Applied Motor (Pr. 71) - Mitsubishi Electric FR-F740-00023-EC Instruction Manual

⋅ The input specifications of the PTC thermistor
are shown on the right.
CAUTION
⋅ When the PTC signal was not assigned to Pr. 184 and the AU/PTC switchover switch was set to the PTC terminal function, the function
assigned to the AU terminal is always off. Reversely, when the PTC signal was assigned to Pr. 184 and the AU/PTC switchover switch was
set to the AU terminal function, a PTC thermal error (E.PTC) occurs since the function is always in a motor overheat state.
⋅ When you want to input a current, assign the AU signal to the other signal.
⋅ When terminal assignment is changed, the other functions may be affected. Please make setting after confirming the function of the AU
terminal.
♦ Parameters referred to ♦
Pr. 71 Applied motor Refer to page 85
Pr. 72 PWM frequency selection
Pr. 178 to Pr. 189 (Input terminal function selection)
Pr. 190 to Pr. 196 (Output terminal function selection)
Specifications of the AU terminal
3.7.2

Applied motor (Pr. 71)

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
Name
Number
71 Applied motor
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 146)
Refer to the following list and set this parameter according to the motor used.
Pr. 71
Thermal Characteristic of the Electronic Thermal Relay Function
Setting
0
Thermal characteristics of a standard motor
(initial value)
1 Thermal characteristics of the Mitsubishi constant-torque motor
Thermal characteristics of a standard motor
2
Adjustable 5 points V/F(Refer to page 71)
20 Mitsubishi standard motor SF-JR 4P(1.5kW or less)
REMARKS
⋅ For the 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.
Standard Motor Setting
Pr. 71
0, 2, 20
Pr. 0
Pr. 12
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 57
Pr. 12 DC injection brake operation voltage
Pr. 100 to Pr. 109 (Adjustable 5 points V/F)
Motor Temperature
Refer to page 130
Refer to page 90
Refer to page 96
Refer to page 12
Initial Value
0
Constant Torque Motor Setting
3%
4%
CAUTION
Refer to page 86
Refer to page 71
Selection and protection of a motor
PTC Thermistor Resistance Value (Ω)
Normal
Boundary
Overheat
Setting Range
Selecting the standard motor or constant-
0, 1, 2, 20 torque motor sets the corresponding motor
thermal characteristic.
Standard
(SF-JR, etc.)
1
2%
2%
0 to 500
500 to 4k
4k or higher
Description
Motor ( : used motor)
Constant torque
(SF-HRCA, etc.)
Pr.69 Pr.69
page 120 page 120
Pr. 72 Pr. 72
page 130 page 130
3
85