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Hello all,
I am preparing a new project: WinCC Flex 2008 RT linked to S7-300 PLC via Ethernet. Process variables are logged with the archive function to a MS SQL database. All works quite good except the real variables show small steps in the archives though they change continuously in the PLC.
All variables are configured to be read continuously every second from the PLC.
For instance one variable is a pressure. It will read the same value of 50,528070 for each sample during 12 seconds then jump to 50,564240 and stays there for another 10 seconds or so.
When the variable changes at faster rate I get a different value every second. So I guess there's a threshold somewhere that avoids a refresh if the value has not changed enough but I just can't figure out where this could be configured?
This is not critical for my application, only a matter of showing nice charts and highly zoomed details.
Thanks for your help!
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