IEC 61131-3

IEC 61131-3 is an international standard for programmable logic controllers (PLCs), which are used in industrial automation. It defines a framework for software programming languages specifically suited for automation tasks, including five programming languages: ladder diagram, function block diagram, structured text, instruction list, and sequential function chart. This standard ensures consistency and interoperability among different manufacturers' PLCs, making it easier for engineers to develop, maintain, and share industrial control programs. Essentially, IEC 61131-3 helps streamline automation processes, enhancing efficiency and reliability in various industries.