Modular Implementation of Discrete Event Systems as Sequential Function Charts Applied to an Assembly Cell

• Modular implementation of discrete event models in Programmable Logic Controllers (PLCs) using Sequential Function Charts (SFCs) is investigated. Synchronisation of such models, typically finite state automata of Petri nets, is not well defined in the synchronous PLC-world. We develop an algorithm that computes event monitors for synchronising concurrently executing SFCs. The methodology is applied to an assembly cell.

Ämnesord

NATURVETENSKAP  -- Data- och informationsvetenskap (hsv//swe)

NATURAL SCIENCES  -- Computer and Information Sciences (hsv//eng)

Nyckelord

discrete event systems

Sequential Function Charts

supervisory control theory

flexible manufacturing systems

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