Answer / Nivedita

Modbus, Profibus, and Fieldbus are communication protocols used for industrial automation and control systems. They allow devices to communicate with each other and share data in a standardized format. 1. Modbus: A simple and flexible protocol developed in the late 1970s by Modicon (now Schneider Electric) for transmitting data between programmable logic controllers (PLCs), sensors, actuators, and other industrial devices. Modbus uses a master-slave architecture with a single master device and multiple slave devices on a bus network. 2. Profibus: A high-performance, open, and vendor-neutral protocol for automation systems that was developed by the German automation industry. It offers various profiles, such as PA (Process Automation), FMS (Fieldbus for motion control), and I/O (Input/Output). 3. Fieldbus: A generic term referring to digital communication networks used in industrial automation applications. Fieldbus systems offer faster data rates, better diagnostics, and more flexibility compared to traditional wired or analog systems.

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