Rockwell Automation FactoryTalk View Site Edition Users Guide - Manual (Page 68)

F ACTORY T ALK V IEW S ITE E DITION U SER ’ S G UIDE
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Planning to use built-in system availability features
A complete FactoryTalk system consists of all the networks, devices, and software
applications you have deployed, to monitor and control your plant or process.
Helping to ensure that the system can provide data in a secure and predictable fashion
depends on a number of variables.
To minimize data loss and down time, and to help ensure that critical parts of your system
are always available to connected clients, FactoryTalk View SE provides these health
monitoring and redundancy features:
 Server status monitoring of non-redundant and redundant application servers.
 Disconnected operation . For example, connected clients can continue to run when
the FactoryTalk Directory becomes unavailable.
 Redundant application servers . In a network distributed application, you can set
up redundancy for application servers.
These include FactoryTalk View SE Servers (also called HMI servers), FactoryTalk
Alarms and Events servers, Device Servers (RSLinx Enterprise), and OPC data
servers (RSLinx Classic, and other OPC 2.05a Data Access servers).
 Support for online changes to HMI tag and alarm properties. For information
about this feature, see page 14-23.
 Replication of HMI server changes from primary to secondary HMI servers. For
information about this feature, see page 14-16.
 Network connection monitoring on each computer (clients and servers) in the
system. For information about this feature, see page 14-31.
For more information, see Chapter 14, Setting up FactoryTalk system availability.
About redundant application servers
In theory, the ideal redundant solution includes at least one backup copy of everything—
hardware, software, networks, and so on. In practice, this is seldom feasible, or even
necessary.
Before setting up redundancy, plan:
 Which components in the system need to have backups—in other words, decide how
much redundancy is necessary.
 Where (on which computers) to locate backup systems.
 The network layout, and calculate the processing load expected for each computer.
This information can help you plan which parts of an application can share hardware.