Rockwell Automation FactoryTalk View Site Edition Users Guide - Manual (Page 146)

F ACTORY T ALK V IEW S ITE E DITION U SER ’ S G UIDE
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Network distributed applications are described in Chapter 6, Working with
network distributed applications. Local station applications are described in Chapter 8,
Working with local station applications.
Parts of a network station application
A typical FactoryTalk View SE network station application consists of:
 One or more areas that divide the application into manageable parts or organize it in a
way that makes sense for the process it is controlling. Keep in mind that only one HMI
Server can be added to a FactoryTalk View SE network station application.
 An HMI server that provides FactoryTalk View components and services to
application clients. A network station application can contain only one HMI server.
 HMI project components such as graphic displays, HMI tags, and data log models.
 One or more data servers, providing clients with access to information in
programmable controllers, devices, and other data servers that comply with the OPC-
DA 2.05a specification, with or without the use of HMI tags.
In a network station application, you can use multiple RSLinx Enterprise and OPC
data servers (including RSLinx Classic), running on different computers. You can also
set up a redundant pair of host computers for each data server in the application.
RSLinx Enterprise servers can be set up to subscribe to device-based alarms detected
in Logix5000 controllers. For more information, see Chapter 12, Setting up
FactoryTalk alarms.
 A list of users, plus the security codes that allow or deny these users permission to
access secured HMI project components at run time.
 Optionally, one or more FactoryTalk Tag Alarm and Event Servers, to provide alarm
monitoring and control for tags in devices that do not have built-in alarm detection.
For more information, see Chapter 12, Setting up FactoryTalk alarms.
The HMI server and the HMI client are the software programs behind a network station
application that must be located on the same computer. The FactoryTalk Directory Server,
the RSLinx Enterprise data server, and the OPC data servers can be located on remote
computers.
Every vendor’s OPC data server is different. Some contain their own tag databases, like the
tag database in an HMI server, while others reference the tag databases or addresses that
exist in controllers, as is the case with RSLinx and RSLogix.