You have a SCADA system on an Ethernet network speaking Modbus TCP/IP. You also have dozens of field devices — energy meters, VFDs, PLCs, temperature controllers — connected via RS-485 speaking Modbus RTU. They cannot talk to each other directly. Modbus RTU uses serial communication with CRC-16 error checking. Modbus TCP uses Ethernet with a TCP/IP stack and… Read More »
Modbus is one of the most widely used communication protocols in industrial automation and control systems. Originally designed for serial networks, Modbus evolved to work seamlessly over Ethernet and IP networks, creating two common variants — Modbus RTU and Modbus TCP/IP. Although both use the same core data model and function codes, they differ in frame structure, transmission… Read More »
Welcome to this article dedicated to the Modbus protocol. In this comprehensive guide, we will explore in detail this widely used protocol in the field of industrial automation. Whether you are a student or an engineer, this introduction will provide you with the necessary basics to understand and implement the Modbus protocol. The Modbus protocol is an open… Read More »