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Selection and protection of a motor
4
PARAMETERS
4.8.2 Applied motor (Pr. 71)
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 190)
Refer to the following list and set this parameter according to the motor used.
Setting of the used motor selects the thermal characteristic appropriate for the motor.
Setting is necessary when using a constant-torque motor. Thermal characteristic of the electronic thermal relay
function suitable for the motor is set.
Parameter
Number
Name Initial Value Setting Range Description
71 Applied motor 0 0, 1, 2, 20
Selecting the standard motor or constant-
torque motor sets the corresponding motor
thermal characteristic.
Pr. 71
Setting
Thermal Characteristic of the Electronic Thermal Relay Function
Motor ({ : used motor)
Standard
(SF-JR, etc.)
Constant-torque
(SF-HRCA, etc.)
0
(initial value)
Thermal characteristics of a standard motor
1 Thermal characteristics of the Mitsubishi constant-torque motor
2
Thermal characteristics of a standard motor
Adjustable 5 points V/F(Refer to page 92)
20 Mitsubishi standard motor SF-JR 4P(1.5kW(2HP) or less)
REMARKS
⋅ For the FR-F720-00250 and 00490 and the FR-F740-00126 and 00170, 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.
CAUTION
Make sure to 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 78
Pr. 12 DC injection brake operation voltage Refer to page 112
Pr. 100 to Pr. 109 (Adjustable 5 points V/F) Refer to page 92
Pr. 71
Standard Motor Setting
0, 2, 20
Constant-torque Motor Setting
1
Pr. 0 3% 2%
Pr. 12 4% 2%