539
5. PARAMETERS
5.13 (G) Control parameters
3
4
5
5
5
6
7
8
9
10
5.13.2 Base frequency, voltage
Use this function to adjust the inverter outputs (voltage, frequency) to match with the motor rating.
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)
• To change the base frequency when using single inverter switching between multiple motors, use Pr.47 Second V/F (base
frequency).
• Pr.47 will become enabled when the RT signal turns ON.
NOTE
• The RT signal acts as the second function selection signal and makes the other second functions valid. (Refer to page
348.)
• 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).
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
Pr.19
Output frequency
(Hz)
Pr.3
Pr.47
Output voltage (V)
To Next Page
Loading...
Need help?
General
