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4.12.7
Modbus/TCP (CLI mode only)
The Modbus is the most popular industrial protocol being
used today. Modbus is a
“master-slave” architecture, where
the
“master” sends polling request with address and data it
wants to one of multiple
“slaves”. The slave device that is
addressed responds to master. The master is often a PC,
PLC, DCS or RTU
… The salves are often the field devices.
Some of them are
“hybrid”.
There are three most common Modbus versions, Modbus
ASCII, Modbus RTU and Modbus/TCP. Ethernet based
device, Industrial Ethernet Switch for example, supports
Modbus/TCP that it can be polled through Ethernet. Thus
the Modbus/TCP master can read or write the Modbus
registers provided by the Industrial Ethernet Switch.
Korenix JetNet 5428G implements the Modbus/TCP
registers into the latest firmware. The registers include the
System information, firmware information, IP address,
interfaces
’ status, port information, SFP information,
inbound/outbound packet information.
With the supported registers, users can read the
information through their own Modbus/TCP based
progress/ display/ monitor applications and monitor the
status of the switch easily.
There is no Web UI for Modbus/TCP configuration. The Modbus/TCP configuration can be
changed through CLI.
Modbus/TCP Register Table
Word
Address
Data Type
Description
System Information
0x0000
16 words
Vender Name = “Korenix”
Word 0 Hi byte = ‘K’
Word 0 Lo byte = ‘o’
Word 1 Hi byte = ‘r’
Word 1 Lo byte = ‘e’
Word 2 Hi byte = ‘n’
Word 2 Lo byte = ‘I’
Word 2 Hi byte = ‘x’
Word 2 Lo byte = ‘\0’
(other words = 0)
0x0010
16 words
Product Name = "JetNet5428GV2-AC"
Word 0 Hi byte = ‘J’
Word 0 Lo byte = ‘e’
