Reconcile OPC UA nodes

To be able to use OPC UA nodes in the Avelon ecosystem, they must first be transferred to the system and synchronized (reconciled) with the Avelon database. To reconcile nodes, first select the appropriate server from the Server dropdown.


The node reconciliation creates a data point for each selected OPC UA node, which can then be used in the Avelon control system.

Reconcile individual nodes

To reconcile a specific individual node, select it in the OPC UA node tree, then click on Reconcile Node at the top.

Reconcile multiple nodes

To reconcile multiple nodes from the selected OPC UA server, click on More above the node tree and then on Reconcile Node.

This not only reconciles existing data points or adds new data points, but also deletes those data points whose OPC UA nodes no longer exist.

This option is more convenient than reconciling individual nodes, and it automatically cleans up and removes old data points that no longer exist. However, the process also takes longer than when individual nodes are reconciled.

Reconcile nodes

Two different comparison strategies are available to enable the system to assign the OPC UA nodes to the existing data points:

Reconcile by ID

The reconciliation takes place by node identifier. Use this mode if the display name of the OPC UA nodes has changed since the last reconciliation.

Reconcile by Name

The reconciliation takes place by display name. Use this mode if the node identifiers have changed since the last reconciliation.


You can select any comparison strategy for the first-time reconciliation.


If both the node identifier and the display name have changed since the last reconciliation, automatic reconciliation is no longer possible. Data points that have been deleted by the reconciliation cannot be restored. Therefore, always make sure that only one of the two characteristics changes. Of course, it is even more preferable for neither of the two characteristics to change after the first reconciliation.

First, a preview of the potential changes is displayed. This does not change any data. The preview shows all data points that will be either created, changed or deleted by the reconciliation. Use the tabs in the action bar at the top to toggle between the three different views.

If the changes displayed are correct, you can start the reconciliation by clicking on Reconcile at the top right.