Rockwell Automation FactoryTalk Historian SE 3.0 UniInt Interface User Guide - Manual (Page 31)

UniInt Interface User Manual 25
I/O Rate Points
I/O Rate points are used to monitor the data collection rate of an interface. An I/O Rate point
can be configured to receive 10-minute averages of the total number of exceptions per minute
that are sent to Historian by the interface. A value is considered an exception if it has
exceeded the exception limits for a given Historian point.. Since 10-minute averages are
taken, the first average is not written to Historian until 10 minutes after the interface has
started. One I/O Rate tag can be configured for each copy of the interface that is in use.
Monitoring I/O Rates on Historian Interface Node
For Windows nodes, the 10-minute rate averages (in events/minute) can be monitored with a
client application such as ProcessBook. The IOMonitor program is discussed on page DA-71
of FactoryTalk Historian System Manual I.
Configuring the Historian Point on Historian Server Node
Create an I/O Rate Tag with the following point attribute values.
Attribute Value
PointSource L
PointType float32
Compressing 0
ExcDev 0
The default settings can be used for the remaining Historian Point Attributes.
When Compressing is set to Zero the I/O Rate Tag acts like a heartbeat tag for the interface,
which can be examined easily in FactoryTalk Historian ProcessBook with markers turned on.
If a value is not written to the I/O Rate Tag every 10 minutes, there is a problem with the
interface communication. The I/O Rate tag provides a quick diagnosis of the health of the
interface, since flatlining beyond a 10 minute period or a rapid decrease in the event rate
could indicate a communication problem that requires further analysis.‖
Configuration on Historian Interface Node
It is recommended to use the ICU to create the iorates.dat file over creating this file
manually. User desiring to manual create the iorates.dat file should use the following
procedure. For the following examples, assume that the name of the Historian tag is inf0 01 ,
and that the name of the I/O Rate on the home node is inf001 .
Windows Nodes
1. Edit/Create a file called iorates.dat in the PIHOME\dat directory. The PIHOME
directory is defined either by the PIPCSHARE entry or the PIHOME entry in the