User`s guide

Configuration
XSLAN shdsl switch User’s guide ref 9014709-01 Page 33
4.7 IP<>RS gateway menu
That menu allows to configure the IP to asynchronous RS232-RS485 gateway
included in the XSLAN.
4.7.1 Modbus menu
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.
4.7.1.1 Definitions
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.
4.7.1.2 ETIC modbus gateway capabilities
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,
or
to connect a serial master to several TCP modbus servers devices
connected to the ethernet network; in that case, select the modbus server
gateway.