Mitsubishi Electric FR-A720-0.4K Instruction Manual page 199

Selection and protection of a motor
REMARKS
⋅ When performing offline auto tuning, set "3, 7, 8, 13, 17, 18, 23, 33, 43, 53" in Pr. 71.
(Refer to page 189 for offline auto tuning)
⋅ For the 5.5K and 7.5K, the Pr. 0 Torque boost and Pr. 12 DC injection brake operation voltage settings are automatically changed
according to the Pr. 71 setting as follows.
Standard Motor Setting
Pr. 71
0, 2, 3 to 8, 20, 23, 24, 40, 43, 44
Pr. 0
Pr. 12
(2) Use two types motors (Pr. 450)
⋅ Set Pr. 450 Second applied motor to use two types motors with one inverter.
⋅ When "9999" (initial value) is set, no function is selected.
≠ 9999, turning the RT signal ON makes the following parameter valid.
⋅ When Pr. 450
Function
Applied motor
Control method selection
Motor capacity
Number of motor poles
Motor excitation current
Rated motor voltage
Rated motor frequency
Motor constant (R1)
REMARKS
⋅ The RT signal acts as the second function selection signal and makes the other second functions valid.
⋅ The RT signal is assigned to the terminal RT in the initial setting. By setting "3" in any of Pr. 178 to Pr. 189 (input terminal function
selection), you can assign the RT signal to the other terminal.
CAUTION
⋅ Changing the terminal assignment using Pr. 178 to Pr. 189 (input terminal function selection) may affect the other functions. Set
parameters after confirming the function of each terminal.
Set this parameter correctly according to the motor used.
Incorrect setting may cause the motor to overheat and burn.
♦ Parameters referred to ♦
Pr. 0 Torque boost Refer to page 146
Pr. 12 DC injection brake operation voltage
Pr. 80 Motor capacity, Pr. 81 Number of motor poles, Pr. 453 Second motor capacity, Pr. 454 Number of second motor poles
Pr. 82 to Pr. 84, Pr. 90 to Pr. 94, Pr. 96, Pr. 455 to Pr. 463, Pr. 859, Pr. 860 (Motor constant)
Pr. 95 Online auto tuning selection, Pr. 574 Second motor online auto tuning
Pr. 451 Second motor control method selection, Pr. 800 Control method selection
Pr. 100 to Pr. 109 (Adjustable 5 points V/F)
188
Constant Torque Motor Setting
1, 13 to 18, 50, 53, 54
3%
4%
RT signal ON RT signal
(second OFF (first
motor) motor)
Pr. 450 Pr. 71
Pr. 451 Pr. 800
Pr. 453 Pr. 80
Pr. 454 Pr. 81
Pr. 455 Pr. 82
Pr. 456 Pr. 83
Pr. 457 Pr. 84
Pr. 458 Pr. 90
CAUTION
Refer to page 203
Refer to page 164
2%
2%
Function
Motor constant (R2)
Motor constant (L1)
Motor constant (L2)
Motor constant (X)
Auto tuning setting/status
Online auto tuning selection
Torque current
Refer to page 189
Refer to page 199
Refer to page 92
RT signal ON RT signal
(second OFF (first
motor) motor)
Pr. 459 Pr. 91
Pr. 460 Pr. 92
Pr. 461 Pr. 93
Pr. 462 Pr. 94
Pr. 463 Pr. 96
Pr. 574 Pr. 95
Pr. 860 Pr. 859
(Refer to page 235)
Refer to page 148