ETIC 2230 Guia do Utilizador descarregar pdf (Página 53)

SET UP

XSRING+ SHDSL switch User’s guide ref 9018809-01 Page 53

17.1 Modbus gateway

The ETIC modbus gateway is made to link modbus devices connected to its serial interface to TCP

modbus devices connected to the ethernet TCP/IP network.

A TCP Modbus client device is a device connected to the ethernet TCP/IP network and able to send

a modbus request to a modbus TCP server which is in charge of answering; A TCP modbus client is

equivalent to a master.

A TCP Modbus server device is a device connected to the ethernet TCP/IP network and able to

answer to a modbus request received from a TCP modbus client device. A TCP modbus server is

equivalent to a slave.

A TCP modbus server can answer to any client of the Ethernet TCP/IP network.

The ETIC modbus gateway can be configured

either

to link serial slaves to several TCP modbus clients devices connected to the ethernet network; in that

case, select the modbus client gateway,

to connect a serial master to several TCP modbus servers devices connected to the ethernet network;

in that case, select the modbus server gateway.

17.1.1 Modbus server gateway

Modbus slaves devices are connected to the serial interface.

That gateway links asynchronous modbus slaves to modbus TCP clients connected to the ethernet

network.

Each TCP client (i.e. modbus master) can send requests to any modbus slave device of the serial

interface.

To configure the Modbus server gateway,

• select the modbus menu and then modbus server,

• enable the modbus server gateway and set the parameters as follows:

“Modbus protocol” parameter :

Select the RTU or ASCII option

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ETIC 2230 Guia do Utilizador Página 53