Overview
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Read the articleAUTHORS
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Daniel DUPONT: Doctor of Automation - Lecturer and researcher at the École supérieure des techniques industrielles et des textiles (ESTIT)
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David DUBOIS: Doctorate in automatic control and industrial computing - Lecturer at ESTIT
INTRODUCTION
In order to implement the GRAFCET technology on different media (wired or programmed), a three-stage design is recommended:
functional analysis, leading to the creation of a GRAFCET that is independent of the technological implementation;
the transcription of the GRAFCET into logical equations that can be used in the technological realization ;
the implementation of logic equations on the wired or programmed implementation medium.
This approach highlights the difficulties of functional design for complex applications, and proposes a solution through decomposition into less complex modules and dialogues between the GRAFCETs describing them.
As the functional part only takes into account the normal operating mode, the notion of on/off modes is integrated into the logic equations, and thus into the technological realization.
This article complements other articles on GRAFCET, including Outil de description des automatismes séquentiels : le GRAFCET [R 7 250].
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Technological implementation of GRAFCET
Bibliography
Works
Websites
AFCET GRAFCET group
http://www.gsip.cran.u-nancy.fr/GRAFCET/groupe/groupe_old.html
EEA Club GRAFCET group
http://japura.lurpa.ens-cachan.fr/grafcet/generalites/groupe_fr.html
...Standards
- Schematics, diagrams, tables – GRAFCET function diagram for describing control logic systems - NF C03-190 - 9-1995
- Documentation and graphic symbols – Functional diagrams for control systems – GRAFCET" function diagram – Extensions of basic concepts - UTE C03-191 - 6-1993
- Établissement de diagrammes fonctionnels pour systèmes de commande - IEC 60848 - 12-1988
- Langage de spécification GRAFCET pour diagrammes...
Organizations
WADAF
French Association for Economic and Technical Cybernetics (AFCET)
Manufacturers, constructors
non-exhaustive list
Merlin Gérin, Télémécanique
Siemens
Omron
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