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Code 18002: [Channel %1: ] Block %2 NCK protection zone %3 cannot be activated. Error code %4

Problembeschreibung & Sicherheitswarnung

Die Siemens SINUMERIK 840D CNC hat einen kritischen [Channel %1: ] Block %2 NCK protection zone %3 cannot be activated. Error code %4-Alarm ausgelöst. Sofortige Aufmerksamkeit durch einen qualifizierten Bediener oder Wartungstechniker ist erforderlich, um Folgeschäden an der Ausrüstung oder verdorbene Teile während des Fertigungszyklus zu vermeiden. Stellen Sie immer sicher, dass standardmäßige Sicherheits- und LOTO-Verfahren befolgt werden, bevor Sie auf Schaltschränke zugreifen.

Offizielle Schritte zur Fehlerbehebung

Parameters: %1 = Channel number %2 = Block number, label %3 = Number of NCK protection zone %4 = Error specification Definitions: An error has occurred on activating the protection zone. The error number gives the specific reason for the alarm. No.Meaning 1: Incomplete or conflicting contour definition. 2: Contour encompasses more than one surface area. 3: Tool-related protection zone is not convex. 4: If both boundaries are active in the 3rd dimens ion of the protection zone and both limits have the same value. 5: The number of the protection zone does not exist (negative number, zero or greater than the maximum number of protection zones). 6: Protection zone definition consists of more than 10 contour elements. 7: Tool-related protection zone is defined as insi de protection zone. 8: Incorrect parameter used. 9: Protection zone to be activated is not def ined or number of contour element <2 or >MAXNUM_CONTOURNO_PROTECTAREA. 10: Error in internal structure of the protection zones. 11: Other, not further specified errors. 12: The number of protection zones simultaneously active exceeds the maximum number (channelspecific machine data). 13,14: Contour element for protection zones cannot be created. 15,16: No more memory space for the protection zones. 17: No more memory space for the contour elements. Reaction: Correction block is reorganized. Interface signals are set. Alarm display. If the alarm is output on ramp-up (2nd parameter: "I NIT" instead of block number), "Channel not ready to operate" will be set. Diagnostics Manual (DAsl), 03/2009 Remedy: Please inform the authorized personnel/service department. 1. Reduce the number of simultaneously active protection zones (MD). 2. Modify part program: - Delete other protection zones. - Preprocessing stop. When the alarm occurs during control ramp-up, t he system variables $SN_PA_... have to be corrected for the specified protection zone. Afterwards perf orm a restart. If the erroneous data cannot be recognized, the protection zone's imm ediate activation can be removed, and the system variables of the protection zone can be written again by means of NPROTDEF. Program Continuation: Clear alarm with NC ST ART or RESET key and continue the program. If the alarm occurs during NC program execution, the current block can be changed. This way, the NPROT parameters can also be adjusted. However, if there is an error in the definition of the protection zone, the NC program must be aborted and the definition must be corrected under NPROTDEF. If the alarm occurs on control ramp-up, system va riables $SN_PA_... must be corrected for the specified protection zone. This can be done by downloading an Initial.ini file that includes the relevant corrected date. If afterwards a restart is performed again, the alarm will have been removed provided that the data are consistent.

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.

Über Siemens SINUMERIK 840D CNC Alarme

Industriesteuerungen von Siemens verfügen über umfangreiche Diagnosesysteme zum Schutz der internen Schaltkreise und mechanischen Verbindungen. Wenn eine SINUMERIK 840D CNC einen Fehlercode wie 18002 ausgibt, deutet dies typischerweise auf eine Diskrepanz zwischen befohlenen Werten und tatsächlichem Sensor-Feedback hin.

Vollständige Alarmliste: 4014 Siemens SINUMERIK 840D CNC codes.

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