4-111
When setting the frequency related parameters for a custom V/F curve values make sure that:
F
max
> F
base
> F
mid2
＞
F
mid1
>F
min
(01-02) (01-12) (01-04) (01-06) (01-08)
The ‘SE03’ V/F curve tuning error is displayed when the frequency values are set incorrectly.
When 01-04 and 01-05 (or 01-18 and 01-19) are set to 0, the inverter ignores the set values of Fmin2 and Vmin2.
The voltage values for 01-02~01-09 are
irrelevant.
The value for maximum output voltage of motor 1(01-03) and the value for base output voltage of
motor 1(01-13) will depend on restore factory setting(13-08) to set the value of voltage.
When the control mode is changed parameter 00-00, 01-08 (F
min
) and 01-09 (V
min
) will automatically be changed
to the default setting of the selected control mode.
SLV or SV Mode (Sensorless Vector or Sensor Vector Control)
Enter the motor data in parameter group 17 for SV and SLV control mode (00-00) and perform auto-tuning.
In the SV and SLV mode the V/F curve normally does not have to be re-adjusted after a successful auto-tune.
The maximum output frequency setting 01-02 (Fmax), base frequency 01-12 (Fbase), minimum output frequency
01-08 (Fmin), maximum output voltage 01-03 (Vmax) or base output voltage 01-13 (Vbase) can be adjusted but
the voltage is automatically adjusted by the internal current controller.
Set the base frequency (01-12, Fbase) to the motor rated frequency on the motor nameplate.
Perform the auto-tuning procedure after adjusting parameters 02-19 or 17-04 to reduce the voltage at no-load
operation.
Motor jitter can be reduced by lowering the no-load voltage. Please note that lowering the no-load voltage
increases the current at no-load.
* The setting of V/F curve in SLV2 is the same as that in VF mode.
