Automatically switch from OPC into ODBC during no communication with OPC
At this point the latest status will remain visible in the moitoring screens as soon as OPC communication is lost. But when an ODBC connection exist as a back-up the data is still available (not live but near real in 10 min - interval). It is required that as soon as there will be a communication loss at OPC for more than a certain time frame (30 min.) automatically the ODBC takes over and displays the latest 10 minute values in the monitoring screens. It also will be important to know which data is displayed real or near real data (OPC or ODBC) .
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Eric van Middendorp
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