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What is Modbus?

Introduction to Modbus Protocol

No documentation or manuals for this item.

Features

What is Modbus/nModbus?

What is Modbus protocol ?

Modbus is a communication protocol developed by MODICON Inc. in 1979. It's a standard, truly open and the most widely used network communication protocol in industrial automation field. SCADA and HMI software can easily integrate serial devices together via Modbus protocol.

What is Modbus/TCP protocol ?

Modbus/TCP protocol is a variant of Modbus protocol. It was developed in 1999 to allow Internet community access Ethernet devices.

What is nModbus ?

nModbus is a C# 3.0 implementation of the Modbus protocol. It is developed and maintained on a voluntary basis and provided free of charge.
ICP DAS verified and improved the DLL based on the official released NModbus_net-2.0_1.11.0.0-source.zip.
Programmers can use the DLL released by ICP DAS to develop a Modbus application for regular Windows based PCs or WinCE based devices. The DLL features

Modbus/RTU Master/Slave
Modbus/ASCII Master/Slave
Modbus/TCP Master/Slave
Modbus/UDP Master/Slave

Download the DLL and Demos

WinForm: Ver. 1.12.0.0 [2010/08/24]
- DLL and Documents: nModbusPC.dll, log4net.dll
- Demos
WinCE: Ver. 1.12.0.0 [2010/08/24]
- DLL and Documents: nModbusCE.dll, CABC.dll, FC19.dll
- Demos

What software supports Modbus and Modbus/TCP protocol ?

Most of SCADA ( Supervisor Control And Data Acquisition ) and HMI software support Modbus. For example: Citect, ICONICS, iFIX, InduSoft, Intouch, Entivity Studio, Entivity Live, Entivity VLC, Trace Mode, Wizcon, Wonderware... etc

What are the benefits of using Modbus and Modbus/TCP protocol ?

1. Openness, no license fees.
2. Widely supported by SCADA and HMI software
3. Easy to use
4. Easily integrate variant devices
5. Low development cost
6. Widely knowledge resource

Modbus Resource ?

http://www.modicon.com
Web page of original Modbus protocol inventor, MODICON Inc.

http://www.modbus.org
A community for Modbus users of Modbus users

http://www.modbustools.com
ActiveX component and test tools to communicate with equipments via Modbus (RTU/ASCII) or Modbus/TCP

http://ftp.icpdas.com/pub/cd/8000cd/napdos/modbus/modbus_master_tool/
http://ftp.icpdas.com/pub/cd/winpac/napdos/wp-8x4x_ce50/system_disk/tools/modbus_master_tool/
ICP DAS provides a test tool of Modbus connection.

Specifications

No information available.

References and Support

No documentation or manuals for this item.

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