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.
Compiling and downloading
9.2 Downloading the user program
Compendium Part A - Configuration Guidelines (V8.2)
190 Configuration Manual, 08/2016, A5E38166869-AA