Sequential Function Chart
Sequential Function Chart (SFC) is a graphical programming language used in industrial automation and control systems, particularly with Programmable Logic Controllers (PLCs). It models the sequential behavior of a system using steps, transitions, and actions to represent processes as a series of states and conditions. SFC is standardized in IEC 61131-3, making it a key part of PLC programming for complex, state-based control logic.
Developers should learn SFC when working on industrial automation projects, such as manufacturing lines, robotics, or process control systems, where clear visualization of sequential operations is critical. It is especially useful for designing and debugging state machines, as it simplifies complex logic into manageable steps and transitions, improving maintainability and reducing errors in safety-critical applications.