代碼 4503: [TO unit %1: ] H number %2 assigned more than once. H number linked again.
問題描述與安全警告
Siemens SINUMERIK 840D CNC 觸發了嚴重的 [TO unit %1: ] H number %2 assigned more than once. H number linked again. 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
Parameters: %1 = TO unit %2 = H number Definitions: This error can only occur when MD10880 $MN_MM_EXTERN_CNC_SYSTEM= 1 or 2. The Power ON effective MD10890, $MN_EXTER N_TOOLPROG_MODE, bit 3 has been reset. On reconstructing data handling after Power ON, it has been found that different edges of the same TO unit have the same H number. They had been linked previ ously. They are linked again and MD10890 $MN_EXTERN_TOOLPROG_MODE, bit 3 is set again. Reaction: Alarm display. Remedy: H numbers must be assigned only onc e in a TO unit. Then, MD10890, $MN_EXTERN_TOOLPROG_MODE, bit 3 can be set = 0 and a restart can be performed. Program Continuation: Clear alarm with the Delete key or NC START.
Source: SINUMERIK 840D sl / 840Di sl / SINAMICS S120 Diagnostics Manual (DAsl, 03/2009)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
關於 Siemens SINUMERIK 840D CNC 警報
由 Siemens 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 SINUMERIK 840D CNC 出現類似 4503 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: 4014 Siemens SINUMERIK 840D CNC 代碼s.
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