代码 U01---: No user PLC
问题描述与安全警告
Mitsubishi M800/M80 CNC 触发了严重的 No user PLC 警报。需要由合格的操作员或维修技师立即处理，以防止在制造周期中对设备造成二次损坏或导致零件报废。在接触电气控制箱之前，请务必确保遵循标准安全和停机挂牌 (LOTO) 程序。
官方故障排除步骤
Details No sequence program is included in the built-in ROM or temporary memory area. (1) Sequence program is not stored in the built-in ROM. (2) Sequence program is not written from the GX Developer/GX Works2 or internal PLC edit function. (3) Sequence program cannot be read due to broken built-in ROM. (4) No large capacity PLC additional specifications. Remedy (1) Write the sequence program from the GX Developer/GX Works2 or internal PLC edit function, and then ex- ecute the built-in ROM writing. (2) Check the presence of additional specification "Large PLC capacity" and reconsider the storable size. (3) If (1) or (2) does not solve the problem, there is a possibili ty that built-in ROM is broken.
Source: Mitsubishi M800/M80/E80 Series Alarm/Parameter Manual (IB-1501279)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
关于 Mitsubishi M800/M80 CNC 警报
由 Mitsubishi 制造的工业控制器具有广泛的诊断系统，用于保护内部电路和机械连杆。当 M800/M80 CNC 出现类似 U01--- 的错误代码时，通常表示指令值与实际传感器反馈之间存在不匹配。
完整报警清单: 722 Mitsubishi M800/M80 CNC 代码s.
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