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.
To view these properties, expand , right-click Histories and click .
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
This component has one action, Executes, which imports of all the selected histories.