Rockwell Automation FactoryTalk View Site Edition Users Guide - Manual (Page 131)

6 • W ORKING WITH NETWORK DISTRIBUTED APPLICATIONS
6–9
•
•
•
• •
6 • Pl
aceh
ol
der
 To create an absolute reference to the display called Overview in the root area of the
application, type
Display /::Overview
 To create a relative reference to the display called Overview, in the area where the
Display command is run, type:
Display Overview
System availability
To minimize data loss and down time, and to help ensure that critical parts of a control
system remain available to connected clients, FactoryTalk View SE provides features such
as server status monitoring, support for online changes, and support for redundant servers.
For information about these and other availability features, see Chapter 14, Setting up
FactoryTalk system availability.
About HMI server redundancy
In process monitoring and control automation, redundancy refers to the ability of the
system running the process to continue working correctly, when parts of the system
become unavailable or fail.
In a FactoryTalk View SE network distributed application, you can set up redundancy on
paired computers, for critical components such as HMI servers. You can set up HMI
redundancy in Network Distributed applications only. One computer in the pair hosts the
primary server, and the other hosts the secondary (or backup) server.
In the event that the primary HMI server cannot provide service to application clients, the
system switches to the secondary server, and FactoryTalk View SE Clients continue to
function normally. There is no need to restart client or server computers.
You can set up Data Server and FTAE Redundancy in Network Distributed applications
and Station applications. Redundancy is not available for Local Station applications. For
more information, see “Setting up a redundant HMI server pair” on page 14-13.
Use the Command Wizard to build commands that take application components as parameters.
The wizard supplies the correct syntax, based on the location of the component you select.
You can set up HMI redundancy in network distributed applications only. You can set up Data
Server and FTAE Redundancy in network distributed applications and network station
applications, but not in local station applications.
For details about setting up redundancy for other application servers, such as third-party OPC
data servers, see the product documentation.