Siemens LOGO! CMK2000 Operating Instructions Manual page 43

Date and time synchronization
Two mechanisms are available for date and time synchronization:
● Synchronization of the time used in the KNX network with the time of the LOGO! 8.
● Synchronization of the time used in the LOGO! 8 with the time in the KNX network.
Note
• The CMK2000 does not have a real-time clock. Depending on the parameterized
time/synchronization mechanism, the device fetches the time cyclically from the LOGO!
or from the KNX network and passes it on to the respective other side.
• An unchanged transfer of the date only occurs between 1.1.2000 and 31.12.2089.
Parameter assignment options:
● No synchronization (default)
● KNX specifies the time and date
The settings for time synchronization made in the LOGO! are ignored.
● LOGO! specifies the time and date
Synchronization of the time used in the LOGO! 8 with the time in the KNX network.
●
● Following return of bus voltage
● Cyclically every hour
● Upon change in time
Note
The settings in LOGO! Soft Comfort with respect to date/time synchronization are made
independently of synchronization via KNX. In the event of an unfavorable configuration, both
time/date synchronization mechanisms act on the LOGO!.
CMK2000
Operating Instructions, 11/2015, A5E34877550B/001
Following device start from CMK2000 or LOGO!
Configuring and commissioning using ETS
8.4 General parameter assignments
43