Applied Motor (Pr.71) - Mitsubishi Electric F700 Instruction Manual

Selection and protection of a motor
⋅ 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
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
Pr.69
page 114
relay function suitable for the motor is set.
Pr. 72
page 124
Parameter
Number
71 Applied motor
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 140)
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 66)
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.
Pr. 71
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
Pr.12 DC injection brake operation voltage
Pr. 100 to Pr. 109 (Adjustable 5 points V/F)
80
Refer to page 80
Refer to page 124
Refer to page 10
Name Initial Value
Standard Motor Setting
0, 2, 20
3%
4%
Refer to page 53
Refer to page 81
Refer to page 66
Motor Temperature
Normal
Boundary
Overheat
Refer to page 85
Refer to page 91
Setting Range
0 0, 1, 2, 20
Constant Torque Motor Setting
1
2%
2%
Caution
PTC Thermistor Resistance Value (Ω)
0 to 500
500 to 4k
4k or higher
Description
Selecting the standard motor or constant-
torque motor sets the corresponding
motor thermal characteristic.
Motor ( : used motor)
Standard Constant torque
(SF-JR, etc.) (SF-HRCA, etc.)