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Allen-Bradley ControlLogix Ethernet Driver Help

Change the tag's data type or address to one that is supported. In response to this error, the tag will be deactivated; thus, it will not be processed again.

See Also: Addressing Atomic Data Types

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

Read Errors (Blocking) Error Messages

Read request for '<count>' element(s) starting at '<tag address>' on device '<device name>' failed due to a framing error. Block Deactivated Unable to read '<count>' element(s) starting at '<tag address>' on device '<device name>'. Block Deactivated Unable to read '<count>' element(s) starting at '<tag address>' on device '<device name>'. [CIP Error=<code>, Ext. Error=<code>] Unable to read '<count>' element(s) starting at '<tag address>' on device '<device name>'. Controller Tag data type '<type>' unknown. Block Deactivated Unable to read '<count>' element(s) starting at '<tag address>' on device '<device name>'. Data type '<type>' is illegal for this block. Block Deactivated Unable to read '<count>' element(s) starting at '<tag address>' on device '<device name>'. Data type '<type>' not supported. Block Deactivated Unable to read '<count>' element(s) starting at '<tag address>' on device '<device name>'. Block does not support multi-element arrays. Block Deactivated

Read request for '<count>' element(s) starting at '<tag address>' on device '<device name>' failed due to a framing error. Block Deactivated

Error Type: Warning

Possible Cause: A read request for tags <tag address> to <tag address>+<count> 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, <count> elements of the block will be deactivated; thus, it will not be processed again.

Unable to read '<count>' element(s) starting at '<tag address>' on device '<device name>'. Block 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, <count> elements of the block will be deactivated; thus, it will not be processed again.

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