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App6-4 Appendix 6 Universal Serial Communications

System Composition

• 1 : 1 connection (one computer, one V series unit)

(For wiring, refer to page App6-6 to page App6-9.)

The system composition for a 1 : 1 connection is shown.

1) Can be used when the transmission distance via RS-232C is within 15 m, or the transmission

distance of RS-422 (485) is not greater than 500 m.

2) It is possible to use an interrupt when connecting a computer to a V series unit in a 1 : 1

connection. *

(Switch ON/OFF, ENT key of keypad, screen changing, macro OUT_ENQ)

* For RS-422 (485) 2-wire connection, interrupts cannot be used.

• 1 : n connection (one computer, multiple V series units)

(A maximum of 32 V series units can be connected. For wiring, refer to page App6-9.)

The system composition for a 1 : n connection is shown.

1) A station number specification is necessary to determine which V series will receive a

command when a computer and V series units are 1 : n connected.

2) Interrupt cannot be used when a computer and V series units are 1 : n connected.

* When V series units are 1 : n connected, it is convenient to use the TC485 (Terminal

Converter, optional). (For more information, refer to TC485 (Terminal Converter) Operation

Instructions.)

RS-232C

RS-422

RESET

disc

General-purpose computer

1 : 1 Connection

V series

RS-422

RESET

disc

General-purpose computer

1 : n Connection

V series V series V series

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Cable Electronics DVP14 Specifiche Pagina 273