Full Papers:

• Virendra Ashiwal, Alois Zoitl: Messaging Interaction  Patterns for a Service Bus Concept of PLC-Software. PDF , opens a fileIn this paper, we identified patterns for interactions between software components in a PLC-Service bus environment. The patterns are inspired by the enterprise domain and are demonstrated based on a running example (VDMA demonstrator). The concept was previously published , opens an external URL in a new windowin ETFA2020.
• Bianca Wiesmayr, Alois Zoitl, Antonio Garmendía, Manuel Wimmer: A Model-based Execution Framework for Interpreting Control Software. PDF, opens a file This work discusses the execution semantics of IEC 61499 Basic FBs in detail. An interpreter was implemented to allow executing models directly, instead of generating code for a runtime first. This approach facilitates unit testing, thus, we present its integration with Service Sequences.
• Bianca Wiesmayr, Oscar Miguel-Escrig, Alois Zoitl, Julio-Ariel Romero-Pérez: Distributed implementation of hierarchical GRAFCETs through IEC 61499. PDF, opens a file This paper is an extension of our successful paper at last year's ETFA, opens an external URL in a new window, handling the distributed implementation of GRAFCETs , opens an external URL in a new windowin general. Now, we extended our approach to also cover hierarchical features of GRAFCETs such as Forcing and Enclosings, while retaining the hierarchical structure.
• Lisa Sonnleithner, Bianca Wiesmayr, Virendra Ashiwal, Alois Zoitl: IEC 61499 Distributed Design Patterns. PDF, opens a file Building on previous work, opens an external URL in a new window, this paper illustrates how to realize fully distributed IEC 61499 applications without any orchestrating blocks. We show that our design provides improved understandability and adaptability, while maintaining a slim library with highly reusable Function Block types.

Work-in-progress papers:

• Michael Oberlehner, Lisa Sonnleithner, Bianca Wiesmayr, Alois Zoitl: Catalog of Refactoring Operations for IEC 61499. PDF, opens a file This paper evaluates existing refactoring technologies from software engineering and maps them to IEC 61499. These approaches will facilitate maintaining large-scale IEC 61499 applications.
• Hafiyyan Sayyid Fadhillah, Bianca Wiesmayr, Michael Oberlehner, Rick Rabiser, Alois Zoitl: Towards Delta-Oriented Variability Modeling for IEC 61499. PDF , opens a fileWe present our idea for variability modeling in IEC 61499 using so-called delta models. This approach helps establishing systematic, strategic reuse of software for high-variability production systems.
• Lisa Sonnleithner, Sandor Bacsi, Michael Oberlehner, Elene Kutsia, Alois Zoitl: Do you smell it too? Towards Bad Smells in IEC 61499 Applications. PDF , opens a file

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