Справочник Пользователя для Mitsubishi Electronics FR-A700
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V/F pattern
4
4.10 V/F pattern
4.10.1 Base frequency, voltage (Pr. 3, Pr. 19, Pr. 47, Pr. 113)
(2) Set multiple base frequencies (Pr. 47, Pr. 113)
⋅ When you want to change the base frequency when switching two motors with one inverter, use the Pr. 47 Second V/F
(base frequency).
⋅ Pr. 47 Second V/F (base frequency) is valid when the RT signal in ON and Pr. 113 Third V/F (base frequency) is valid when
the X9 signal is ON. Assign the terminal for X9 signal input using any of Pr. 178 to Pr. 189 (input terminal function
selection).
selection).
Purpose
Parameter that must be Set
Refer to Page
Set motor ratings
Base frequency, base
frequency voltage
frequency voltage
Pr. 3, Pr. 19, Pr. 47, Pr. 113
Select a V/F pattern according to
applications
applications
Load pattern selection
Pr. 14
Automatically set a V/F pattern for
elevators
elevators
Elevator mode (automatic
acceleration/deceleration)
acceleration/deceleration)
Pr. 61, Pr. 64, Pr. 292
Use special motor
Adjustable 5 points V/F
Pr. 71, Pr. 100 to Pr. 109
Use the following parameters to adjust the inverter outputs (voltage, frequency) to the motor rating.
Parameter
Number
Name
Initial Value
Setting Range
Description
3
Base frequency
60Hz
0 to 400Hz
Set the frequency when the motor
rated torque is generated. (50Hz/60Hz)
rated torque is generated. (50Hz/60Hz)
19
Base frequency voltage
9999
0 to 1000V
Set the base voltage.
8888
95% of power supply voltage
9999
Same as power supply voltage
47
Second V/F (base frequency)
9999
0 to 400Hz
Set the base frequency when the RT
signal is ON.
signal is ON.
9999
Second V/F invalid
113
Third V/F (base frequency)
9999
0 to 400Hz
Set the base frequency when the X9
signal is ON.
signal is ON.
9999
Third V/F is invalid
(1) Setting of base frequency (Pr. 3)
⋅ When operating a standard motor, generally set the rated
frequency of the motor to Pr. 3 Base frequency. When running
the motor using bypass operation, set Pr. 3 to the same value
as the power supply frequency.
the motor using bypass operation, set Pr. 3 to the same value
as the power supply frequency.
⋅ If the frequency given on the motor rating plate is "50Hz" only,
always set to "50Hz". Leaving the base frequency unchanged
from "60Hz" may make the voltage too low and the torque
insufficient. It may result in an inverter trip due to overload.
Special care must be taken when "1" (reduced torque load) is
set in Pr. 14 Load pattern selection.
from "60Hz" may make the voltage too low and the torque
insufficient. It may result in an inverter trip due to overload.
Special care must be taken when "1" (reduced torque load) is
set in Pr. 14 Load pattern selection.
⋅ When using the Mitsubishi constant-torque motor, set Pr. 3 to
60Hz.
REMARKS
⋅ The RT(X9) signal acts as the second (third) function selection signal and makes the other second (third) functions valid. (Refer
to page 235)
⋅ In the initial setting, the RT signal is assigned to the RT terminal. 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.
V/F
V/F
V/F
Pr.19
Output voltage (V)
Output frequency
(Hz)
(Hz)
Pr.3
Pr.47
Pr.113
Pr.47
Pr.113