Set V/F Pattern; Base Frequency, Voltage (Pr. 3, Pr. 19, Pr. 47) - Mitsubishi Electric FR-F740-00023-EC Instruction Manual
Frequency inverter
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Also See for FR-F740-00023-EC:
- Instruction manual (341 pages) ,
- Installation manuallines (36 pages) ,
- Instruction manual (264 pages)
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Set V/F pattern
3.4 Set V/F pattern
Purpose
Set motor ratings
Select a V/F pattern according to
applications
Use special motor
3.4.1
Base frequency, voltage (Pr. 3, Pr. 19, Pr. 47)
Used to adjust the inverter outputs (voltage, frequency) to the motor rating.
Pr. 2
page 66
Pr.4
Parameter
page 72
Number
Pr.18
page 66
3
Base frequency
Pr.20
page 79
Pr.46
Base frequency voltage
19
page 57
*
Pr.48
page 60
Second V/F (base frequency)
47
*
* The parameters can be set when Pr. 160 User group read selection = "0" (Refer to page 146)
Pr.19
(2) Set multiple base frequencies (Pr. 47)
⋅ When you want to change the base frequency when switching multiple 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 93)
⋅ 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.
68
Base frequency, base
frequency voltage
Load pattern selection
Adjustable 5 points V/F
Name
Initial Value
50Hz
8888
9999
Output frequency
(Hz)
Pr.3
Pr.47
Parameter that must be Set
Pr. 3, Pr. 19, Pr. 47
Pr. 14
Pr. 71, Pr. 100 to Pr. 109
Setting Range
0 to 400Hz
0 to 1000V
8888
9999
0 to 400Hz
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 commercial power supply-inverter switch-over
operation, set Pr. 3 to the same value as the power supply
frequency.
⋅ If the frequency given on the motor rating plate is "60Hz" only,
always set to "60Hz". It may result in an inverter trip due to
overload. Caution must be taken especially when Pr. 14 Load
pattern selection = "1" (variable torque load).
⋅ When using the Mitsubishi constant-torque motor, set Pr. 3 to
60Hz.
Refer to Page
68
70
71
Description
Set the frequency when the motor
rated torque is generated. (50Hz/60Hz)
Set the base voltage.
95% of power supply voltage
Same as power supply voltage
Set the base frequency when the RT
signal is on.
Second V/F invalid
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