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AM2432: EtherNet/IP Net Red LED Blink

Joshua CH Li
Intellectual 370 points

Part Number: AM2432

Hi Expert,

We use Rockwell PLC connect to AM243  for two hours, but we get retrun code "LED_RED_BLINK" state from EI_API_ADP_getModuleNetworkStatus API function.

Which senerio lead to this error occur?

Do you have any idea for troubleshooting?

Thanks,

Joshua

  • 0
    TI__Intellectual 2860 points

    Hi Joshua,

    The "LED_RED_BLINK" indicator may signify one of these two scenarios:

    1) An I/O connection has timed out.
    2) The device has encountered a recoverable fault state, which can occur when Address Conflict Detection identifies an IP address conflict.

    Best regards,
    Pourya

  • 0 in reply to Pourya Eskandari
    Intellectual 370 points

    Hi Pourya,

    Thank you for your reply.

    We find this issue in long time test, so maybe the reason of LED_RED_BLINK is I/O connection has timed out.

    Do you have any idea about which reason lead to I/O connection timed out?

    Thanks,

    Joshua

  • 0 in reply to Joshua CH Li
    TI__Intellectual 2860 points

    Hi Joshua,

    when establishing an I/O connection via ForwardOpen request, timing parameters for the O->T connection (Originator (PLC) to Target (device)) are specified. For example, a 25ms cycle with a 4x multiplier timeout would mean that the connection times out if the device doesn't receive any I/O packets from the PLC for 100ms.
    What is the timing parameters in your case?

    Are you observing that the PLC is detecting an I/O connection fault and subsequently attempting to reestablish the connection?

    Best regards,
    Pourya