Siemens S7-1500 Function Manual page 53

Memory usage and application examples
3.2 Memory usage for data logging
In the file browser, you can download the data logs created in the example program. It is not
possible to delete or rename the data logs in the Web server. To delete a data log you either
use the "DataLogDelete" instruction or you format the SIMATIC memory card.
On the DataLogs web page, you can have all the data logs that you created displayed. You
can call and empty the relevant data log file by clicking the icon
Note
Manipulation of the data logs using a card reader
Do not delete or change the data logs using a card reader on the PG/PC. You can copy the
data logs on the SIMATIC memory card, however, using a card reader on the PG/PC.
The recommended medium for viewing, downloading (copying) and deleting data logs is the
file browser of the web server, however. Direct file access via Windows Explorer brings with
it the risk of inadvertent deletion of modification of data logs or system files. This can cause
the files to be damaged or the SIMATIC memory card to become unusable.
Figure 3-13
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Example - Data logs in the folder "\datalogs" of the file browser
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Structure and Use of the CPU Memory
Function Manual, 10/2018, A5E03461664-AC