Siemens SIMATIC LOGO! CMR2020 Operating Instructions Manual page 61

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● Using the "Update interval" drop-down list, you specify the intervals at which the time is
synchronized using the selected time-of-day synchronization method.
If you synchronize the time of day via the GSM/LTE mobile wireless network, you cannot
specify an update interval.
● By selecting the "Forward time of day to LOGO! BM", the time of day is forwarded to the
BM at the intervals you have set.
If the time of day is synchronized via a mobile wireless network, the time of day is
forwarded as soon as a new time of day is received by the CMR. The time of day is also
transferred when establishing the connection to the BM.
Note
Avoid having different settings on the BM and CMR
If you have different settings on the BM and CMR and want to avoid time deviations
resulting from this, you need to enable time-of-day forwarding to the BM:
1. Make sure that you have disabled the automatic daylight saving time switchover on
2. Select the "Forward time of day to LOGO! BM" check box.
The "Time of the last time-of-day synchronization" display box shows when the time of day
was last synchronized successfully.
"Apply" button
If you click the "Apply" button, time-of-day synchronization is started if the parameters have
been changed.
Note
The time of day is reset during a restart. To have the current time, you always need to use a
time-of-day synchronization method.
Setting the system time manually
You can get the system time for the CMR from your PC or enter it manually.
● Click the "Apply PC time" button: The time is read from the PC and written to the CMR.
● Manual entry: Enter the system time in the "New system time" input box.
– By clicking the "Apply new system time" button, the time is written to the CMR.
LOGO! CMR2020 / LOGO! CMR2040
Operating Instructions, 09/2014, C79000-G8976-C356-01
the BM.
This avoids having different settings and resulting time deviations in LOGO! BM and
LOGO! CMR.
Configuration
6.4 System
61

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