Function block diagrams (FBD) are a graphical programming language used in programmable logic controllers (PLCs) and other industrial automation systems. They represent a program as a network of interconnected function blocks, each performing a specific task such as logic operations, arithmetic calculations, or data manipulation. Data flows between blocks via connection lines, and the diagram visually represents the program's control flow and data processing. FBDs are commonly used for complex control algorithms, signal processing, and data acquisition tasks due to their intuitive and modular nature. They facilitate easier understanding, debugging, and maintenance of automation programs.
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