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代码 25020: Axis %1 zero mark monitoring of active encoder

问题描述与安全警告

Siemens SINUMERIK 840D CNC 触发了严重的 Axis %1 zero mark monitoring of active encoder 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

Parameters: %1 = Axis name, spindle number Definitions: For PROFIdrive: The position encoder pulses between 2 zero mark pu lses are counted, and the plausibility is assessed (The functionality and possibly the par ameteritation of the plausibility check is done on the drive side. Please refer to the relevant drive documentation fo r details.), and reported in a PROFIdrive message frame (encoder interface) to the control, which then issues the present alarm. The alarm can be reprogrammed in MD11412 $MN_ALARM_REACTION_CHAN_NOREADY (channel not ready). Reaction: Mode group not ready. The NC switches to follow-up mode. Channel not ready. NC Start disable in this channel. Axes of this channel must be re-referenced. Interface signals are set. Alarm display. NC Stop on alarm. Channel not ready. Remedy: Please inform the authorized personnel/service department. The differences can result from transmission erro rs, disturbances, encoder har dware faults or from the evaluation electronics in the encoder used for position control. Th e actual value branch must therefore be checked: 1. Transmission path: Check the ac tual-value connectors for corr ect contacting, encoder cable for continuity, and also check for shor t-circuits and groundi ng (loose contact?). 2. Encoder pulses: Is the encoder power supply within the tolerance limits? 3. Evaluation electronics: Replace or rec onfigure the drive or encoder module used. Monitoring can be switched off by setting MD36310 $MA_ENC_ZERO_MONITORING [n] to 0 or 100 (n = encoder number: 1, 2). Program Continuation: Clear alarm with the RESET key in all channel s of this mode group. Restart part program.

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 25020 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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