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Código 20004: [Channel %1: ] Axis %2 reference mark missing

Descripción del problema y advertencia de seguridad

El Siemens SINUMERIK 840D CNC ha desencadenado una alarma crítica [Channel %1: ] Axis %2 reference mark missing. Se requiere la atención inmediata de un operador calificado o técnico de mantenimiento para evitar daños secundarios al equipo o piezas estropeadas durante el ciclo de fabricación. Asegúrese siempre de seguir los procedimientos de seguridad estándar y LOTO antes de acceder a los armarios eléctricos.

Pasos oficiales de solución de problemas

Parameters: %1 = Channel number %2 = Axis name, spindle number Definitions: In the distance-coded length measurement system, 2 reference marks were not found within the defined searching distance (axis-specif ic MD34060 $MA_REFP_MAX_MARKER_DIST). A reduction cam is not required for distance-coded sc ales (but an existing cam will be evaluated). The conventional direction key determi nes the direction of search. The searching distance MD34060 $MA_REFP_MAX_MAR KER_DIST, within which the two reference marks are expected is counted commencing at the start point. Reaction: NC Start disable in this channel. Interface signals are set. Alarm display. NC Stop on alarm. Remedy: Please inform the authorized personnel/service department. Determine the distance between 2 odd reference point markers (reference point marker interval). This value (which is 20.00 mm on Heidenhain scales) must be entered in the MD34060 $MA_REFP_MAX_MARKER_DIST. Check the reference point track of the scal e including the electronics for the evaluation. Program Continuation: Clear alarm with the RESET key. 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.

Acerca de las alarmas de Siemens SINUMERIK 840D CNC

Los controladores industriales construidos por Siemens están diseñados con amplios sistemas de diagnóstico para proteger los circuitos internos y los enlaces mecánicos. Cuando un SINUMERIK 840D CNC arroja un código de error como 20004, generalmente indica un desajuste entre los valores ordenados y la retroalimentación real del sensor.

Lista completa de alarmas: 4014 Siemens SINUMERIK 840D CNC códigos.

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