OPC Unified Architecture (OPC UA) and the DeltaV system

Create OPC UA client signals

Each OPC UA client signal reads a specific node ID in the OPC UA server.

  1. In the DeltaV Explorer hierarchy, select the logical device and right-click New OPC UA Signal.
  2. The system displays the OPC UA Signal dialog.
  3. Click Browse Online next to the Node Id field. If you have established communication with the server, the system displays the Browse Nodes window. The window enables you to navigate the server’s address space. Items available to the client have a checkbox.
    Note

    If your server supports off-line nodesets, the software enables you to browse offline as well. To use an off-line nodeset, click the Browse Offline checkbox and browse to the xml nodeset file through the Windows Explorer.

  4. Select the checkbox next to the item you want this signal to read.
    Note

    The signal and node ID relationship is one-to-one. You can only select one checkbox per signal.

  5. Click OK.
  6. Click the physical device then right-click Download → OPC UA Physical Device.
    Note

    If the OPC UA signal is mapped to a dynamic reference parameter, the signal returns the data type of the parameter to which the dynamic reference parameter is bound. For example, if the dynamic reference parameter is bound to a floating point parameter, the OPC UA signal returns a floating point data type. If the bound parameter is changed to another type, the signal goes bad because there is a mismatch. You must manually change the data type of the signal and download the OPC UA client to restore communications.