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Allen-Bradley ControlLogix Ethernet Driver Help

Read Errors (Non-Blocking) The following error/warning messages may be generated. Click on the link for a description of the message.

Read Errors (Non-Blocking) Error Messages

Read request for tag '<tag address>' on device '<device name>' failed due to a framing error. Tag deactivated

Unable to read '<tag address>' on device '<device name>'. Tag deactivated

Unable to read tag '<tag address>' on device '<device name>'. [CIP Error=<code>, Ext. Error=<code>]

Unable to read tag '<tag address>' on device '<device name>'. Controller Tag data type '<type>' unknown. Tag deactivated

Unable to read tag '<tag address>' on device '<device name>'. Data type '<type>' is illegal for this tag. Tag deactivated

Unable to read tag '<tag address>' on device '<device name>'. Data type '<type>' not supported. Tag deactivated

Unable to read tag '<tag address>' on device '<device name>'. Tag does not support multi-element arrays. Tag deactivated

Read request for tag '<tag address>' on device '<device name>' failed due to a framing error. Tag deactivated

Error Type: Warning

Possible Cause: A read request for the specified tag failed due to one of the following reasons:

  • 1.

    Incorrect request service code.

  • 2.

    Received more or less bytes than expected.

Solution:

If this error occurs frequently, there may be an issue with the cabling or the device itself. If the error occurs frequently for a specific tag, contact Technical Support. Increasing the request attempts will also give the driver more opportunities to recover from this error. In response to this error, the tag will be deactivated; thus, it will not be processed again.

Unable to read '<tag address>' on device '<device name>'. Tag deactivated

Error Type: Warning

Possible Cause:

  • 1.

    The Ethernet connection between the device and the Host PC is broken.

  • 2.

    The communication parameters for the Ethernet connection are incorrect.

  • 3.

    The named device may have been assigned an incorrect IP address.

Solution:

  • 1.

    Verify the cabling between the PC and the device.

  • 2.

    Verify that the correct port has been specified for the named device.

  • 3.

    Verify that the IP address given to the named device matches that of the actual device.

Note: In response to this error, the tag will be deactivated and will not be processed again.

Unable to read tag '<tag address>' on device '<device name>'. [CIP Error=<code>, Ext. Error=<code>]

Error Type: Warning

Possible Cause:

The device returned an error within the CIP portion of the Ethernet/IP packet during a read request for the specified tag.

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