Figure 1 shows the UAFX communication stack architecture and how it relates to the layer model of OPC UA.

Figure 1 – OPC UA FX communication stack architecture

OPC UA FX extends the core OPC UA functionality for field-level communications. The foundation of the UAFX Information Model is the AutomationComponent. The AutomationComponent is an entity representing one or more Assets that may perform automation functions represented by FunctionalEntities. The AutomationComponent can also provide health status. See OPC 10000-81 for more details regarding the AutomationComponent model.

OPC UA FX also adds definitions for network services and component models for End Stations and Bridges. Profiles defining the selection of specific networking services supported by these component models are specified in OPC 10000-84.

UAFX supports the exchange of standard and safety process data simultaneously. See OPC 10000-15 for AutomationComponents that support safety.

Future Profiles will be developed for Motion, I/O, and types of process instruments. Specifications, including Information Models, developed for those types of products will build upon the AutomationComponent model.