Configuration
4.5 Time-of-day synchronization
CP 154xSP-1
Operating Instructions, 12/2019, C79000-G8976-C426-05
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4.4.3
Access to the Web server
Access to the Web server of the CPU
The Web server is located in the CPU. Via the CP, you have access to the Web server of the
CPU.
From a PC you can access the Web server of the station if the PC is connected to the
system network via LAN.
You will find information on the Web server of the ET 200SP in the manual /2/ (Page 114).
4.5
Time-of-day synchronization
Note
Recommendation for setting the time
With Ethernet connections, synchronization with an external clock is recommended at
intervals of approximately 10 seconds. This achieves as small a deviation as possible
between the internal time and the UTC time.
Note
Consistent time-of-day synchronization via NTP / NTP (secure)
Up to firmware version V2.0 of the CP, both the CPU and CP can have the time of day
synchronized using NTP. In this case, only have the time of day of the station from an
external time source synchronized by a single module of the station so that a consistent time
of day is maintained within the station. If you do enable time-of-day synchronization for both
modules, use the same NTP server, if possible, in order to retain a consistent time of day
within the station.
As of firmware version V2.1 of the CP, only 1 module in the station can be time client. This
module distributes the time of day within the station.
