A System History Import Tag creates a Niagara SystemHistoryImport descriptor on the Supervisor, to import histories based upon “System Tag” property values. System tag importing of histories was first introduced in AX-3.4.

The System History Import Tag includes configuration properties of the Niagara SystemHistoryImport descriptor, including the “System Tag Patterns”, “On Demand Poll” properties, and “Config Override” properties. Also included is a “Use Category Mask” property. For more details, see SystemHistoryImportTags.