Siemens SIMATIC LOGO! CMR2020 Operating Instructions Manual page 60

Configuration
6.4 System
Time-of-day synchronization method
Note
Time-of-day synchronization via a mobile wireless network
If you want to use the time-of-day synchronization via the mobile wireless network:
• Check whether this service is supported by your mobile wireless provider.
The intervals of time-of-day synchronization points can deviate considerably:
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 (up to several days) depending on the mobile wireless provider. Keep this in
mind if you select time-of-day synchronization via the mobile wireless network.
Time-of-day synchronization with GPS
If you select time-of-day synchronization using GPS, check the following:
• Whether or not GPS is active.
• Whether or not an antenna is connected.
• Whether or not GPS reception is adequate.
1. By selecting the "Activate time-of-day synchronization" check box, you enable time-of-day
synchronization.
2. Then select the required time-of-day synchronization method.
The time-of-day synchronization methods are available for selection in the "Time-of-day
synchronization method" drop-down list:
Time-of-day synchronization method
NTP
GPS
GSM/LTE
60
Meaning
Time-of-day synchronization by an NTP server (time server).
1. In the "IP address or DNS name of the NTP server" box, enter the
name of the NTP server or its IP address:
– The NTP server is specified in the familiar URL format, e.g.
http://www.ntpservername.de.
– The IP address is specified in the format 123.123.123.123.
2. In the "Mobile wireless settings", select the "Activate data connection
via the mobile wireless network (Page 80)" check box.
The connection to the NTP server can only be established via the
mobile wireless interface and not via the Ethernet interface.
Time of day from the GPS signal.
The time of day is taken from the GPS signal and adapted according to
the set time zone.
Make sure that a GPS antenna is connected and that reception is
•
ensured.
Time of day from your mobile wireless provider.
If your mobile wireless provider supports this service, the time of day is
taken directly from your mobile wireless provider. Make sure this is the
case before selecting this entry in the drop-down list.
Operating Instructions, 09/2014, C79000-G8976-C356-01
LOGO! CMR2020 / LOGO! CMR2040