Description

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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

Design and Functions

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.

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.

Hint:

Suitable protective measures (among others IT-Security, e.g. network segmentation) have to be taken up to ensure a safe operation of the plant. You find further information about the topic of Industrial Security on the Internet under www.siemens.com/industrialsecurity