Rockwell Automation FactoryTalk Historian SE ProcessBook 3.2 User Guide - Manual (Page 256)

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FactoryTalk Historian ProcessBook User Guide
238
Displays are updated whenever values change. Every five seconds,
FactoryTalk Historian ProcessBook displays any new values for tags in
open displays from each FactoryTalk Historian server. You can modify the
update rate. See Procbook.ini (page 315) for more details.
For trends, new values are added to the trend traces. This update by
exception algorithm has two benefits:
 Values that do not change are not sent over the network at every
update. This can be a significant efficiency improvement over
traditional scanning.
 Values that change more than once within five seconds are shown
accurately on trends because all of the changes are delivered to
FactoryTalk Historian ProcessBook.
Values from PI calculations and custom data sets are also updated
dynamically.
Element Relative Display (ERD)
Element Relative Display (ERD) is an add-in (page 13) that replaces the
hierarchical, Module Database (MDB)-based Module Relative Display
add-in from earlier versions of FactoryTalk Historian ProcessBook with an
asset store based on FactoryTalk Historian Asset Framework elements and
their associative attributes. This approach allows you to organize and
structure FactoryTalk Historian system and other data according to objects
users are most familiar with, and then visualize that data in a ProcessBook
display.
FactoryTalk Historian ProcessBook allows you to search an AF database
for elements and their attributes. You can then add these data objects to
dynamic symbols to graphically display this data in real-time. For more
information on AF and elements, see About FactoryTalk Historian Data
(page 229), and the FactoryTalk Historian AF User Guide.