Rockwell Automation FactoryTalk Historian SE 3.0 H2H Interface User Guide - Manual (Page 46)

Historian Point Configuration
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The Historian 2 tag name attribute LongName is used if it exists.
The receiving and source tag names do not need to be identical. However, unless the
receiving tag attributes
InstrumentTag or ExDesc specify the source tag name or the
/ptid interface parameter is used, the receiving tag name is assumed to be the same as the
source tag name. The How PItoPI Finds Source Points section explains how the interface
parameters affect which receiving tag attributes are used for mapping to the source point and
the order that the attributes are searched for a mapping.
Note: If the source tag name length exceeds 80 characters, users must use the
UserInt1 attribute for source point mapping. This is due to a limitation with the PI API
programming library which supports tag names of 80 characters or less for point ID
resolution.
PointSource
The PointSource is a unique, single or multi-character string that is used to identify the
Historian point as a point that belongs to a particular interface. For additional information,
see the
/ps command-line parameter and the “PointSource” section.
PointType
The interface supports all Historian point types. Historian 2 point types are R (float16 and
float32), D (digital) and I (int16). Historian 3 point types are float16, float32, float64, int16,
int32, digital, timestamp, string, and blobs. For more information on the individual
PointTypes, see Historian Server manuals.
Users should configure interface tags to be the same PointType as their source tag to maintain
data consistency between Historian Servers. If interface tags have different PointType from
their source tags, the interface will perform point type conversion. Refer to section
Data Type
Conversion of this document.
Location1
Location1 indicates to which copy of the interface the point belongs. The value of this
attribute must match the /id startup parameter.
In some cases users may run multiple copies of the interface that share the same point source.
Each instance of the interface is differentiated by its interface ID. The
Location1 tag
attribute defines which copy of the interface a tag is assigned to.