The Concept of Postponed Event in Timed Discrete Event Systems and Its PLC Implementation

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dc.authorid0000-0001-9625-5523
dc.contributor.authorGelen, Gokhan
dc.contributor.authorUzam, Murat
dc.contributor.authorDalci, Recep
dc.date.accessioned2019-08-01T13:38:39Z
dc.date.available2019-08-01T13:38:39Z
dc.date.issued2010
dc.departmentNiğde ÖHÜ
dc.descriptionIEEE International Conference on Systems, Man and Cybernetics -- OCT 10-13, 2010 -- Istanbul, TURKEY
dc.description.abstractSupervisory Control Theory (SCT) is one of the most important frameworks for establishing formal discrete event control systems. Despite some difficulties, the programmable logic controller (PLC) implementation of supervisory controllers obtained from SCT for untimed systems is well established within the literature. However, there is no general and easy to use method for obtaining supervisory controllers with time delay functions. In order to address this need, in this paper the concept of postponed event is proposed for introducing the time delay functions within untimed automata. Postponed event pe is defined as the shifted version of an event e on the time axis by a deterministic time delay value. Postponed event is a general, easy to use and practical method for PLC implementation of supervisory controllers with time delay functions. Supervisory controllers can be obtained as in untimed systems by using SCT framework with the assumption that postponed events are taken into account as if they are normal (untimed) events. Then they are refined at the implementation stage by the assignment of time delay values to respective events. The implementation of postponed events can be realized by using on delay timers, off delay timers or pulse timers of PLCs. The applicability of the proposed method is demonstrated by means of an example.
dc.description.sponsorshipIEEE
dc.identifier.isbn978-1-4244-6588-0
dc.identifier.issn1062-922X
dc.identifier.urihttps://hdl.handle.net/11480/4947
dc.identifier.wosWOS:000295015302053
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.institutionauthor[0-Belirlenecek]
dc.language.isoen
dc.publisherIEEE
dc.relation.ispartofIEEE INTERNATIONAL CONFERENCE ON SYSTEMS, MAN AND CYBERNETICS (SMC 2010)
dc.relation.ispartofseriesIEEE International Conference on Systems Man and Cybernetics Conference Proceedings
dc.relation.publicationcategoryKonferans Öğesi - Uluslararası - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectSupervisory Control Theory
dc.subjectDiscrete Event Systems
dc.subjectRW Supervisor
dc.subjectLadder Logic Diagram
dc.subjectTime Delays
dc.titleThe Concept of Postponed Event in Timed Discrete Event Systems and Its PLC Implementation
dc.typeConference Object

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