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Unable to write to single element in OPC array. Reading works fine

Eivind Falang

Hi. 

We are curently facing a problem writing to single element in OPC array (KEPserver OPC UA) tags from plant scada.
I can read but not write to single element array tags, this applies only to array tags,  read/write for other non-array format works

Address

OPCtag!A[12] (12 elements of float)

ScadaTag

testtag1

Read and Write in graphics 

testag1[1], testag1[2], testag1[3] etc. 

If i change values ifromOPC client it changes in plant scada, but not vice versa. 

Parents

  • Please ensure you have Citect user logged in to perform write request.

    Also ensure you are using the latest OPCUA driver (4.4.5.0 is latest version).

    Enable driver logging (see driver help for details) to see if any error code is returned.

    Try another OPC UA Server, to see if it is specific issue to KepServer or you think the problem lies on SCADA side.

    Finally, if still experiencing issues, get in contact with AVEVA support.

  • in reply to Olivier

    Update: Contacted Aveva and it seems to be a bug in the driver.

    Aveva managed to reproduce the problem and are reaching out to the R&D driver team for further investigation

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