Fact Sheet: Open Platform Communication Unified Architecture (OPC UA)

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Short description/
Transmitted information

OPC UA is a platform-independent standard through which various kinds of systems and devices can communicate by sending request and response Messages between Clients and Servers or NetworkMessages between Publishers and Subscribers over various types of networks. It supports robust, secure communication that assures the identity of OPC UA Applications and resists attacks.

Normative document


Version / Release state
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Release date
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Application scope

OPC UA is applicable to components in all industrial domains, such as industrial sensors and actuators, control systems, Manufacturing Execution Systems and Enterprise Resource Planning Systems, including the Industrial Internet of Things (IIoT), Machine To Machine (M2M). These systems are intended to exchange information and to use command and control for industrial processes


OPC UA provides a consistent, integrated AddressSpace and service model. This allows a single Server to integrate data, Alarms and Events, and history into its AddressSpace, and to provide access to them using an integrated set of Services. These Services also include an integrated security model.

Promoting bodies
  • OPC Foundation, Inc.
  • Interoperability Standard
IT Standard classification
  • IEC 62541
Data format
  • XML / text , UA / Binary , JSON
Additional available resources
Relevant prostep ivip project groups
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Positioning of OPC UA in V-Model


OPC UA defines a common infrastructure model to facilitate information exchange. OPC UA specifies the following:

  • The information model to represent structure, behaviour and semantics.
  • The message model to interact between applications.
  • The communication model to transfer the data between end-points.
  • The conformance model to guarantee interoperability between systems.

As illustrated OPC UA is not targeted at just the SCADA, PLC and DCS interface, but also as a way to provide greater interoperability between higher level functions. Batch OPC UA Manufacturing, Production and Maintenance i,iiOPC.

Relevance and Benefit for MBSE

Beside of application in industrial automation, OPC UA can be applied in engineering i.e. in laboratory and validation scenarios, HiL, data acquisition, but also as part of digital twin scenarios by feeding back information from operation back to engineering use cases.

Risks and Impediments

not known