Content on this page requires a newer version of Adobe Flash Player.

Get Adobe Flash player


Modbus/TCP is the Ethernet manifestation of the venerable Modbus protocol. Modbus/TCP utilizes standard Ethernet and Internet protocols, allowing for a wide range of choices for cabling media and network equipment, as well as for simple integration of Modbus/TCP with company enterprise networks. Modbus/TCP can be used as a high speed factory network backbone, or directly with intelligent devices.

Modbus/TCP is supported by hundreds of manufacturers worldwide, including Schneider Electric and Allen-Bradley. It is maintained by the Modbus Organization. Modbus/TCP has recently been incorporated by the ODVA into the EtherNet/IP protocol. This allows intelligent controller and field devices to utilize the strengths of both protocols in the same hardware.

Since Modbus/TCP uses the same message structure as Modbus/RTU, gateways between a Modbus/TCP controller and multiple Modbus/RTU devices allows for aggregating field I/O onto a single Ethernet cable, reducing wiring costs and improving reliability.

The Modbus Organization has developed a standard conformance test for Modbus/TCP devices, and issues a "passed" checkmark for all devices which conform to the standard.

What Can AB Tech Solution Do for Your Modbus/TCP Product Development?
  • Develop a fully-compliant product for you
  • Add Modbus/TCP capability to your existing product
  • Enhance the features and functionality of your product
  • Perform required interoperability testing
  • Obtain the Modbus Organization compliance certification for your products