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From Code Generator to Engineering Companion: A Plant-Aware Agent for PLC Programming

Joschka Kersting, Gesa A. Benndorf · 2026 · IEEE International Conference on Emerging Technologies and Factory Automation (ETFA)

DOI: 10.1109/etfa68377.2026.11725227 · cited by 0 works (OpenAlex) · open-access PDF

Portuguese

A codificação do Controlador Lógico Programável (PLC) continua a ser uma tarefa manual, centrada no IDE, que exige a troca constante de contexto entre a documentação, arquivos de projeto e editores de código. O trabalho recente demonstrou que os modelos de grande linguagem aumentados pela recuperação podem gerar Texto Estruturado compatível com o fornecedor em altas taxas de compilação, mas esses sistemas tratam a geração de código como um único pipeline: o engenheiro submete uma consulta e recebe código, sem conhecimento persistente da planta específica. Nós apresentamos um copiloto de conversação consciente da planta que estende este paradigma em três direções: ingestão de contexto específico da planta, um modelo de interação chat-first para explicação e depuração, e uma escada de acesso graduado de chat para

Machine translation (Meta M2M100); the English original follows.

Abstract

Programmable Logic Controller (PLC) coding remains a manual, IDE-centric task that demands constant context switching between documentation, project files, and code editors. Recent work has demonstrated that retrieval-augmented large language models can generate vendor-compliant Structured Text at high compilation rates \cite{pred}, yet these systems treat code generation as a one-shot pipeline: the engineer submits a query and receives code, with no persistent knowledge of the specific plant. We present a plant-aware conversational copilot that extends this paradigm in three directions: plant-specific context ingestion, a chat-first interaction model for explanation and debugging, and a graduated tool-access ladder from chat to deployment. The system is designed for real plant infrastructure and keeps the engineer in control of each step that produces real-world effects.

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Topics: Computer science, Code (set theory), Programmable logic controller, Generator (circuit theory), Code generation, Programming language

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