WinCC/Central Archive Server (CAS)
Central process data archiving
Central data management, reliable and high-performance archiving of long-term
relevant data and central backup mechanisms are the basis of an archive server
solution. Integration in the SCADA world, data interfaces for accessing archived
data and analysis capabilities are the associated existing components.
The CentralArchiveServer (CAS) option was designed for this purpose and is used
to export the archived data of all servers in the system to an (optionally
redundant) central archive server (CAS) and manage it. Through the integration
of the CAS into the WinCC world, the data remains accessible to the WinCC
clients as well as via the WinCC standard interfaces. The WinCC/CAS can be
configured with redundancy in order to increase availability. In addition, it is
possible to use a RAID system on the CAS.
Benefits
- Central, high-performance, optionally redundant, archiving of alarms,
process values and reports (emf)
- Integrated back-up system for the archive data
- Company-wide information hub with transparent access via WinCC
clients, the WinCC/DataMonitor and the open interfaces in
WinCC/ConnectivityPack or WinCC/ConnectivityStation
- Integrated Webviewer for data analysis in the MS Internet Explorer
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Function
Both process value archives and alarm logs are created on the individual
WinCC servers and transferred to the CAS and backed up, compressed and archived
there when individual database segments have been closed. For long-term
archiving of reports, the created emf files are swapped out to the CAS. There,
they are also saved in the database. With "Store&Forward", when the network is
interrupted between the WinCC server and CAS, data will be reliably transferred
as soon as the network is operating again.
In addition, data from any OPC DA servers or from external databases can be
archived on the WinCC/CAS. The WinCC/CAS thus becomes a company-wide information
hub, via which the centrally acquired data can be forwarded to the production
level and the corporate management level MES/ERP.
The access rights for the central archive server data are set in the WinCC user
administration.
Fig. Central Archive Server with remote databases and OPC servers
Accessing data for displaying and analysis is possible and transparent via the
WinCC client or the WinCC/DataMonitor client option. It is of no consequence
whether the data is on the WinCC server or already on the CAS. For displaying
(e.g. in WinCC Online Trend or WinCC Alarm Control), the data is automatically
and correctly delivered for the selected time range. In addition, the data saved
on the CAS can also be viewed via the "StoragePlus Webviewer" in the options
package with the aid of the MS Internet Explorer. It provides views of alarm
tables, hit lists, process values in the form of trends or tables and WinCC
reports. The data of the distributed WinCC system can also be accessed through
the familiar interfaces (OPC DA, OPC HDA, OPC A&E, OPC (historical) A&E and
OLE-DB) of the WinCC/ConnectivityPack option or WinCC/Connectivity Station. In
this manner, the data saved in the CAS can be efficiently transferred to
higher-level systems or used for the purposes of analysis.
Licenses
The WinCC/CentralArchiveServer (CAS) option contains all of the licenses for a
central archive server with up to 1500 archive tags. If higher quantity
structures occur over the course of the project, the number of usable archive
tags can be upgraded via Archive PowerPacks by 1,500, 5,000, 10,000, 30,000 or
80,000 archive tags to a maximum of 120,000 archive tags.
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