driver-ConfigRule
This component of the NiagaraNetwork selects the histories to export from one or more remote stations and determines what happens in the receiving station.
To view these properties in a receiving station, expand right–cllick the NiagaraNetwork, click , expand History Policies and click Default Rule.
| Property | Value | Description |
|---|---|---|
| Device Pattern | text (defaults to wildcard (*) which exports from all stations) | Identifies the names of station(s) with histories to export. |
| History Pattern Name | text (defaults to wildcard (*) which exports all histories) | Identifies the names of histories to export. Note: Both Device Pattern and History Name Pattern must apply for the rule to be used—otherwise, the receiving station
evaluates the history in question against the next rule down (in order)
under History Policies. |
| capacity | drop-down list | Specifies the number of trend
log records (histories) to store in the histories database. When capacity
is reached, newer records overwrite the oldest records. |
| fullPolicy | drop-down list | Specifies what happens when
a trend log (history) reaches capacity. Applies only if Capacity is set to Record Count. When capacity reaches record count, the newest records overwrite the oldest records. Roll ensures that the latest data are recorded. Stop terminates recording when the number of stored records reaches capacity. Full policy has no effect if Capacity is Unlimited. |