Rockwell Automation FactoryTalk Historian SE 3.0 Live Data Interface User Guide - Manual (Page 23)

Chapter 4
17
Point Source
The FactoryTalk Historian Live Data Interface uses FTLD as the Point
Source. A Point Source is a unique, single- or multi-character string that is
used to identify a Historian point as a point that belongs to a particular
interface.
For example, the string Boiler1 may be used to identify points that belong
to the MyInt Interface. To implement this, the Point Source attribute would
be set to Boiler1 for every Historian Point that is configured for the MyInt
interface. Then, if /ps=Boiler1 is used on the start-up command line of the
MyInt interface, the interface will search the Historian Point Database
upon startup for every Historian point that is configured with a Point
Source of Boiler1.
Before an interface loads a point, it also examines additional Historian
point attributes to determine whether a particular point is valid for the
interface. For additional information, see Command-line Parameters (page
37).
PI 3 Server Node: Reserved Point Sources
Several subsystems and applications that are shipped with PI System are
associated with default Point Source characters:
Subsystem Point Source character
Totalizer T
Alarm G and @
Random R