Use the fields within the Tag Names section of the AVEVA Historic Data Export tab to specify the properties that are associated with tag names.
When you configure a new Geo SCADA Expert point or accumulator for historical data storage, Geo SCADA Expert will automatically use HCAL to create a new tag in the historian when it exports the first data (see Historian Tags).
If you change the Prefix, then Geo SCADA Expert will only apply the new Prefix to points or accumulators to which you have not yet exported any data or that you subsequently create. All existing points or accumulators will continue to use the old tag Prefix . Therefore, we recommend that you do not put the AVEVA Historic Data Export item 'in service' until you have specified the required Prefix.
Likewise, if you enable or disable the Aggregate Name Suffix, then Geo SCADA Expert will only include or exclude the Aggregate Name Suffix on points or accumulators to which you have not yet exported any data or that you subsequently create. All existing points or accumulators will continue to use the Aggregate Name Suffix setting that applied at the time that data was first exported for those points and accumulators. Therefore, we recommend that you do not put the AVEVA Historic Data Export item 'in service' until you have specified the required Aggregate Name Suffix setting.
You can display the tag name of each point or accumulator by using the Status display (see Status Displays in the Geo SCADA Expert Guide to ViewX and Virtual ViewX Clients and see Find a Historian Tag Name in Geo SCADA Expert).
- Prefix—(Optional). Use to specify a prefix to the tag name in the historian. For example, 'CS1'.
Geo SCADA Expert automatically adds a dot separator (.) between the prefix and the tag name.
The purpose of the prefix is to uniquely identify the system from which the tag data has been exported. Therefore, you should specify a prefix that identifies the system from which you are exporting data. This helps to prevent name conflicts in a situation where users may export data from multiple systems to a historian in an AVEVA application.
- Aggregate Name Suffix—Use to specify whether the aggregate name is to be appended to the tag names. This is the name of the historic aggregate that is associated with the points' or accumulators' data in Geo SCADA Expert. Many points and accumulators have a single historic aggregate for which the suffix is usually .Historic. However, some database items have multiple historic aggregates, which have different names to uniquely identify each of those aggregates.
Enable the check box to append the tag names with the aggregate name. This is optional if the points and accumulators only have a single historic aggregate. You have to enable the check box if any of the points or accumulators have multiple historic aggregates (to prevent all of the historic data from being merged into a single historian tag per point or accumulator). When this check box is enabled, Geo SCADA Expert automatically adds a dot separator (.) between the tag name and aggregate name.
Clear the check box if the aggregate name is not to be appended to the tag names. This is the default.
Further Information
Examples that demonstrate how the content of a tag name differs, depending on whether the Prefix and Aggregate Name Suffix are used: see Historian Tags.