OPC UA FX (Field eXchange) is an extension of the OPC UA framework developed by the OPC Foundation's Field Level Communications (FLC) Initiative. Its goal is to standardize vendor-neutral, secure, and deterministic communication at the industrial field level — connecting controllers, field devices, sensors, and actuators seamlessly, from the shop floor all the way to the cloud. The first formal UAFX specifications were officially released in early 2024 after four years of development and extensive cross-vendor interoperability prototyping.
IOP Event at Beckhoff Berlin (Feb 2026)
The most significant recent event was the OPC UA FX Prototyping Interoperability (IOP) Event, held from February 16–19, 2026, hosted by Beckhoff Automation at its Berlin office. Leading automation and technology providers participated in the four-day session, which advanced interoperable, real-time industrial communication between controllers based on OPC UA FX. A key accomplishment was the verification of AML-based offline description exchange, confirming seamless engineering data exchange capabilities — a critical enabler for efficient device configuration and streamlined commissioning workflows. The group also defined next steps for TSN (Time-Sensitive Networking)-based real-time communication, aligning on technical milestones and integration strategies for deterministic, vendor-independent communication architectures.
New Specification Release: UAFX V1.00.04 RC
The OPC Foundation has completed Release Candidate V1.00.04 of the UAFX 1.00 series, introducing two new specification parts:
OPC 10000-81 (Part 81 – UAFX Connecting Devices and Information Model): Delivers functional enhancements including extensions to the ConnectionManager and ConnectionConfigurationSets, added GDS address support, more flexible referencing from ConnectionEndpoint to DataSet Readers and Writers, improved publishing interval configuration, and clarified requirements for Events and LogObject contents.
OPC 10000-84 (Part 84 – UAFX Profiles): Introduces new ConformanceUnits reflecting functionality added in Part 81 and refines Descriptor content ConformanceUnits.
This milestone further strengthens configuration flexibility, clarifies requirements, and expands conformance coverage across the UAFX ecosystem.
Upcoming Demonstrations & Calls for Participation
The OPC Foundation has issued two active Calls for Participation targeting OPCF members:
C2C (Controller-to-Controller) Engineering Workflow Demo: Invites control suppliers and system integrators to showcase a live, end-to-end C2C workflow using real PLC hardware. The demo will feature descriptor export/import, FunctionalEntity modeling, secure onboarding via Global Discovery Server (GDS), certificate provisioning, and role-based access control with encrypted/signed PubSub data exchange.
C2D (Controller-to-Device) Multi-Vendor Demo at SPS 2026: A major multi-vendor showcase planned for the SPS trade fair in Nuremberg, Germany, in November 2026, featuring motion devices, remote I/Os, field instruments, fieldbus gateways, UAFX controllers, and edge gateways working together.
Interested OPCF members can contact Peter Lutz, Director FLC, at peter.lutz@opcfoundation.org.
Hannover Fair 2026: OPC UA FX in the Spotlight
At the upcoming Hannover Fair, the OPC Foundation will hold a dedicated field conference titled "Open, Secure, Connected: OPC UA Shaping Process Automation". Special focus will be placed on OPC UA FX and O-PAS, including the strategic alignment between the OPC Foundation's FLC initiative and the Open Process Automation Forum (OPAF) — jointly driving interoperable, standards-based architectures for the process industries.
Market Momentum
From a commercial perspective, OPC UA FX is backed by substantial market momentum. The global OPC UA FX market surpassed USD 15.87 billion in 2025, is projected to reach USD 17.15 billion in 2026, and is forecast to climb to USD 37.4 billion by 2036 at a CAGR of 8.10%. Asia Pacific — particularly India (8.5% CAGR), China (8.2%), and South Korea (7.0%) — is the fastest-growing region, driven by smart manufacturing and semiconductor automation investments. Industry analysts now consider OPC UA FX certification a baseline procurement requirement for automation vendors competing in next-generation manufacturing projects.
Certification Outlook
The OPC Foundation's Compliance Corner (March 2026) highlights that certified OPC UA FX products are expected to begin appearing in 2026, marking the first wave of commercially certified UAFX implementations, as UAFX certification has now become mandatory within the broader OPC UA certification framework.
About the Author
Nay Linn Aung is a Senior Automation & Robotics Engineer (M.S. Computer Science — Data Science & AI) specializing in the convergence of OT and IT.