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I xx .Command yy .Uncertain

Modbus Master Command Data Uncertain

Allen-Bradley · Compact 5000 I/O Serial Module

¿Qué significa I xx .Command yy .Uncertain ?

This boolean tag indicates that the data associated with a specific Modbus master command (Command yy) might be inaccurate, though the extent of the inaccuracy is not quantified. A value of 1 (Uncertain data) points to potential reliability issues with the command's data output. The tag automatically resets to 0 (Good data) once the condition causing uncertainty is removed.

Causas comunes

  • Intermittent response or inconsistent data from the Modbus slave for Command yy
  • Temporary data corruption during transmission of Command yy data
  • Timing issues with the execution or reception of data for Command yy

Pasos de reparación & Lista de verificación

Haga clic en los pasos para seguir su progreso.

  1. 1

    Troubleshoot the module to correct the cause of data inaccuracy for Command yy.

  2. 2

    Review the Modbus slave device's status and response for Command yy execution.

  3. 3

    Check for any underlying Modbus communication issues (e.g., parity, framing, timeout) specifically related to Command yy.

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Datos técnicos verificados. Última actualización: March 2026

Fallas relacionadas

Fuente: Allen-Bradley Compact 5000 I/O Serial Module