If you have a cluster with default values and you need to modify certain values on the cluster depending on an operation you want to perform, you can use partial clusters.

In TestStand, you can specify whether to pass default values for individual elements of a cluster control that are recommended or optional. This behavior is referred to as partially specifying a cluster, or partial cluster passing.

To specify that you want to apply the default value to an element of a partial cluster, enable the Default option in the VI Parameter Table on the LabVIEW Module tab in the TestStand Sequence Editor or on the Module tab of the Edit LabVIEW VI Call dialog box in a TestStand User Interface.