Name
Motor capacity
Number of motor poles
Electronic thermal O/L relay
Rated motor frequency
Rated motor voltage
Applied motor
Auto tuning setting/status
Description
Tuning data of the second motor.
(The value measured by offline auto tuning is automatically
set.)
9999: Inverter internal data is used.
Set the maximum current (OCT) level of the second motor.
200%
page 104.)
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
15. (C) Motor Constant Parameters
15.3 Offline auto tuning for a PM motor (motor constant tuning)
Setting
*1
11
12
13
14
15
16
17
18
19
20
397