A tag string is a full point identifier. It includes the point’s Site, Current Value Service, and point identifiers. The current value service may be a UIS, HSS, OPCIS, or a SVCMON.
CygNet supports the following tag string formats:
| Type | Components |
|---|---|
|
Tag String |
Site.Service.PointID |
|
Long Tag String |
Site.Service:LongID |
|
Facility Tag String |
Site.Service::FacilityID.UDC Note: The Facility Tag String format does not work with VHS script methods, because the VHS does not have a Facility column. |
|
Full Tag String |
Site.Service.PointID:LongID |
Punctuation is critical. Note the use of periods, colons, and double colons.
Point IDs and Long IDs are typically generated by the system. The Point ID is auto-numbered and the Long ID is a concatenation of the Facility ID and UDC properties.
If a tag is deleted and re-added to the system, the new Point ID will not match the old Point ID since auto-numbering will utilize the next available number in the database. The Long ID will match since the Facility ID and UDC properties will be the same.