An OPC UA Model of the Skill Execution Interaction Protocol for the Active Asset Administration Shell

A skill-based engineering approach promises to increase changeability and flexibility in modern industrial automation systems. Skills can be modelled as finite state machines then exposed by means of OPC UA enabling their orchestration. concept the I4.0 language suggests peer-to-peer collaboration between components rather than a hierarchical ”use monitor” pattern skills. This paper focuses on integration these two approaches enable Cyber-Physical Production Modules use skills more cooperative manner. First, we describe existing skill models abilities abstract complex production processes. Then, concentrate modelling messages interaction for ”skill execution” semantic protocol well its representation an Asset Administration Shell. Finally, simple example show how may used components.