Toshiba VF-AS1 instruction manual Inverter Input terminal Programmable controller, Com

! E6581301!

3) Connection with transistor output

￿ Inverter

Input terminal

CC

Programmable controller

!The inverter can be controlled by connecting the input terminal with output (contactless switch) of a programmable controller. Use this function to specify forward/reverse run or a preset speed operation. Use a transistor that operates on 24Vdc, 5mA power.

* Interface between programmable controller and inverter

When using an open-collector output type programmable control device to control the operation of a motor, connect cables, as shown in the schematic diagram for sink/source logic (when an external power supply is used) on page B-15. When using the internal power supply of the inverter, connect cables, as shown in the schematic diagram on page B-14. If the programmable control device is turned off with the inverter left on, an incorrect signal will flow into the inverter, as shown in the figure below, because there is a potential difference between the control power supplies. Be sure to provide an interlock so that the programmable controller cannot be turned off when the inverter is on.

￿	Programmable controller			Inverter
			+24V
Fuse blowout		External +24V
	P24	power supply
detector circuit			Input terminal
				Inverter internal	7
			(F, R, ST….)
				+24V power
	COM			supply
	Fuse

■Example of use- three-wire operation (SW1 set to sink logic)

The three-wire operation function allows you to make the inverter self-hold its operation, without setting up a sequential circuit, so that the inverter can be operated by means of external signals (reset contact signals).

￿

F

R

S3

CC

Forward run	Forward run (F): If you press the Forward (F) button, the
	motor rotates in the forward direction at the
	frequency specified with a command.
Reverse run	Reverse run (R): If you press the Reverse (R) button, the
	motor rotates in the reverse direction at the
HD	frequency specified with a command.
	HD (S3): If you press the HD (S3) button, the motor
	decelerates and comes to a stop.

[Parameter setting]

Terminal	Title	Function	Adjustment range	Example of setting
symbol
S3	￿￿￿￿￿	Input terminal function	￿"￿￿￿	￿￿￿
		selection 7(S3)		( HD operation retention)

G-3