Siemens LOGO! CMR2040 Operating Instructions Manual page 73

Methods and requirements
The following requirements must be met for the various methods of time-of-day
synchronization:
● NTP
– The CMR is connected to the mobile wireless network and the mobile wireless
– The option "Enable data service in the mobile wireless network" n the tab WAN >
– An antenna is connected.
– Reception is adequate.
● GPS
– GPS is enabled: System > General (Page 70)
– An antenna is connected.
– Reception is adequate.
● By mobile wireless network
– The service is supported by your mobile wireless provider. Check this with your mobile
– An antenna is connected.
– Reception is adequate.
With this method note that the time when the time of day is synchronized can be very
variable. The first time the device books into the mobile wireless network, the time of day
is transferred by the mobile wireless provider. After booking in, the intervals of the next
time-of-day synchronization points can deviate considerably depending on the mobile
wireless provider. Under certain circumstances the intervals may be several days.
Local time zone
● Select the time zone to match your location from the drop-down list.
You can also set the local time zone manually.
If you click the "Applyy" button, the settings you have made for the local time zone are
adopted.
● Automatic daylight saving time switchover
If you select the "Automatic daylight saving time switch" check box, the daylight saving
time switchover is performed automatically.
You can only change the date and time for the time-of-day switchover manually. In the
drop-down lists, you select the valid dates and times for the time switchover.
The settings are fixed for the UTC time zones and cannot be changed.
LOGO! CMR2020, LOGO! CMR2040
Operating Instructions, 10/2016, C79000-G8976-C356-03
interface is enabled.
The connection to the NTP server can only be established via the mobile wireless
interface and not via the Ethernet interface.
Mobile wireless settings (Page 87) is enabled.
wireless provider.
Configuration (WBM)
5.6 System
73