![]() ![]() Modbus is a standard that is open and is widely-used network protocol in the industrial manufacturing environment. To move Modbus into the 21st century, an open Modbus TCP/IP specification was developed in 1999. Modicon introduced the Modbus protocol to the market in 1979. Modbus RTU mode is the most common implementation, but Modbus TCP/IP is gaining ground and ready to surpass it. But the two used most are Modbus RTU (Remote Terminal Unit), serial (RS-232 or RS-485) protocol or Modbus (TCP/IP) Transmission Control Protocol and Internet Protocol. What’s the difference between the two? Although the two protocols are similar, cost and speed differentiate the two. It is used to establish master-slave/client-server communication between devices. Modbus Protocol is a messaging structure developed by Modicon.
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