Rockwell Automation FactoryTalk Historian SE 3.0 H2H Interface User Guide - Manual (Page 92)

UniInt Failover Configuration
86
Historian Tag ExDesc Required /
Optional Description Value
[UFO2_DEVICESTAT :#]
(IF-Node1) Required Device Status 1 Tag
The ExDesc must start with the
case sensitive string:
[UFO2_HEARTBEAT:#]
The value following the colon (:)
must be the Failover ID for the
interface running on IF-Node1
The PointSource must match the
interfaces‟ point source.
Location1 must match the ID for the
interfaces.
A lower value is a better status and
the interface with the lower status
will attempt to become the primary
interface.
The failover 1 device status tag is
very similar to the UniInt Health
Device Status tag except the data
written to this tag are integer
values. A value of 0 is good and a
value of 99 is OFF. Any value
between these two extremes may
result in a failover. The interface
client code updates these values
when the health device status tag is
updated. 0 - 99 / None
Updated by the
interface on
IF-Node1
[UFO2_DEVICESTAT :#]
(IF-Node2) Required Device Status 2 Tag
The ExDesc must start with the
case sensitive string:
[UFO2_HEARTBEAT:#]
The number following the colon (:)
must be the Failover ID for the
interface running on IF-Node2
The PointSource must match the
interfaces‟ point source.
Location1 must match the ID for the
interfaces.
A lower value is a better status and
the interface with the lower status
will attempt to become the primary
interface. 0 - 99 / None
Updated by the
interface on
IF-Node2
[UFO2_STATE:#]
(IF-Node1) Optional State 1 Tag
The ExDesc must start with the
case sensitive string:
[UFO2_STATE:#]
The number following the colon (:)
must be the Failover ID for the
interface running on IF-Node1
The failover state tag is
recommended.
The failover state tags are digital
tags assigned to a digital state set
with the following values.
0 = Off: The interface has been
shut down.
1 = Backup No Data Source: The 0 - 5 / None
Normally updated
by the interface
currently in the
primary role.