OPC UA Server VIs
- Updated2023-02-21
- 2 minute(s) read
OPC UA Server VIs
Owning Palette: OPC UA VIs
Requires: OPC UA Toolkit. This topic might not match its corresponding palette in LabVIEW depending on your operating system, licensed product(s), and target.
Use the OPC UA Server VIs to create a customized OPC UA server application.
| Palette Object | Description |
|---|---|
| Add Analog Item | Adds an analog item to the address space and configures the analog item. |
| Add Folder | Creates a folder under the parent folder in the address space. |
| Add Item | Adds an item as a child to a folder you specify. |
| Add Property | Adds a property to an item. |
| Add Trusted Clients | Adds trusted OPC UA client certificates to an OPC UA server. |
| Clear All Trusted Clients | Clears the OPC UA client certificates that an OPC UA server trusts. |
| Close | Closes and destroys an OPC UA server. After you close an OPC UA server, you lose all the data that belongs to the OPC UA server. |
| Create | Creates and initializes an OPC UA server. |
| Delete Node | Deletes a node, such as a folder, item, notifier, or condition. When you delete a folder, an item, or a notifier, you delete all the child nodes. |
| Read | Reads the value, timestamp, and status of a node. You must manually select the polymorphic instance to use. |
| Register Server | Registers an OPC UA server with the UA Local Discovery Server (LDS). This VI routinely registers the OPC UA server based on register rate. |
| Start | Starts an OPC UA server. After you start an OPC UA server, you cannot add or delete folders, items, notifiers, or conditions until the OPC UA server stops. Use the Stop VI to stop an OPC UA server. |
| Stop | Stops an OPC UA server and disconnects all OPC UA clients. When you stop an OPC UA server, you still keep all the folders, items, and properties. Use the Start VI to restart the OPC UA server. |
| Unregister Server | Unregisters a registered OPC UA server with the UA Local Discovery Server (LDS). |
| Write | Writes the value and status to a node from an OPC UA server. You must manually select the polymorphic instance to use. You can write to a node before the OPC UA server starts. |
| Subpalette | Description |
|---|---|
| Alarms and Conditions VIs | Use the Alarms and Conditions VIs to subscribe to alarms and conditions for OPC UA server applications. |
| Historical Access VIs | Use the Historical Access VIs to access historical data and events for OPC UA server applications. |
Example
Refer to the OPC UA Demo.lvproj in the labview\examples\Data Communication\OPCUA directory for an example of using the OPC UA Server VIs.