9.2 Details of Function Codes
9-15
Chap. 9 FUNCTION CODES
F04 Base Frequency Refer to H50.
F05 Rated Voltage (at Base Frequency) Refer to H51.
These function codes set the base frequency and the voltage at the base frequency essentially
required for running the motor properly. If combined with the related function codes H50 and
H51, these function codes may set data needed to drive the motor along the non-linear V/f
pattern.
The following description includes setting-up required for the non-linear V/f pattern.
Base frequency (F04)㩷
Set the rated frequency printed on the nameplate located on the motor.
- Data setting range: 25.0 to 400.0 (Hz)
Rated voltage (at base frequency) (F05)㩷
Set 0 or the rated voltage printed on the nameplate labeled on the motor.
- If 0 is set, the rated voltage at base frequency is determined by the power source of the
inverter. The output voltage will vary in line with any variance in input voltage.
- If the data is set to anything other than 0, the inverter automatically keeps the output voltage
constant in line with the setting. When any of the automatic torque boost settings, automatic
energy saving or slip compensation is active, the voltage settings should be equal to the rating
of the motor.
If F05 is set to match the rated voltage of the motor, the motor efficiency will be
improved better than that it is set to 0. Therefore, when brakes are applied to the
motor, energy loss decreases and the motor regenerates larger braking energy,
which can easily activate the overvoltage protection function. Note that the
allowable power consumption capacity of the inverter for braking energy is limited
by the specifications. If the overvoltage protection function is activated, it may be
necessary to increase deceleration time or use an external braking resistor.
Data for F05 Function
0
Output voltage in line with variance in input voltage. (The AVR is disabled.
AVR: Automatic Voltage Regulator)
80 to 240 (V) Output AVR-controlled voltage for 230 V class motors.
160 to 500 (V) Output AVR-controlled voltage for 460 V class motors.
Non-linear V/f pattern for frequency (H50)
Sets the non-linear V/f pattern for frequency component.
- Data setting range: 0.0 to 400.0 Hz
(Setting 0.0 to H50 disables the non-linear V/f pattern operation.)
Non-linear V/f pattern for voltage (H51)
Sets the non-linear V/f pattern for voltage component.
Data for H51 Function
0 to 240 (V) Output the voltage AVR-controlled for 230 V class motors.
0 to 500 (V) Output the voltage AVR-controlled for 460 V class motors.
If the voltage at base frequency (F05) is set to 0, the data settings of function codes H50 and
H51 will be ignored.
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