Interoperability across industrial automation systems is a cornerstone of Industry 4.0. To address this need, the OPC Unified Architecture (OPC UA) Publish-Subscribe (PubSub) model offers a promising mechanism for enabling efficient communication among heterogeneous devices. PubSub facilitates resource sharing and communication configuration between devices, but it lacks clear guidelines for mapping diverse industrial traffic types to appropriate PubSub configurations. This gap can lead to misconfigurations that degrade network performance and compromise real-time requirements. This paper proposes a set of guidelines for mapping industrial traffic types, based on their timing and quality-of-service specifications, to OPC UA PubSub configurations. The goal is to ensure predictable communication and support real-time performance in industrial networks. The proposed guidelines are evaluated through an industrial use case that demonstrates the impact of incorrect configuration on latency and throughput. The results underline the importance of traffic-aware PubSub configuration for achieving interoperability in Industry 4.0 systems.

翻译：工业自动化系统间的互操作性是工业4.0的基石。为满足这一需求，OPC统一架构发布订阅模型为实现异构设备间的高效通信提供了一种前景广阔的机制。发布订阅机制促进了设备间的资源共享与通信配置，但缺乏将多样化工业流量类型映射到相应发布订阅配置的明确指导原则。这一缺失可能导致配置失当，进而降低网络性能并损害实时性要求。本文提出了一套基于时序和服务质量规范的工业流量类型与OPC UA发布订阅配置的映射准则，旨在确保工业网络中通信的可预测性并支持实时性能。通过一个展示错误配置对延迟与吞吐量影响的工业用例，对所提准则进行了评估。结果凸显了流量感知的发布订阅配置对于实现工业4.0系统互操作性的重要意义。