niagaraDriver-NiagaraVirtualNetworkExt

This component configures a NiagaraNetwork’s cache policies for virtual components.

For Supervisor stations that uses virtuals, this component configures cache properties and Px file policies. Remote stations do not require this component.

Figure 1. Niagara Virtual Network Ext properties

To access these properties, expand Config > Drivers, right-click the NiagaraNetwork, click Views > AX Property Sheet, click Virtual Policies.

Name	Value	Description
Cache Policy	additional properties	Configures how memory supports virtual components. Additional topics document these properties: “niagaraVirtual-NiagaraVirtualCachePolicy” and niagaraVirt”ual-DefaultNiagaraVirtualCache.”
Import Virtual Px Files On Demand	true, false (default)	Enables (true) and disables (false) the importation of Px views on demand.
Px File Import Overwrite Policy	Drop-down list (defaults to Checksum)	Configures when to overwrite the file import descriptors that the driver created in the station automatically on demand. Px views on virtuals work by creating file import descriptors under the NiagaraStation's Files device ext. Checksum Last Modified overwrites the descriptors that were modified last.
Px File Import Execution Time	Drop-down list (defaults to Manual)	Specifies the execution time interval to use on file import descriptors that the station creates automatically on demand. Manual indicates that a user action triggers the import. Daily imports file descriptors at the defined time every day. Interval imports file descriptors when the specified amount of time passes.
Virtual Px File Directory	file:^nstations	Defines the root directory to which to import file import Px files when they are created on demand. The driver organizes imported Px files under this root directory by station name and file path as it existed on the remote station.
Virtual Px File Media Directory	file:^nstations	Sets up the root directory to which the driver imports Px media files (image files, etc) when it creates a file import descriptor. The driver organizes imported Px files under this root directory by station name and file path as it existed on the remote station.
Convert Alarm Hyperlinks To Virtual Form	true, false (default)	As of Niagara 4.13, if set to true, generated alarms routed up to the local station from another downstream station will have their hyperlink Ords converted to "nspace" form (when applicable). This conversion allows resolving alarm hyperlinks to Niagara virtuals on the local station instead of making a direct hyperlink connection to a subordinate station.