OPC UA Server Hierarchy

Estimated reading time: 2 minutes

OPC UA server hierarchies involve different types of nodes that map to OPC UA clients.

Types of Nodes:

  • Folder to represent an industrial plant
  • Devices to represent devices with sensors on the plant floor (such as a boiler)
  • Tags to collect data from specific registers in the devices (such as temperature or pressure)

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Add a Node

To add a node:

  1. In the navigation panel, go to OPC UA > Hierarchy.
  2. Click on a parent node in the hierarchy.
  3. Click + to add a new node.

    The new node will have folder1 as a parent node in the below screenshot.

  4. Select the node type. Enter the required information. Click Add.

  5. Click to save your changes.

Delete a Node

To delete a node:

  1. In the navigation panel, go to OPC UA > Hierarchy.
  2. Select a node.
  3. Click - to delete the node and all of its children. This example below will delete folder1 and device1:

    The - button will immediately delete the node and all of its children with no confirmation. Changes do not stick until you click . If you click - by mistake, don’t panic, simply navigate away from and back to the hierarchy page.

  4. Click to save your changes.

Reset and Import Nodes

To reset and import nodes:

  1. In the navigation panel, go to OPC UA > Hierarchy.
  2. Click to reset the hierarchy and remove all nodes.

    Changes do not stick until you click . If you click by mistake, don’t panic, simply navigate away from and back to the hierarchy page.

  3. Click to import nodes based on your DeviceHub configuration. Click Yes to confirm the import.

  4. The hierarchy will create nodes based on devices and tags under a OT Link Platform node.

    You can always rename the OT Link Platform node in the Configuration tab on the right.