feat: OpenPLC v4 tank simulation demo with OPC-UA#48
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Working Docker container with OpenPLC v4 runtime running an IEC 61131-3 Structured Text tank simulation with OPC-UA server. Verified end-to-end: - PLC compiles tank_demo.st (matiec -> C -> .so) at container startup - PLC runtime executes simulation (100ms cycle) - OPC-UA server exposes 5 variables (TankLevel, TankTemperature, TankPressure, PumpSpeed, ValvePosition) - Read values via OPC-UA client: TankLevel=500, Temp rises from 25C - Write PumpSpeed=50 via OPC-UA: TankLevel increases to 1000 (pump fills) - Anonymous read/write permissions for demo use Components: - tank_demo.st: IEC 61131-3 program with LOCATED vars (AT %MD/MX) - glueVars_tank.c: OpenPLC runtime glue with all required symbols - opcua_config.json: OPC-UA address space with 5 REAL variables - Dockerfile: multi-stage (matiec builder + OpenPLC runtime) Note: gateway/ Dockerfile and docker-compose.yml reference OPC-UA plugin which is not yet integrated. OpenPLC + OPC-UA standalone works.
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Summary
Docker-based OpenPLC v4 tank simulation with OPC-UA server for PLC diagnostics demo.
What works (verified)
Tank variables (OPC-UA)
Not yet integrated