Modbus
TLDR: Modbus, developed in 1979 by Modicon (now part of Schneider Electric), is a communication protocol designed for industrial automation systems. It allows devices such as programmable logic controllers (PLCs), sensors, and actuators to exchange data over serial lines or Ethernet networks.
Modbus is widely used in manufacturing, energy management, and building automation. Its simplicity and compatibility make it ideal for applications requiring reliable communication between industrial devices. The protocol supports both master-slave and client-server architectures, enhancing its versatility in different setups.
The Modbus protocol has several variants, including Modbus RTU (used for serial communication) and Modbus TCP (designed for Ethernet). These options enable Modbus to integrate seamlessly into legacy and modern systems alike, ensuring compatibility across various industrial environments.
Modbus facilitates the exchange of data such as temperature, pressure, and flow rates, making it essential for monitoring and control systems. Collected information is often transmitted to cloud databases or local databases for further analysis and record-keeping.
Security features have been added to modern Modbus implementations to address vulnerabilities in industrial networks. Modbus Secure, for example, provides encryption and authentication options to protect critical communications in sensitive environments.
With its straightforward design and long-standing presence in industrial automation, Modbus remains a foundational protocol for real-time control and data exchange. Its continued relevance underscores its importance in industrial systems worldwide.
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