OPC UA Part 1 - Overview and Concepts 1.02 Specification(14)

OPC UA Specification Part1 OverView and Concepts

OPC Unified Architecture, Part 1 6 Release 1.02 4 Structure of the OPC UA series

4.1 Specification Organization

This specification is organized as a multi-part specification, as illustrated in Figure 1.

Figure 1 – OPC UA Specification Organization

The first seven parts specify the core capabilities of OPC UA. These core capabilities define the structure of the OPC AddressSpace and the Services that operate on it. Parts 8 through 11 apply these core capabilities to specific types of access previously addre ssed by separate OPC COM specifications, such as Data Access (DA), Alarms and Events (A&E) and Historical Data Access (HDA). Part 12 describes Discovery mechanisms for OPC UA and Part 13 describes ways of aggregating data.

Readers are encouraged to read Parts 1 through 5 of the core specifications before reading Parts 8 through 13. For example, a reader interested in UA Data Access should read Parts 1 through 5 and 8. References in Part 8 may direct the reader to other parts of this specification.

4.2 Core Specification Parts

Part 1 – Overview and Concepts

Part 1 (this Part) presents the concepts and overview of OPC UA.

Part 2 – Security Model

Part 2 describes the model for securing interactions between OPC UA Clients and OPC UA Servers. Part 3 – Address Space Model

Part 3 describes the contents and structure of the Server’s AddressSpace.

Part 4 – Services