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
software supports Modbus and Modbus/TCP protocol ?
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.winsite.com/bin/Info?3088
ActiveX
freeware to communicate with equipments via Modbus (RTU/ASCII) or Modbus/TCP
http://www.pmcrae.freeserve.co.uk/readregu.html
Example C
code for Linux Modbus/RTU communication
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