Toshiba Simple operation of the VF-A7 1 Speed control mode, Example of typical connection

3.2 Simple operation of the VF-A7 [1] [Speed control mode]

A speed control mode can be selected from among three: control panel operation, terminal board operation and combination of both. (Refer to 5.3 for other modes of operation.)

[Terminal operation] : Operation by means of external signals

[Panel operation] :Operation by means of keys on the control panel

[Panel + terminal operation] : Frequency, start and stop signals can be sent individually from the control panel and the terminal board.

3.2.1Operation from the terminal(external signals)

Terminal operation

■Start/Stop

Operation command mode selection ＝[Default setting]

Ｆ	and	ＣＣ	closed : Forward run	★To make the motor coast to a stop (coast
				stop),described on the left, break the
				connection between ST and CC when the
Ｆ	and	ＣＣ	open : Slowdown stop	motor is out of operation. Then,  is
				displayed on the LED display of the
				inverter rotating speed,

(When terminals	ＳＴ	and	ＣＣ	are electrically					Coast stop
connected.）								Motor
					Slowdown stop			speed
Frequency
								F-CC	ON
Terminal F-CC					ON				OFF
					OFF			ST-CC	ON
					ON
Terminal ST-CC									OFF
					OFF
■Example of typical connection
	MCCB							Motor
Power			R/L1			U/T1		IM
			S/L2			V/T2
supply			T/L3			W/T3
						F		Forward run if ON
								Deceleration stop if OFF
						R		Reverse run if ON,
								Slowdown stop if OFF
					Control panel	ST		Stand-by if ON,
								free-run stop if OFF
			G/E			CC
				CC	RX VI RR PP	I I		Current signal：4～20mAdc
								Voltage signal：-10～+10Vdc
								Voltage signal：0～10Vdc
				External potentiometer			(or	voltage signal RR-CC: 0	to 10V)

C-3