Toshiba VF-S9 automatic torque boost and V/F control mode selection, auto-tuning is set to 2. ⇒

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Key operated	LED display		Operation
		Press the	key to change the parameter to 1 (sensorless vector
		control + auto-tuning).
		Press the ENTER key to save the changed parameter.		and
		the parameter are alternately displayed.

Note 1: Setting V/F control selection to (sensorless vector control) provides the same characteristics as

when	(auto-tuning) is set to 2. ⇒	See 5.12
Note 2: Setting	to automatically programs	to .

If vector control cannot be programmed....

First read the precautions about vector control in 5.12, 6.

1)	If the desired torque cannot be obtained, see 6.13, 3.
2)	If auto-tuning error "	" appears, see 6.13, 3.

■ (automatic torque boost) and (V/F control mode selection)

	Automatic torque boost is the parameter for setting V/F control mode selection (						) and auto-
	tuning (	) together. That is why all parameters related to				change automatically when
5	is changed.
					Automatically programmed parameters
				Check the programmed value of		.
	Displays	after resetting	- (If		is not changed, it becomes 0		-
				(V/F constant) )
	Sensorless vector control			Sensorless vector control			Executed
	+ auto-tuning						( after execution)

2) Increasing torque manually (V/F constant control)

The VF-S9 inverter is set to this control mode by factory default.

This is the setting of constant torque characteristics that are suited for such things as conveyors. It can also be used to manually increase starting torque.

If V/F constant control is programmed after changing ,

Set V/F control mode selection to 0 (V/F constant)

		⇒	See 5.12.
Note 1:	If you want to increase torque further, raise the setting value of manual torque boost .
	How to set manual torque boost parameter	⇒	See 5.13.
Note 2:	V/F control selection to 1 (variable torque) is an effective setting for the load on such
	equipment as fans and pumps.	⇒	See 5.12.

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