Toshiba VF-A7 Motor is out of operation. If the monitor display momde, Execution by pressing key

[Setting procedure]

Key operated	LED display	Operation
		The running frequency is displayed. (Make this setting when
		the motor is out of operation.) (If the monitor display momde
		setting parameter  is set at [Running frequency])
MON		Press the Monitor key to call up the first basic parameter
		(automatic acceleration/deceleration).
▼		Select the parameter (extended parameters of 
		to ) by pressing △or▽ key.
ENT		Press the Enter key to activate the parameter .
ENT		Press the Enter key to display the parameter setting.
▲		Change the parameter setting to  (Automatic tuning
		execution) by pressing △ key.
ENT	⇔	Press the Enter key to save the change. Then,  and
		the set value are displayed alternately.

☆Cautions in setting the auto-tuning parameter

①Connect the motor before auto-tuning. Do not proceed to auto-tuning before the motor comes to a full stop. If the auto-tuning function is activated immediately after stopping motor, it sometimes fails to work normally because of a residual voltage.

②A voltage is applied to the motor during auto-tuning, though it is too low to rotate the motor.

③ Usually, auto-tuning terminates in some dozens of seconds. If an error occurs, however, the inverter trips (display ) and no motor constant is set.

④The auto-tuning is incapable of tuning special motors, such as high-speed or a high slip motors. When using such a motor, set motor constants manually as described in Section 3.

⑤If auto-tuning causes the inverter to trip easily because of an over-voltage  or an over- current , change the setting of the load inertia moment parameter . Refer to the

Step 2 for the adjustment of .

⑥When the inverter is used for a crane/hoist, equip it with a protective device (mechanical brake, etc.) with a sufficient capacity. Failure to do so might cause the crane/hoist to loose speed and fall because the motor cannot produce sufficiently large torque during auto-tuning.

⑦When operating a motor in vector control mode, set the carrier frequency at 2.2 kHz or over. Failure to do so might cause the vector control to be unstable.

⑧If auto-tuning cannot be made successfully or an auto-tuning error () occurs, set the motor constants manually as described in Selection 3 below.

★Notes about vector control: Refer to 5.10 9)

[Selection 3: Individually setting the vector control and the manual tuning]

If a tuning error  occurs during auto tuning or the sensorless vector control charact eristic needs to be improved, you may set motor constants individually.

Title	Function	Adjustment range	Default setting
	Number of motor poles	,,,,,,,	
	Rated capacity of motor	～[Model dependent] [kW]	Model dependent
		: Toshiba standard motor #1 (*1)
		: Toshiba VF motor
	Motor type	: Toshiba V3 motor	
		: Toshiba standard motor #2 (*1)
		: Other motors

(*1) Toshiba standard motor 1: World-energy series of totally-enclosed fan-cooled motors Toshiba standard motor 2: World-energy 21 series of totally-enclosed fan-cooled motors

F-36