Manual

15.RS-485 COMMUNICATION INTERFACE(OPTION)

15. RS-485 COMMUNICATION INTERFACE(OPTION)

15-1. Communication Specifications

- Specifications

Signal level Based on RS-485

Transmitting distance Approx 1km

Transmitting method Asynchronous󲃙Full duplex

Transmitting speed 1200󲃙2400󲃙4800󲃙9600 or 19200bps Selectable

Bit configuration Start 1bit

Character length 7 or 8bits Selectable

Stop 1 or 2bits Selectable

Parity None,Odd or Even Selectable

Terminator CR+LF/CR Selectable

Code ASCII

- Connector Pin Assignment

15-2. RS-485 connection

1.Connection of transmitting and receiving lines

4-wire connection

Set the communications mode of the F371 to “4-wire.”

Connect the “SD” (sending side) of the equipment on the other end (master), such as a

programmable controller, to “RD” (receiving side) of the F371 (slave), and “RD” of the

master to “SD” of the F371.

MARK󲃕OFF󲃖

VA-VB < -0.2V

SPACE󲃕ON󲃖

VA-VB > 0.2V

A 󲃚

B 󲃘

A 󲃚

B 󲃘