Siemens SIMATIC PCS 7 Configuration Manual page 190

Compiling and downloading
9.2 Downloading the user program
If read back of the parameters is confirmed with "OK" then the latest S7 program is downloaded
in full to the AS following the read back.
Work can continue with compiling and downloading changes as soon as the AS is in RUN
mode again.
Comparing Time Stamps
To check whether the AS has downloaded with the current configuration status you can run
the "Compare time stamp" function in the CFC Editor via "PLC > Compare".
The program currently configured has been downloaded if the time stamp of the last
compilation is the same as the time stamp of the program downloaded and the time stamp of
the last download-related change is dated before the two other time stamps.
An easier check can be made directly via the symbol for the chart folder of the component
view. If a small arrow is shown there in the symbol then the current configuration has not been
downloaded.
Auto-archiving after successful download
In PCS 7 version V8.1, the "Auto-archiving" function is available to you in the "Download to
target system" dialog box. Archiving is performed automatically after downloading by activating
the "Archive project after successful download" option. The option can only be activated if a
versioned project was selected via the "Browse versioned project" button.
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Compendium Part A - Configuration Guidelines (V8.2)
Configuration Manual, 08/2016, A5E38166869-AA