V/F Pattern; Base Frequency, Voltage (Pr. 3, Pr. 19, Pr. 47) - Mitsubishi FR-F720-00046-NA Instruction Manual

4.5 V/F pattern

Purpose
Set motor ratings
Select a V/F pattern according to
applications
Use special motor
4.5.1

Base frequency, voltage (Pr. 3, Pr. 19, Pr. 47)

Used to adjust the inverter outputs (voltage, frequency) to the motor rating.
Parameter
Name
Number
3 Base frequency
Base frequency voltage
19
*
Second V/F (base frequency)
47
*
* The parameters can be set when Pr. 160 User group read selection = "0" (Refer to page 192)
Pr.19
(2) Set multiple base frequencies (Pr. 47)
⋅ 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 is ON.
REMARKS
⋅ The RT signal acts as the second function selection signal and makes the other second functions valid. (Refer to page 127)
⋅ In the initial setting, the RT signal is assigned to the RT terminal. By setting "3" to any of Pr. 178 to Pr. 189 (Input terminal function
selection), you can assign the RT signal to the other terminal.
Parameter that must be Set
Base frequency, base
frequency voltage
Load pattern selection
Adjustable 5 points V/F
Initial Value Setting Range
60Hz
9999
9999
(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.
⋅ 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
Output frequency
(Hz)
insufficient. It may result in an inverter trip due to overload.
Pr.3
Caution must be taken especially when Pr. 14 Load pattern
Pr.47
selection = "1" (variable torque load).
⋅ When using the Mitsubishi constant-torque motor, set Pr. 3 to
60Hz.
Pr. 3, Pr. 19, Pr. 47
Pr. 14
Pr. 71, Pr. 100 to Pr. 109
Set the frequency when the motor
0 to 400Hz
rated torque is generated. (50Hz/60Hz)
0 to 1000V Set the base voltage.
8888 95% of power supply voltage
9999 Same as power supply voltage
Set the base frequency when the RT
0 to 400Hz
signal is ON.
9999 Second V/F invalid

V/F pattern

Refer to Page
89
91
92
Description
89
4