Rockwell Automation FactoryTalk Historian SE 3.0 H2H Interface User Guide - Manual (Page 140)

Interface Diagnostics Configuration
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Allow the user to search the Historian Server for a previously defined I/O Rate tag.
Interface Status Point
The Historian Interface Status Utility (ISU) alerts you when an interface is not currently
writing data to the Historian Server. This situation commonly occurs if

the monitored interface is running on an interface node, but the interface node cannot
communicate with the Historian Server; or

the monitored interface is not running, but it failed to write at shutdown a System
state such as Intf Shut .
The ISU works by periodically looking at the timestamp of a Watchdog Tag. The Watchdog
Tag is a tag whose value a monitored interface (such as this Interface) frequently updates.
The Watchdog Tag has its
ExcDev , ExcMin , and ExcMax point attributes set to 0. So, a non-
changing timestamp for the Watchdog Tag indicates that the monitored interface is not
writing data.
Please see the Interface Status Interface for complete information on using the ISU. Historian
Interface Status Utility runs only on a Historian Server Node.
If you have used the ICU to configure the Historian Interface Status Utility on the Historian
Server Node, the ICU allows you to create the appropriate ISU point. Select this Interface
from the Interface drop-down list and click Interface Status in the parameter category pane.
Right-click on the ISU tag definition window to bring up the context menu: