OPC UA security: a practical model for certificates, users, and trust
A field guide to OPC UA application identity, encrypted channels, user authentication, trust lists, and the operational work that keeps them healthy.
OPC UA
OPC UA: information modeling, client/server, PubSub, and companion specs.
Learning paths & worksheets: Industrial data connectivity: from register to consumer · Industrial data contract template
OPC UA, MQTT, and Sparkplug B: how they fit together
Three technologies that get compared as rivals but usually work as layers. What each one owns, and how to stop choosing between them.
OPC UA companion specifications: a guided tour
The base standard models anything; companion specs model your industry. How to find, read, and actually use them.
Edge gateway patterns for brownfield connectivity
Protocol conversion, buffering, and context at the edge — the four gateway patterns that connect legacy equipment to modern platforms.
OPC Unified Architecture (OPC UA) — technology overview
The OPC Foundation's overview of the OPC UA architecture: platform-independent, service-oriented, with built-in security and extensible information modeling.
PLCopen: motion, safety, and IEC 61131-3 libraries
PLCopen: IEC 61131-3 motion control libraries, safety, OPC UA function blocks, and coding guidelines.
Kepware industrial connectivity (Velotic)
Kepware (now part of Velotic): industrial connectivity software exposing hundreds of device protocols via OPC UA, MQTT, and more.
Terms in this topic
- Companion specification
- Domain-specific OPC UA object model (machinery, robotics, instruments…).
- Industrial data contract
- An owned agreement about a signal’s identity, datatype, units, timestamps, quality and consumer behavior.
- Information model
- OPC UA's structured, browsable description of assets.
- Kepware
- Multi-protocol connectivity server, now part of Velotic.
- OPC UA
- Industrial interoperability framework: modeling, PubSub, security.
- OPC UA FX
- OPC UA field-level communication and controller interoperability.
- OPC UA PubSub
- OPC UA's scalable publish/subscribe communication model.
- OPCTurkey
- Kepware's official distributor and OPC services in Türkiye.
- Source timestamp
- The time associated with sampling or producing a value at its source.
Related topics
Industrial IoT / IIoT · MQTT · Edge Computing · Industrial Networking · Factory Software · Motion Control