Specification of FMS real-time control based on Petri nets withobjects and process failure monitoring

摘要

This paper presents an approach for control and monitoring ofdiscrete events systems. We show how it is possible to preserve theadvantages of a hierarchical control structure for process monitoringpurposes. The limitations of the monitoring system induced by the toolsclassically used for the specification of the control sequences areexposed. A new approach of knowledge representation is proposed: adatabase model is associated to the hierarchical control and monitoringstructure. In this context, the main monitoring functions become morepowerful and are able to treat most of the erroneous situationsfollowing from a process failure