Siemens LOGO! CMR2040 Operating Instructions Manual page 27

You set the method used for time-of-day synchronization via the WBM in the "System" tab,
see section System Time (Page 72).
You can also have the CMR adopt the time of the configuration PC.
Forwarding time to the BM
If you enable the time of day in the WBM, you can also make a setting in the WBM so that
the CMR also synchronizes the BM with the time of day (time-of-day forwarding). To do this
enable enable "Forward time of day to LOGO! BM".
Even if time-of-day synchronization is disabled, the time of day is forwarded to the LOGO!
BM . In this case, only the manual settings are transferred to the LOGO! BM .
Note
If you use time synchronization of the BM via the CMR, activate the standard/daylight saving
changeover on the BM to ensure a consistent time.
The following figure provides an overview:
Figure 1-6
LOGO! CMR2020, LOGO! CMR2040
Operating Instructions, 10/2016, C79000-G8976-C356-03
Time-of-day synchronization
Application and functions
1.4 Application examples
27