PLC 程序设计（需求 → IO → 模块 → SCL → 验收）

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@indiv-tiaforge/plc-program-design

按工程顺序设计 PLC 程序（以博途 SCL 为例，IEC 61131 通用）：需求与动作矩阵、IO 点位表与地址规划、按设备/工艺/调度三层拆分模块与接口、SCL 状态机实现、编译与仿真验收。当用户说"给我做个 PLC 程序""这条线怎么写""帮我设计 IO 表""程序怎么拆块""AI 写的 PLC 代码怎么验收"时使用。可独立使用：落进真实博途工程时才需要 TiaLink 网关，不装博途也能用云仿真跑完用例。 In English — PLC programming by design, five stages, each gated — requirement and action matrix, IO point list and address plan, module/interface decomposition (device / process / scheduling layers), SCL state-machine implementation, and a four-gate acceptance chain (compile, interface consistency, simulation cases, change-impact regression). Use when asked to design a PLC program, draft an IO list, decide how to split blocks, or verify AI-written PLC code.