Fischer, JulianeVogel-Heuser, BirgitEstévez, ElisabetMale, Markus2024-10-302024-10-302020-05J. Fischer, B. Vogel-Heuser, E. E. Estévez and M. Male, "VarApp: Variant Management App for IEC 61131-3 Compliant Legacy Software," 2020 IEEE Conference on Industrial Cyberphysical Systems (ICPS), Tampere, Finland, 2020, pp. 269-276, doi: 10.1109/ICPS48405.2020.9274774.https://ieeexplore.ieee.org/document/9274774https://hdl.handle.net/10953/3321Despite its many drawbacks, clone & own is still frequently used for control software development in the domain of automated Production Systems (aPSs). However, this procedure leads to a high amount of so-called legacy software variants, which are usually unmanaged and, thus, difficult to maintain or reuse. To facilitate the reuse of existing software, this paper presents a model-based approach for documentation, configuration, and derivation of IEC 61131-3 compliant control software. Thereby, the required models are stored in a NoSQL database and represent the structure and the variability of the considered aPS from a functional viewpoint. A visualization of the variability in the style of a Software Product Line, which is commonly used in the informatics domain for the development of variant-rich systems, enables the user to configure a variant and the respective IEC 61131-3 compliant control software is generated automatically through model transformations. The developed concept is evaluated with a prototypically implemented web application and the control software variants of a laboratory demonstrator. Thereby, the web application supports the integration of variants from existing legacy software into the database model.engAtribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/variant managementcode configurationlegacy softwareIEC 61131-3model-based developmentplanned reusesoftware product lineinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/openAccess