代码 109002: No switchover: Target PLC used, try again
问题描述与安全警告
Siemens SINUMERIK 840D CNC 触发了严重的 No switchover: Target PLC used, try again 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
Definitions: HMI would like to go online to this NCU. HMI has called the target PLC and is waiting for an acknowledgement. The HMI does not receive an acknowledgement bec ause the HMI parameter interface in DB19 is occupied by another HMI. Remedy: Repeat the operation at a later point in time, as the HMI parameter interface in DB19 is only temporarily occupied.
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.
关于 Siemens SINUMERIK 840D CNC 警报
由 Siemens 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 SINUMERIK 840D CNC 出现类似 109002 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: 4014 Siemens SINUMERIK 840D CNC 代码s.
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