A Cloud-Native Software Architecture of NAMUR Open Architecture Verification of Request using OPC UA PubSub Actions over MQTT
Sten Grüner, Anders Trosten · 2023
Long life cycles of OT equipment used in process industry pose a burden to the adoption of high-paced Industry 4.0 IT applications. NAMUR Open Architecture (NOA) specifies a reference architecture to securely decouple the life cycle of IT and OT components, allowing both to evolve on the required pace. Verification of Request (VoR) and Security Gateway are two key concepts of NOA to allow controlled information traversal both ways between IT and OT domains. In this work we present a cloud-native software architecture of VoR by using a standardized OPC UA PubSub communication over MQTT. The architecture has been successfully validated on a simulated system using Kubernetes clusters and Virtual Machines hosting product-grade DCS and edge components.