niagaraDriver-NiagaraHistoryImport

This component configures import properties for a remote history, including collection (pull) times, current status, local history Id, and config overrides. History imports reside under the Histories extension of the NiagaraStation in the NiagaraNetwork.

Figure 60. Niagara History Import properties

To view these properties, expand Config > Drivers > NiagaraNetwork > NiagaraStation, right-click Histories and click Views > AX Property Sheet.

In addition to the standard properties (Status, Enabled and Fault Cause) these properties configure this component.

Property	Value	Description
State	read-only	Reports the current state of the data transfer as: `Idle`, `Pending` or `In Progress`.
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.
Last Attempt	read-only	Reports the date and time of the last attempted execution.
Last Success	read-only	Reports the date and time of the last successful execution.
Last Failure	read-only	Reports the date and time of the last execution failure.
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.
Config Overrides, 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.
Config Overrides, fullpolicy	drop-down list (defaults to `Roll`)	Defines what happens 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`.

Action

Figure 61. NiagaraHistoryImport actions menu

This component has one action, Executes, which imports of all the selected histories.