On the implementation of task-based supervisory controllers

This paper presents a new approach for the implementation of task-based supervisory controllers. Based on a general framework allowing the reduction of controller models, the presented methodology provides an efficient implementation of discrete-event controllers on Programmable Logic Controllers. Considering the bottlenecks of the platform, propositions are made for the reduction of resource need of the generated code by modularity and hierarchy as well as for ensuring determinism. Presented methods can be directly used for automated generation of executable code for controller devices. Results are illustrated on a simple example.