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Chapter 1
Introduction
This chapter provides an overview of the
features and capabilities.
ongratulations on the purchase of your new EtherSeries
Modbus Ethernet Gateway. Interfaces include one
10/100BaseT ethernet interface and two RS-232/422/485 serial9-
pin interfaces.
The gateway allows serial MODBUS RTUs to communicate and
interoperate with MODBUS/TCP based controllers. The
MODBUS standard protocol is an asynchronous protocol
designed to connect directly to computer asynchronous ports.
MODBUS has been extended to operate over Ethernet using the
IP protocol suite. This gateway converts between the
MODBUS TCP/IP protocol and MOBUS ASIII/RTU protocols
transparently.
Normal operation would consist of one or more Ethernet based
computers functioning as Modbus Master and one or more
MODBUS slave devices (usually RTUs) connected serially to
the gateway.
By using RS-485, multiple MODBUS slave devices may be
connected to each of the two serial ports on the EMB-02. If
using RS-232, one MODBUS slave device may be connected to
each serial port.
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