Read OPCUA structure through datalayer

Hello all, I'm Marco.

I'm facing an issue reading a structure of bool in a siemens DB.

I created an opcua client in ctrlX witch connect to opcua server of siemens 1500 and I'm trying to read this structure from datalayer.

I'm using python 3.9 with package ctrlx-datalayer=2.2.0.

Below a snippet of the code I'm using, the response is at right of the print.

with ctrlxdatalayer.system.System('') as dlsystem:
    dlsystem.start(False)
    client: ctrlxdatalayer.client.Client
    client, conn_string = get_client(dlsystem, '192.168.1.1')

    res, var = client.read_sync(f'opcuaclient/siemens1/i=85/ns=3;s=PLC/ns=3;s=DataBlocksGlobal/ns=3;s="DB_test2"/ns=3;s="DB_test2"."a0"')
    r = var.get_data()
    print(res, r)  # Result.FAILED bytearray(b'\x10\x00\x00\x00\x00\x00\n\x00\x10\x00\x0c\x00\x08\x00\x04\x00\n\x00\x00\x00\x0c\x00\x00\x00\x00\x00\r\x80\x01\x02\n\rS\x00\x00\x00The operation could not complete because the client is not connected to the server.\x00')

Here the structure.

I have no issue when I read simpler data types.

I encountered the same problem using node-red.

Thank you, I remain available for any clarification.

Best reply by CodeShepherd

At the moment only flatbuffer data can be read as structure. Other elements need to be read as single nodes.

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DATALAYER

PYTHON

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