A DEGRADED SCHEDULING GENERATION OF A COMPONENT BASED APPLICATION

This paper deals with control applications designed using the component-based standard IEC 61499. In this standard, a function block is an event triggered component and an application is a function blocks network. Supposing end to end delays on applications behavior, the hard temporal validation of FBs networks may be not feasible. We propose to weaken these delays by tolerance constraints deduced from specifications. Exploiting the (m, k) model to specify these constraints, we propose a schedulability analysis generating a degraded scheduling to use by a sequencer at run-time.