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Modelling of Exception Handling in Manufacturing Cell Control and its Application to PLC Programming.

Hasegawa, M.; Takata, M.; Temmyo, T.; Matsuka, H.

In: Proceedings of the IEEE International Conference on Robotics and Automation, 1990, Cincinnati, OH, USA; Vol. 1, pages 514-519. Los Alamitos, CA, USA: IEEE Comput. Soc. Press, 1990.

Abstract: A model based on a Petri net (PN) is proposed for controlling flexible manufacturing systems. The model can describe not only normal sequential processes but also interruptive exceptional handling processes by means of simple structures. A layered structure and two types of tokens are introduced into a PN to describe exception handling and error recovery. An application in which this model was used to program a programmable logic controller is described. The description of cell control can be simplified by the model.

Keywords: exception handling (in) manufacturing cell control; programmable logic controller programming; flexible manufacturing system; layered structure; error recovery.

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