Function Block Diagram
Function Block Diagram (FBD) is a graphical programming language used primarily in industrial automation and control systems, particularly with Programmable Logic Controllers (PLCs). It represents control logic as interconnected blocks, where each block performs a specific function (e.g., mathematical operations, logic gates, timers) and data flows through connections between them. This visual approach simplifies the design, debugging, and maintenance of complex control processes in manufacturing, robotics, and process industries.
Developers should learn FBD when working on industrial automation projects, such as factory automation, building management systems, or process control in sectors like oil and gas, where PLCs are standard. It is essential because it provides an intuitive, standardized way to implement control logic that aligns with IEC 61131-3 standards, making it easier for engineers to collaborate and maintain systems over time. Use cases include designing sequential control, implementing safety interlocks, and handling analog signal processing in real-time environments.