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ERR_CONN_REJECTED

Incoming Connection is rejected by the IP address validation

Allen-Bradley · MicroLogix 1400 Programmable Controllers

¿Qué significa ERR_CONN_REJECTED ?

An incoming Modbus TCP connection attempt was rejected because its source IP address did not pass the controller's configured IP address validation rules. This is a security feature to control access.

Causas comunes

  • The source IP address of the client is not in the allowed list configured on the Modbus TCP server.
  • IP address validation is enabled and the client's IP is explicitly denied or not whitelisted.

Pasos de reparación & Lista de verificación

Haga clic en los pasos para seguir su progreso.

  1. 1

    Review the Modbus TCP server's IP address validation settings in the controller configuration.

  2. 2

    Add the client's IP address to the allowed list if it is a legitimate connection.

  3. 3

    Temporarily disable IP address validation if it's not required for security, but exercise caution.

Ver todos los códigos en este manual (60)
Datos técnicos verificados. Última actualización: March 2026

Fallas relacionadas

Fuente: Allen-Bradley MicroLogix 1400 Programmable Controllers