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Modelling and PLC-b...
Modelling and PLC-based Implementation of Modular Supervisory Control
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- Hellgren, Anders, 1970 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Lennartson, Bengt, 1956 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Fabian, Martin, 1960 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- 2002
- 2002
- Engelska.
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Ingår i: Proceedings of the 6th Workshop on Discrete Event Systems, Zaragoza, Spain, OCT 02-04, 2002. ; , s. 371-376
- Relaterad länk:
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https://research.cha...
Abstract
Ämnesord
Stäng
- Implementation of supervisory control in Programmable Logic Controllers (PLCs) typically requires that the underlying discrete event models of plant, specification as well as the supervisor itself fulfil a number of properties. These properties are discussed and methods for solving related problems are given. In particular, determinism and synchronisation issues are investigated.In a manufacturing system, for instance, there are typically a set of processes using a set of shared resources. Uncareful modelling may cause the system model to become nondeterministic. This can be circumvented by relabelling the relevant models. For industrial-sized models, though, this must be done automatically, something that we achieve by parameterising the models.Given a deterministic model, consisting of several interacting entities, we discuss its PLC-based implementation. In addition to the synchronisation of plant and supervisor, a modular supervisor must be internally synchronised. However, synchronisation of the submodules is not well defined in the PLC-world. This may be achieved by using event monitors and an immediate transit/immediate action execution model.
Ämnesord
- NATURVETENSKAP -- Data- och informationsvetenskap (hsv//swe)
- NATURAL SCIENCES -- Computer and Information Sciences (hsv//eng)
Publikations- och innehållstyp
- kon (ämneskategori)
- ref (ämneskategori)