Discrete event control system design using automation Petri nets and their ladder diagram implementation
Küçük Resim Yok
Tarih
1998
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
SPRINGER LONDON LTD
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
As automated manufacturing systems become more complex, the need for an effective design tool to produce both high-level discrete event control systems (DECS) and low-level implementations becomes more important. Petri nets represent the most effective method for both the design and implementation of DECSs. In this paper automation Petri nets (APN) are introduced to provide a new method for the design and implementation of DECSs. The APN is particularly well suited to multiproduct systems and provides a more effective solution than Grafcet in this context. Since ordinary Petri nets do not deal with sensors and actuators of DECSs, the Petri net concepts are extended, by including actions and sensor readings as formal structures within the APN. Moreover enabling and inhibitor nrcs, which can enable or disable transitions through the use of leading-edge, falling-edge and level of markings, are also introduced. Tn this paper the methodology is explained by considering a fundamental APN structure. The conversion of APNs into the IEC1131-3 ladder diagrams (LD) for implementation on a PLC is also explained by using the token passing logic (TPL) concept Finally, an illustrative example of how APNs can be applied to a discrete manufacturing problem is described in detail.
Açıklama
Anahtar Kelimeler
automated manufacturing systems, discrete event control systems, IEC1131-3 standard, Petri nets, programmable logic controllers, real-time implementation
Kaynak
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
WoS Q Değeri
Q2
Scopus Q Değeri
Q1
Cilt
14
Sayı
10
