Force Using the OPC Data Access 2.0 Browsing Interface

If the OPC COM DA server to connect to supports OPC Data Access 2.0 and 3.0, the new browsing interface from DA 3.0 is used. However, sometimes the DA 3.0 browse implementation in the server to connect to may cause problems.

In this case, it is possible to override this default behaviour.

Warning

Please be extremely careful when editing the configuration file by hand. It should only be done when absolutely necessary. Use the Administration or Configuration Tool instead.

Open the file [Installation Directory]/uagateway.config.xml in which the server configuration of UaGateway is stored. The configuration information for a COM DA Server has the following structure:

<OpcComDa>
...
  <OpcComDaServer>
    <Name>OPCSample.OpcDaServer.1</Name>
    <Url>opcda://localhost/OPCSample.OpcDaServer.1</Url>
    <ConnectFlag>true</ConnectFlag>
    <WatchdogTime>10000</WatchdogTime>
    <ForceDa2Browsing>false</ForceDa2Browsing>
    <ForceComInproc>false</ForceComInproc>
  </OpcComDaServer>
</OpcComDa>

To force the use of the OPC Data Access 2.0 browsing interface, set ForceDa2Browsing to true and restart the UaGateway.