代碼 U01---: No user PLC
問題描述與安全警告
Mitsubishi M800/M80 CNC 觸發了嚴重的 No user PLC 警報。需要由合格的操作員或維修技師立即處理，以防止在製造週期中對設備造成二次損壞或導致零件報廢。在接觸電氣控制箱之前，請務必確保遵循標準安全和停機掛牌 (LOTO) 程序。
官方故障排除步驟
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.
關於 Mitsubishi M800/M80 CNC 警報
由 Mitsubishi 製造的工業控制器具有廣泛的診斷系統，用於保護內部電路和機械連桿。當 M800/M80 CNC 出現類似 U01--- 的錯誤代碼時，通常表示指令值與實際感測器回饋之間存在不匹配。
完整警報清單: 722 Mitsubishi M800/M80 CNC 代碼s.
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