Abstract
A new fast and reliable way of writing programs for PLCs is the state diagram programming method. This method enables both sequential and non-sequential processes to be described in a graphical form. Automation tasks are broken down into function units, of which the states and their coordination are described graphically by state diagrams. Each state diagram has only one active state, but can exchange information with other diagrams for coordination purposes. The result is a set of interlinked state “automatons”. Grouping, for example by machine subassemblies, gives the automation task a clear structure.
The subject of applying the state diagram concept to PLC programming was also dealt with by a working committee of the VDW (Association of German Machine Tool Manufacturers) to increase the efficiency of PLC programming. On the basis of these results a programming tool executable under Windows 95 has been developed which enables state diagrams to be used for programming PLCs right through from the draft stage to testing, documentation and diagnostics.
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© 1996 Springer Science+Business Media Dordrecht
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Otto, HP., Rath, G. (1996). State Diagrams A New Programming Method for Programmable Logic Controllers. In: Storr, A., Jarvis, D. (eds) Software Engineering for Manufacturing Systems. IFIP — The International Federation for Information Processing. Springer, Boston, MA. https://doi.org/10.1007/978-0-387-35060-8_3
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DOI: https://doi.org/10.1007/978-0-387-35060-8_3
Publisher Name: Springer, Boston, MA
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