Siemens ST PCS 7 User Manual

OS archiving

Siemens ST PCS 7 · November 2007

5

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The central archive server (CAS) can be used for long-term ar-

chiving 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 ar-

chives, 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.

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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 "System-

neutral components" can be used as the basic hardware for the 

CAS. The OS Software server of the SIMATIC PCS 7 V7.0 pro-

cess control system is preinstalled on this basic device in addi-

tion 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.

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 fol-

lowing swapping out.
The following table shows the corresponding number of compo-

nents required for single and redundant CAS configurations.

Instead of the serial RS 232 connection, it is also possible to use 

a separate Ethernet connection for optimization of internal com-

munication between the redundant central archive servers, e.g. 

as an alternative for larger distances.

OS clients

Automation
systems

Batch server
(redundant)

Central Archive
Server (CAS)

OS server
(redundant)

OS-LAN

Plant bus 

SIMATIC PCS 7 Industrial Work-

station, server version
Incl. Ethernet network card and 

BCE

1

2

Central archive server basic 

package

1

2

SIMATIC PCS 7 Archives/SIMATIC 

PCS 7 Archive PowerPacks for 

additional archive variables

Licenses for 

one server

Licenses for 

two servers

WinCC option "Redundancy"

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RS 232 connecting cable, 10 m

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© Siemens AG 2007