Toshiba VF-nC1 instruction manual Selecting control mode, XN Base frequency 1 Hz

E6581090

5.8Base frequency

XN : Base frequency 1 (Hz)

• Function

Sets the base frequency in conformance with load specifications or the motor's rated frequency.

Note: This is an important parameter that determines the constant torque control area.

Base frequency voltage

H

Output voltage [V]

0

* A voltage higher than the voltage set with H is applied to the motor at a frequency higher than the base frequency set with XN, even if the H parameter is

set at a voltage lower than the 5 input voltage.

XN Output frequency (Hz)

■Parameter setting

Title	Function	Adjustment range	Default setting
XN	Base frequency 1 (Hz)	25～200 (Hz)	*

When operating the inverter with RV selected, change the setting of H to the value printed on the rating plate, in addition to the setting of XN.

*The value is changed according to the set-up parameter condition. (VFNC1 (S)-□□□□P□-W type)

60 [Hz] for VFNC1 (S)-□□□□P□type.

5.9Selecting control mode

RV : V/F control mode selection

XD : Torque boost 1 (%)

H : Slip frequency gain

• 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 H parameter (slip correction gain).

■Parameter setting

Title	Function	Adjustment range	Default setting
RV	V/F control mode	0 (1,2): V/F constant	0
	selection	3: Sensorless vector control

Follow the steps below to set the RV parameter.

(Example: Setting the V/F control mode selection parameter (RV) to 3 (Vector control))

Key operated	LED display	Operation
		Displays the operation frequency (operation stopped).
		(When standard monitor display selection H= is set
		to 0 [operation frequency]).
ENT	CWJ	The first basic parameter "History (CWJ)" is displayed.

▲Switch to the control mode selection parameter (RV) by

RV pressing the △ key.

ENT		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.

ENT	⇔RV	Press the ENTER key to save the new setting. RV and the
		parameter setting “3” are displayed alternately.
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