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

問題描述與安全警告

Siemens SINUMERIK 840D CNC 觸發了嚴重的 Axis %1 zero mark monitoring of active encoder 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 = 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.

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 25020 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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