
(G) Control parameters
591
5
GROUP
G
5.16.2
Base frequency, voltage
Setting of base frequency (Pr.3)
• When operating a standard motor, generally set the rated frequency of the motor in
Pr.3 Base frequency
. When the motor
operation require switching to the commercial power supply, set the power supply frequency in
Pr.3
.
• When the frequency described on the motor rating plate is 50 Hz only, make sure to set to 50 Hz. When it is set to 60 Hz,
the voltage will drop too much, causing insufficient torque. As a result, the inverter may trip due to overload.
A caution is required especially in case of
Pr.14 Load pattern selection
= "1" (variable torque load).
Setting multiple base frequencies (Pr.47, Pr.113)
• To change the base frequency when using single inverter switching between multiple motors, use
Pr.47 Second V/F (base
frequency) and Pr.113 Third V/F (base frequency)
.
•
Pr.47
will become enabled when the RT signal turns ON and
Pr.113
when the X9 signal turns ON. To input the X9 signal,
set "9" in any of
Pr.178 to Pr.189 (Input terminal function selection)
to assign the function to a terminal.
NOTE
• The RT (X9) signal acts as the second (third) function selection signal and makes the other second (third) functions valid.
(Refer to
.)
• The RT signal is assigned to the terminal RT in the initial status. It is also possible to assign the RT signal to other terminal by
setting "3" on
Pr.178 to Pr.189 (Input terminal function selection)
.
Use this function to adjust the inverter outputs (voltage, frequency) to match with the motor rating.
Pr.
Name
Initial value
Setting
range
Description
3
G001
Base frequency
60 Hz
0 to 590 Hz
Set the frequency at the rated motor torque. (50 Hz/60 Hz)
19
G002
Base frequency voltage
9999
0 to 1000 V
Set the base voltage.
8888
95% of the power supply voltage
9999
Same as the power supply voltage
47
G011
Second V/F (base
frequency)
9999
0 to 590 Hz
Set the base frequency at the RT signal ON.
9999
Second V/F disabled
113
G021
Third V/F (base
frequency)
9999
0 to 590 Hz
Set the base frequency at the X9 signal ON.
9999
Third V/F disabled
V/F
V/F
V/F
Pr.19
Output frequency
(Hz)
Pr.3
Pr.47
Output voltage (V)
Pr.113
Содержание 800 Series
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