About this document

Modbus Protocol Overview and Specifications by Nguyễn Duy Khôi is a document available to read on EtoBox.

The document discusses Modbus, including its history, physical layers, and strengths and weaknesses. It was created in 1979 by Modicon to allow PLCs to communicate with programming tools. Today it is used for master/client communications between intelligent devices. It can operate over RS232, RS485 and other media. The document describes the Modbus serial link and its use of master/slave access. It also discusses Modbus Plus, Ethernet TCP/IP, and the RS485 physical layer specifications. The link layer uses

Author

Nguyễn Duy Khôi

Language

EN