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Factory automation relies on seamless communication between field instruments, controllers, and supervisory systems. In the past, proprietary protocols restricted data exchange across different control hardware manufacturers. Early computing methods like Dynamic Data Exchange (DDE) failed to meet process control demands across distributed network architectures. Consequently, industry leaders established Open Platform Communication (OPC) in 1996 to standardise industrial data exchange. OPC provides a universal interface that bridges legacy equipment with modern supervisory platforms.