Redundancy

Redundancy is supported several ways:

InduSoft Web Studio or CEView publish screens as web pages either to Internet Explorer or Secure Viewer. The screen graphics are published as html pages via a "web server". The data is published via a "data server. InduSoft features:

• Support for redundant web servers
• Support for redundant data servers

InduSoft also allows connections to databases. Databases can be used to log data from Alarms, Events or Trends. The "Grid" object can interact with databses directly.

• Redundant: In this mode, IWS saves data in both Primary and Secondary Databases. If one of these databases is unavailable, IWS keeps saving data only in the database that is available. When the database that was unavailable becomes available again, IWS synchronizes both databases automatically.

• Store and Forward: In this mode, IWS saves data in the Primary Database only. If the Primary Database becomes unavailable, IWS saves the data in the Secondary Database. When the Primary Database becomes available again, IWS moves the data from the Secondary Database into the Primary Database.