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Other courses include robotics, automation, electrical motor controls, programmable logic controllers, and computer-aided design. [3] When performing their duties, PLC technicians must comply with federal, jurisdictional, industrial, and site-specific standards, codes, and regulations.
A programmable logic controller (PLC) or programmable controller is an industrial computer that has been ruggedized and adapted for the control of manufacturing processes, such as assembly lines, machines, robotic devices, or any activity that requires high reliability, ease of programming, and process fault diagnosis.
Sequential function chart (SFC) is a visual programming language used for programmable logic controllers (PLCs). It is one of the five languages defined by IEC 61131-3 standard. The SFC standard is defined as Preparation of function charts for control systems, and was based on GRAFCET (itself based on binary Petri nets [1] [2]).
In recent years, Simpson has continued his work in simulation and control systems and in 2006, launched the online PLC Technician program, which was based on his book, Programmable Logic Controllers. The program is now the largest of its kind in the world and provides training to employees in over 100 companies. [16]
Ladder logic is widely used to program PLCs, where sequential control of a process or manufacturing operation is required. Ladder logic is useful for simple but critical control systems or for reworking old hardwired relay circuits. As programmable logic controllers became more sophisticated it has also been used in very complex automation systems.
Function Block Diagram is one of five languages for logic or control configuration [2] supported by standard IEC 61131-3 for a control system such as a programmable logic controller (PLC) or a Distributed Control System (DCS). The other supported languages are ladder logic, sequential function chart, structured text, and instruction list.