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E6581090
E-7
5
5.8 Base frequency
: Base frequency 1 (Hz)
Note: This is an important parameter that determines the constant torque control area.
Output voltage [V]
Base frequency
voltage
Output frequency (Hz)
0
■Parameter setting
Title Function Adjustment range Default setting
Base frequency 1 (Hz)
25～200 (Hz)
*
When operating the inverter with = selected, change the setting of to the value printed
on the rating plate, in addition to the setting of .
* The value is changed according to the set-up parameter condition.
(VFNC1 (S)-□□□□P□-W type)
60 [Hz] for VFNC1 (S)-□□□□P□ type.
5.9 Selecting control mode
: V/F control mode selection
: Torque boost 1 (%)
: Slip frequency gain
■Parameter setting
Title Function Adjustment range Default setting
V/F control mode
selection
0 (1,2): V/F constant
3: Sensorless vector control
0
Follow the steps below to set the pt parameter.
(Example: Setting the V/F control mode selection parameter () to 3 (Vector control))
Key operated LED display Operation
Displays the operation frequency (operation stopped).
(When standard monitor display selection = is set
to 0 [operation frequency]).
The first basic parameter "History ()" is displayed.
Switch to the control mode selection parameter () by
pressing the △ key.
Press the ENTER key to display the parameter setting.
(Default setting: 0 (V/F))
Change the setting to 3 (Vector control) by pressing the △
key.
⇔
Press the ENTER key to save the new setting. and the
parameter setting “3” are displayed alternately.
• Function
Sets the base frequency in conformance with load specifications or the motor's rated frequency.
• Function
With VF-nC1, the V/F controls shown below can be selected.
x V/F constant
x Vector control
* When torque is not produced enough at low speeds, adjust the rotational speed
using the torque boost parameter. To correct the slip frequency, use the
parameter (slip correction gain).
▲
ENT
▲
ENT
ENT
* A voltage higher than the voltage
set with is applied to the
motor at a frequency higher than
the base frequency set with vl,
even if the parameter is
set at a voltage lower than the
input voltage.