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231-A006

SPLC-CC%2: Cross comparison failed, output %4

Heidenhain · TNC CNC Controllers

¿Qué significa 231-A006 ?

This error indicates a failure in the cross-comparison of SPLC-CC outputs. It occurs when the Safety PLC (SPLC) program of the CC[x] defines an output as 0 (LOW), but the value read from the terminal for that output is 1 (HIGH), suggesting a discrepancy between commanded and actual output states.

Causas comunes

  • Error in the cross comparison of the SPLC-CC outputs.
  • SPLC program of the CC[x] defines the output as LOW (0), but the terminal value is HIGH (1).
  • Incorrect wiring of the output, potentially causing it to be pulled HIGH.
  • SPLC program logic issue where output signals do not remain stable for at least 2 SPLC cycles.

Pasos de reparación & Lista de verificación

Haga clic en los pasos para seguir su progreso.

  1. 1

    Check the physical wiring of the faulty output (indicated by %4) for any short circuits, external voltage sources, or incorrect connections.

  2. 2

    Review the SPLC program logic for the affected output to ensure signals for setting and resetting the output remain stable for a minimum of 2 SPLC cycles.

  3. 3

    Verify the output module's functionality and its ability to correctly switch between LOW and HIGH states.

  4. 4

    Measure the voltage at the output terminal to confirm the actual state when commanded LOW and HIGH by the SPLC.

Ver todos los códigos en este manual (47)
Datos técnicos verificados. Última actualización: March 2026

Fallas relacionadas

Fuente: Heidenhain TNC CNC Controllers
Heidenhain 231-A006 — Cómo resolver: SPLC-CC%2: Cross compa… | ErrorLib