AxOnlineTrendControl not showing archived values

Everytime I open the runtime page that contains the AxOnlineTrendControl, the displayed vaules lines start to show from rigth to left, the curve point to: 

Data source: 1- Archive tags  

Online configuration: retain permanently 

Online configuration at next picture change: retain 

So I expect that the values shown are coming from historical data, but if I close the trend window, and reopen it the curve start again from rigtht to left, the previous data apparently disappeared.

The same happen with OnlineTableControl.

Green computers icons on the status bar.

Surely is a my error of configuration, can you please help me to fix it so I can read archived values?

Hi SummerSeaSun,

what exact wincc version do you use ? what update ?

Best regards

schufri

Hi,  I'm using: Wincc 7.5 SP2 Upd4 

Hello bg2492,

In the properties of the Trend-Control in the tab "Trends", the field "Data Connection" for the

"Data Source" points to the "Archive tags" 

In the Taglogging-Editor in the properties of the Process value archive I have set "Hard disk"

Something  else is missing?

Thanks, BR