Abstract
In a fault tolerant framework, in order to obtain safe production systems, it is necessary to know, at each time and under a given configuration, the set of authorised and reachable states. This is the role of the Modes Management function. Another role is to manage the commutation states that are not planned by the current control. In this paper, a modelling approach is proposed in view of the modes management for safe production systems. Two used models are described. The Model of Function allows knowing the state of a function. The Model of Component allows knowing the state of a resource. Finally, the existing interactions between these two models are presented.
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