Fieldbus & networking
OPC UA
Platform-independent, security-capable data exchange standard used to pull robot status and production data into MES, SCADA, and analytics systems.
OPC UA defines an information model and a secure client-server transport that works over Ethernet without tying data exchange to any single PLC brand. Most modern robot controllers offer an OPC UA server option that publishes axis positions, alarms, and program status as structured nodes rather than raw registers.
Because the model is self-describing, an MES or historian can browse the robot's address space and subscribe to the tags it needs instead of relying on a fixed register map built by an integrator. This makes OPC UA a common bridge between the plant floor and IT-side systems.
OPC UA is generally used for monitoring and data collection rather than time-critical motion control, since its overhead is higher than a dedicated real-time fieldbus.
Common questions
- What does OPC UA do?
- Platform-independent, security-capable data exchange standard used to pull robot status and production data into MES, SCADA, and analytics systems.
- What does OPC UA work with?
- It works with MES integration, Ignition SCADA, SCADA link, Digital twin platforms.
- What should I watch for with OPC UA?
- Not suited for hard real-time motion or I/O exchange. Certificate-based security setup takes extra configuration. Server node structure varies by robot vendor implementation.