Rockwell Automation joins an OPC Foundation initiative to extend the OPC UA protocol to field-level industrial communications. Under the initiative, a series of working groups are forming to bring the OPC UA protocol’s vendor-independent, end-to-end interoperability to field-level devices. The initiative plans to address use cases not currently in scope for EtherNet/IP. It could also simplify other use cases, especially in multi-vendor, controller-to-controller environments and for the vertical integration of field devices, according to the company.
As the primary author of the EtherNet/IP specifications, Rockwell Automation says it understands EtherNet/IP users may see compatibility risks in technology developed for a different ecosystem. The company reportedly intends to mitigate these risks through both its ongoing development of EtherNet/IP and its intentions for the OPC UA protocol.
Rockwell Automation’s priorities within the new OPC Foundation initiative include working to help ensure the following:
- OPC UA specifications are written with the same level of rigor and completeness as the EtherNet/IP specifications.
- Time-sensitive networking (TSN) is commonly applied across the OPC UA, EtherNet/IP and PROFINET protocols, so all three can coexist on a common TSN-based network.
- OPC UA pub/sub technology is implemented in a way that allows existing EtherNet/IP installations to support OPC UA devices.
- OPC UA hardware requirements allow the protocol to be deployed on hardware platforms that are common in today’s EtherNet/IP components.
- OPC UA software requirements allow the protocol to be deployed within current EtherNet/IP-centric software tools without significant changes to user workflows.
- Conformance test practices mandated for EtherNet/IP reflect the necessary requirements for OPC UA conformance testing.
“We are committed to these priorities to help make sure EtherNet/IP users have a choice of whether and when they migrate to the new OPC UA protocol,” says Paul Brooks, business development manager, Rockwell Automation. “We want users to determine the pace of this migration based on the value that they receive, rather than technology choices made in the specification. We trust that others engaged in the initiative will share this common goal.”
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