Rockwell Automation FactoryTalk Historian SE 3.0 H2H Interface User Guide - Manual (Page 153)

FactoryTalk Historian To Historian Interface User Guide 147
SMT
SMT refers to System Management Tools. SMT is the program that you use for configuring
Historian Servers. A single copy of SMT manages multiple Historian Servers. SMT runs on
either a Historian Server Node or an interface node.
pipc.log
The pipc.log file is the file to which OSIsoft applications write informational and error
messages. When a Historian interface runs, it writes to the pipc.log file. The ICU allows
easy access to the pipc.log .
Point
The PI point is the basic building block for controlling data flow to and from the Historian
Server. For a given timestamp, a PI point holds a single value.
A PI point does not necessarily correspond to a “point” on the foreign device. For example, a
single “point” on the foreign device can consist of a set point, a process value, an alarm limit,
and a discrete value. These four pieces of information require four separate Historian Points.
Service
A Service is a Windows program that runs without user interaction. A Service continues to
run after you have logged off from Windows. It has the ability to start up when the computer
itself starts up.
The ICU allows you to configure a PI interface to run as a Service.
Tag (Input Tag and Output Tag)
The tag attribute of a PI point is the name of the PI point. There is a one-to-one
correspondence between the name of a point and the point itself. Because of this relationship,
FactoryTalk Historian System documentation uses the terms “tag” and “point”
interchangeably.
Interfaces read values from a device and write these values to an Input Tag. Interfaces use an
Output Tag to write a value to the device.