Chapter 1 Modbus Tcp To Rtu/Ascii Gateway Application; Overview - Korenix JetBox 8100 User Manual

Chapter 1 Modbus TCP to RTU/ASCII
Gateway Application

1.1 Overview

Modbus is one of the most popular industrial protocols in the world. It is
supported by the traditional RS-232/422/485 devices and recently by the
Ethernet devices. Lots of industrial devices, such as PLCs, DCSs, HMIs,
instruments, and meters, use Modbus as their communication standard.
A Modbus TCP to RTU/ASCII gateway application is designed as a bridge
for the Modbus TCP (Ethernet) masters and Modbus RTU/ASCII (serial)
slaves. It allows the Ethernet-based HMIs or PLCs to control devices over
RS-232/422/485 without additional programming or effort.
Figure 1-1 shows the block diagrams of Modbus TCP to RTU/ASCII
gateway application.
Modbus
TCP
Master
(HMI or
PLC)
Figure 1-1 Block Diagrams of Modbus TCP to RTU/ASCII Gateway Application
JetBox 8100 User Manual_Modbus_1.0-r1.doc

Chapter 1 Modbus TCP to RTU/ASCII Gateway Application

JetBox 8100/8210/8220
ModbusT2R.exe
Modbus Modbus
TCP RTU/
Slave ASCII
Master
Modbus
RTU/
ASCII
Slave
(PLC,
DCS)
1