Rockwell Automation FactoryTalk Historian SE 3.0 UniInt Interface User Guide - Manual (Page 80)

UniInt Failover Scheme
74
Business Network
Process Network
IF-Node1
PI-Interface.exe
/host=PrimaryPI
/UFO_ID=1
/UFO_OTHERID=2
IF-Node2
PI-Interface.exe
/host=SecondaryPI
/UFO_ID=2
/UFO_OTHERID=1
DataSource
DCS/PLC/Data Server
Client
Process Book
DataLink
PrimaryPI
PI Server
Role = 1
SecondaryPI
PI Server
Role = 2
Active ID
Heartbeat 1
Heartbeat 2
Data register 0
.
.
.
Data register n
Figure 1: Failover Architecture
The failover architecture is shown in Figure 1. The figure above shows a typical network
setup. This by no means includes the myriad of configurations that are supported, it is meant
to be used for an example. The figure is repeated and explained in greater detail after the
discussion of the required start-up parameters, data source points and Historian tags.