Communication Protocol OPC UA Open Platform Communication Unified Architecture

Exchange of Information between Machines Industrial Standard OPC UA Compared with all other OPC specifications, OPC UA differs remarkably due to its capability to not just transport data, but also to describe machine-readable data in a meaningful way. OPC UA ( Unified Architecture) is an industrial standard issued by the OPC Foundation and is released as IEC standard 62541. Individual Specications of the Manufacturer Specializations for information models of other organizations OPC Information Model (data access, alarms, events …) Basic services Special implementation Modeling rules (Transport,...

Coming from basic rules for allocation of information (OPC Meta Model) and basic methods for data exchange (Build-In Information Models) it is possible to create any advanced information model for a dedicated special user case. Such pre-defined data types can be specified within “OPC Companion Specification”. Similar to object-oriented programming languages, additional data types can be created from existing data. More complex data types, like object files can be modeled with variables, methods and events. These kinds of data can be used to build further types with a hierarchical structure. The...

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