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WinCC RT Pro V16 loose data log when download new program

1/18/2023 12:01 PM	Rate (0)
Savage123 Regular Member Joined: 11/2/2022 Last visit: 5/21/2025 Posts: 21 Rating: (0)	Hi, i am facing 2 problems with WinCC RT Prof V16. 1) When i make some changes and download the program i noticed that the historical data (trends, graphs) dissapear. Like every time you download the program, wincc delete the database. 2) When i try to do data export from a trend, (for a period of a month), from the csv file missing a lot of information, like it exports only 2 days from 30 that i wanted. Thanks in advance!

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1/18/2023 12:09 PM	Rate (0)
serendipity0 Posts: 304 Rating: (27)	Hi! Please share with us your O.S and the exact version installed. Br!
serendipity0 Posts: 304 Rating: (27)
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1/18/2023 12:10 PM	Rate (0)
Hazard_7 Bronze Member Joined: 5/30/2022 Last visit: 1/7/2026 Posts: 634 Rating: (103)	Hi savage123, Regarding the first problem you are experiencing, make sure that when loading the programme you do not check the option to "overwrite file data".
	If this information really helps, you could use the Rate function. Best Regards.
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This contribution was helpful to 1 thankful Users Savage123

1/18/2023 12:18 PM	Rate (0)
Savage123 Regular Member Joined: 11/2/2022 Last visit: 5/21/2025 Posts: 21 Rating: (0)	I Run v16.0 in a windows 10 pc

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1/18/2023 1:53 PM	Rate (0)
Savage123 Regular Member Joined: 11/2/2022 Last visit: 5/21/2025 Posts: 21 Rating: (0)	Also can you inform what's the difference in historical data between memory and database in storage location? If i select memory maybe i will be able to log more data? Thanks!

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1/25/2023 12:38 PM	Rate (0)
Murof Platinum Expert Joined: 8/3/2009 Last visit: 1/16/2026 Posts: 16644 Rating: (1944)	Hello Savage123 Use always database for storage of data in WinCC Prof (not memory!) Also you can choose if you download the program to the runtime station if you want to overwrite the RT data or not bye Murof
	If this Information really helps, you could use the Rate function
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This contribution was helpful to 1 thankful Users Savage123