User Manual

Part A: System Overview
System Architecture - How the System is Organized
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the project. Objects can be created manually, imported through data exchange
files, or uploaded through a selective auto-discovery mechanism depending on the
type of system being connected.
A unique, extensible object modeling approach allows Desigo CC to normalize
information brought in through any interface and to provide the same look, feel,
and operation through a common set of applications regardless of the source of the
data.
The management system server contains an image of the field network systems,
which are modeled as objects. Technology limits the total number of objects a
System Manager can host. In the current Desigo CC version, the limit is set to
150,000 objects and 450,000 objects for a physical server working on a
distributed system in a segmented configuration. Sites can be further extended to
1,000,000 with fully meshed topologies and 1,500,000 objects with hierarchical
topologies. See section 2.4 Distributed System Configurations [➙ 37]
The actual number of objects that can be hosted might be further limited by
hardware resources (see section 2.1 [➙ 31] Hardware Category Definitions).
1.2.1.2 Web Server
Web servers allow a Web browser to access the system on the customer's intranet
or the Internet. A web server is required to use the Desigo CC Web, Windows App
and Flex Clients or the Web Services.
Desigo CC Web Server is based on Microsoft Internet Information Services (IIS).
IIS needs to be installed on each computer serving as the web server. IIS
installations on remote computers are supported, such as in demilitarized zone
(DMZ).
A web server can be installed on the same hardware running the management
system server or on a separate, dedicated computer.
The latter applies for instance, if the customer’s IT department requires using
existing web servers, to be installed in a separate controlled environment, or if it is
preferred not to use the resources of the system server for IIS.
By accessing a system web page in the Microsoft Internet Explorer, all files
required for Web Clients, Windows App Client environments and the system
documentation can be downloaded.
1.2.1.3 Front End Processor (FEP)
The Desigo CC Front End Processor is an extension to the Desigo CC Server to
provide additional resources to connect subsystems. Additionally, FEP can be
used as a bridge to connect an IIS to Desigo CC.
Running on separate hardware, FEP allows load balancing by distributing field
system drivers across multiple machines. Additionally, FEP can be used to
facilitate data exchange for distributed subsystems.
The Desigo CC FEP installation always includes an Installed Client and a System
Management Console.
1.2.1.4 Database Infrastructure
History Database
Desigo CC History Database Server manages historical data collected from
subsystems and user activities. The Server uses Microsoft SQL to store, manage
and maintain the historic data of the system.