Trend problem

Hi

I have a strange problem with a PCS7 system, the problem is with our trends for some reason “60 seconds” in the trends is equal to approximate 40 second in real time, that means after some hours the data base is way ahead in the future.

I have attach a screen shot where the problem is showed, the first paged showed the time table for the trend is way ahead, according the time in the WinCC system.

I have also read out from the WinCC data base and it is very clear the entrance is done with the with an incorrect time stamp according the PC time.

The system is clock sync, I have verified the time on all PLC’s servers and client’s they have the same time and also the same time zone.

I have tried to reset the tag logging on both serves, but every time the tag longing is wrong.

The System is PCS7 V7.1 SP3

Any idea how to troubleshoot the problem? Or a solution.

Hi Ssc_Mikro,

if the time stamp is incorrect in the data base than OS server and AS are not synchronized correctly.The time stamp in data base is from the AS (should be UTC) .

Check if your AS has the correct time.

Hope you can solve this issue on this way!