New/Edit Niagara System History Import descriptor

This window sets up a history import descriptor that uses tags instead of history IDs to import histories.

Figure 131. System History Import properties

To open this window, expand Config > Drivers > NiagaraNetwork > NiagaraStation, double-click Histories click New, select Niagara System History Import from the drop-down Type to Add menu and click OK.

Property	Value	Description
Name	text (default begins with Local_ for any history originating from the local station. If you are adding a descriptor this property defaults to NiagaraSystemHistoryImport appending numerals as needed to keep unique.)	Provides a name for the object. Editing this property is equivalent to the right-clicking Rename command on the component.In this case, the object is a system history import descriptor . Typically you leave this name at its default value. Editing this name does not affect name of resulting history that was already exported into a remote station.
History Id	text	Together the two names identify the CSV file to import from the local Supervisor PC. Histories originating in the local station show a caret (^), which is shorthand for the local station, and source history names. Typically, you leave both at their default values.
Execution Time	additional properties (`Trigger Mode` defaults to `Daily`)	Configures a time trigger that controls when to perform the function. Trigger properties are documented in the Getting Started with Niagara guide.
Capacity	drop-down list (defaults to `Unlimited`)	Defines the maximum number of history records allowed in the associated table. `Unlimited` enforces no limitation on the number of records. `Record Count` opens an additional property for defining the table limit.
Full Policy	drop-down list (defaults to `Roll`)	Defines what should happen if `Capacity` is set to `Record Count` and the specified record count is reached. `Roll` overwrites the oldest records with the newest ones. This ensures that the latest data are recorded. `Stop` terminates recording when the number of stored records reaches the specified capacity. Full policy has no effect if `Capacity` is `Unlimited`.
On Demand Poll Enabled	`true` (default) or `false`	Enables and disables polling. `true` enables a system user to use the Live Updates (play) button in History views to poll for live data for the associated imported history(ies). `false` renders this button unavailable in history views for the associated imported history(ies).
On Demand Poll Frequency	drop-down list	References the `On Demand Poll Scheduler` rates under the NiagaraNetwork’s History Policies container slot.
System Tag Patterns	text	Specifies one or more text strings matched against text values in the System Tags properties of a local history extensions, where matching text patterns result in histories exported into the remote history space.

New/Edit Niagara System History Import descriptor

Figure 131. System History Import properties

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