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Auflistung nach Schlagwort "opc ua"

1 - 3 von 3
  • Textdokument
    Feature-based Comparison of Open Source OPC-UA Implementations
    (INFORMATIK 2020, 2021) Mühlbauer, Nikolas; Kirdan, Erkin; Pahl, Marc-Oliver; Waedt, Karl
    OPC UA is an industry-standard architecture for automation, process controlling and monitoring. It is a detailed and complex machine-to-machine communication protocol which makes it challenging to implement. The complexity of the protocol leads to heterogeneity among implementations. Today, there are several open-source implementations without a compliance certificate accredited by the OPC Foundation. Certified implementations undergo various tests to fulfil interoperability. Every implementation fits different use-cases and requirements as each of them comes with its own features. In this paper, we make a feature-based comparison of the most common open-source OPC UA implementations. We investigate their support for the essential features and functionalities. Furthermore, we evaluate their interoperability. Overall, our study shows that open-source implementations have good coverage of features and functionalities, especially open62541 and UA-.NETStandard. Furthermore, our tests show that they do not have any significant interoperability issue.
  • Konferenzbeitrag
    Optimizing OPC UA Deployments on Node.js through Advanced Logging Techniques
    (INFORMATIK 2023 - Designing Futures: Zukünfte gestalten, 2023) Kirdan, Erkan; Schindler, Josef; Waedt, Karl
    This paper explores the value and benefits of implementing advanced logging techniques within OPC UA deployments in Node.js. OPC UA is a leading protocol for interoperable and secure data exchange in industrial automation and IoT, among other complex data communication systems. Adopting sophisticated logging strategies can optimize its deployments on Node.js. The paper uses a case study to demonstrate the real-world impact of integrating robust logging solutions into OPC UA deployments. It underscores how such practices can improve system reliability, increase debugging efficiency, enhance security, and understand system performance. This valuable insight aids developers and system administrators in managing and maintaining complex OPC UA deployments, reinforcing the critical role of a well- implemented logging strategy. By analyzing a specific instance of an OPC UA server-client pair implemented in Node.js, the paper invites a broader discussion around the optimization strategies that could further strengthen the robustness and security of OPC UA systems. It aims to open avenues for more research, encouraging a continuous drive towards more efficient and secure industrial automation and data communication systems.
  • Textdokument
    Securing javascript runtime of OPC UA deployments
    (INFORMATIK 2022, 2022) Schindler,Josef; Belaidi,Siwar; Kirdan,Erkin; Waedt,Karl
    OPC UA is a commonly used machine-to-machine communication protocol. As it is used in industrial critical infrastructure, its security is vital. OPC UA has several proprietary and open-source implementations in different programming languages. Among them, a JavaScript implementation node-opcua stands out due to advantages such as ease of use, code maturity etc. JavaScript is a just-in-time compiled programming language that is executed by a runtime system. Node.js is the most common runtime environment to run JavaScript programs. Deno is it a potential and unofficial successor as it is developed by the original author of Node.js. One promised improvement of Deno is the focus on higher security, such as having a restricted file system and network access by default. Since (1) not all libraries have been adopted yet for for Deno, since (2) this new runtime comes with a compatibility mode featured first in version v1.15, since (3) there is very few research literature yet and since (4) there is no current dedicated OPC UA implementation for Deno so far, we present and evaluate measures to overcome errors when running node-opcua on Deno in this paper.