Rockwell Automation FactoryTalk Historian SE 3.0 Live Data Interface User Guide - Manual (Page 37)

Chapter 6
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I/ORates Tag Configuration
An I/ORates tag measures the throughput of an FTLD Interface. In
particular, the value of an I/ORate point represents a 10-minute average of
the total number of values per minute that the FTLD Interface sends to the
FactoryTalk Historian server. Because values are averaged over a 10-
minute interval, the first calculated value is not written to the Historian
server earlier than 10 minutes after the interface has started. You can
configure one I/ORates tag for each copy of the FTLD Interface that is in
use.
The Historian system documentation often uses the terms Event Counter Tag
and I/ORate Point synonymously.
Monitoring I/ORates Tag on the Interface Node
For Windows nodes, the 10-minute rate averages (in events/minutes) can
be monitored with a client application such as PI ProcessBook.
Configuring I/ORates Tag with ICU
The Interface Configuration Utility (ICU) provides a user interface for
creating and managing the I/ORates tag.