IEC 61131–3: Programming Industrial Automation Systems

The programming of industrial controllers has developed into a fully-fledged engineering discipline in its own right over the last few years. It soon became apparent that the concepts and languages used in office automation were not equal to the task. "Rugged software" and fast adaptability are just two examples of the additional demands made by industrial automation technology. To standardise a variety of modern concepts and languages for the benefit of users, the International Electrotechnical