LLM-Generated PLC Code: Safety, Verification and Guardrails
Using LLMs to generate IEC 61131-3 Structured Text for PLCs: verification gates, simulation, IEC 61508 constraints, and where it is unsafe. Reference pipeline.
CODESYS 4 vs CODESYS 3: What the 1.0 Web IDE Changes
CODESYS 4 1.0 ships a browser-based, Git-friendly PLC IDE on the same compiler and runtime. What changes vs CODESYS 3, what is missing, who should switch.
OpenPLC Runtime v4 vs v3: What Changed and How to Migrate (2026)
OpenPLC v3 is end-of-life. Compare v4 vs v3 architecture, REST/JWT API, plugins (Modbus, OPC UA, EtherCAT, S7), retain in v4.2 and a migration plan.
IEC 61499 vs IEC 61131-3: Distributed Control for Industry 4.0 (2026)
IEC 61499 vs IEC 61131-3 compared: event-driven function blocks vs scan-cycle PLC logic, portability, distribution, tooling, and a decision matrix for modern control.
CODESYS vs TwinCAT: Soft-PLC Architecture Compared (2026)
An engineer's 2026 comparison of CODESYS and TwinCAT soft-PLC runtimes: real-time determinism, fieldbus support, IEC 61131-3, EtherCAT, and a decision matrix.
PLC vs SCADA: Architecture, Roles, and How They Work Together (2026)
PLC vs SCADA explained — control loops vs supervisory, network architecture, IEC 61131-3 vs HMI runtime, with a decision matrix for greenfield plants.
OpenPLC v3 + Modbus TCP: Open-Source PLC Architecture
OpenPLC v3 reference architecture with Modbus TCP — runtime internals, IEC 61131-3 languages, hardware targets, and a production deployment pattern for open-source PLCs in 2026.