SIMATIC PCS 7 Process Control System - Siemens

■ Overview
OS clients
OS server
(redundant)
OS-LAN
Batch server
(redundant)
Central Archive
Server (CAS)
Automation
systems
The central archive server (CAS) can be used for long-term archiving
of
• OS archive data (process values and messages),
• OS reports and
• batch data of the SIMATIC PCS 7 process control system.
The process values and messages exported from the OS archives,
as well as the OS reports and batch data from SIMATIC
BATCH are managed by the CAS in a central database. They
can be visualized directly on the OS clients or with the Storage-
Plus viewer of the CAS.
© Siemens AG 2007
Operator system
OS archiving
OS long-term archiving
with Central Archive Server
Plant bus
■ Design
The SIMATIC PCS 7 OS Server (BCE version) with the Microsoft
Windows Server 2003 operating system offered in Section "SI-
MATIC PCS 7 Industrial Workstation" in the Chapter "Systemneutral
components" can be used as the basic hardware for the
CAS. The OS Software server of the SIMATIC PCS 7 V7.0 process
control system is preinstalled on this basic device in addition
to the operating system. The Central Archive Server Basic
Package is required to configure the CAS. This can be extended
to a maximum of 120000 archive variables using SIMATIC PCS 7
Archive/SIMATIC PCS 7 Archive PowerPack licenses. Detailed
information on licensing of the CAS in combination with OS
short-term archiving can be found at page 5/19 under "Features
of archive variables and licensing of short-term and long-term
archiving".
The CAS does not require a connection to the plant bus. It can
be connected to the OS and batch servers of the SIMATIC PCS 7
plant via OS-LAN (terminal bus), e.g. via the integral network
connection (Ethernet RJ45 port onboard) of the server.
Redundant design of central archive server
The CAS can also have a redundant design. This increases the
availability of long-term data, and these can also be accessed
by the OS clients or the OpenPCS 7 station. SIMATIC BATCH
does not yet swap out the batch data to the two central archive
servers. However, following automatic matching of the archives,
the batch data are available on both central archive servers following
swapping out.
The following table shows the corresponding number of components
required for single and redundant CAS configurations.
Single central Redundant
archive server central archive
(CAS)
server (CAS)
SIMATIC PCS 7 Industrial Workstation,
server version
Incl. Ethernet network card and
BCE
1 2
Central archive server basic
package
1 2
SIMATIC PCS 7 Archives/SIMATIC Licenses for Licenses for
PCS 7 Archive PowerPacks for
additional archive variables
one server two servers
WinCC option "Redundancy" -- 1
RS 232 connecting cable, 10 m -- 1
Instead of the serial RS 232 connection, it is also possible to use
a separate Ethernet connection for optimization of internal communication
between the redundant central archive servers, e.g.
as an alternative for larger distances.
Siemens ST PCS 7 · November 2007
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