In the Project Editor, select System | Accumulators. The Accumulators dialog box will display:
For each accumulatorA facility that allows you to track incremental runtime data such as motor run hours, power consumption, and downtime., in the Cluster Name field, select the cluster that will run the accumulator. If the project has only one cluster defined, you can leave this field blank. The accumulator will default to the defined cluster.
If the project has multiple clusters, and you do not select a cluster in this dialog, CitectSCADA considers the accumulator to run on defined clusters.
Click Replace to save the changes.