Technical data

Configuring time synchronization
5.4 Commissioning a central plant clock
Time synchronization (V7.1)
66 Function Manual, 03/2009, A5E01216578-01
5.4.3 Commissioning GPS receivers
Introduction
The GPS receiver determines the UTC via the satellite-based GPS system (Global
Positioning system). Due to the country-specific installation of Windows on the OS the sent
UTC is converted to the time valid in the respective country. For reception of the precise time
reception of the signal from one of the 24 satellites suffices. The GPS receiver also enables
worldwide use of SIMATIC PCS 7 with inter-plant time synchronization.
Overview of commissioning tasks
The table below shows the commissioning tasks that are needed to connect a GPS receiver
to a central plant clock for the purpose of time synchronization within the context of a PCS 7
plant:
Step What?
1 First commissioning of the GPS receiver
Configure the GPS receiver with the aid of the associated commissioning software.
2 Connect the GPS receiver cable
3 Align the GPS antenna
"DCF 77 reception service" software
The "DCF 77 reception service" software is supplied together with the SICLOCK TM/TS. You
will need the "DCF 77 reception service" software in the following scenarios:
● When connecting the SICLOCK TM/TS to a domain controller
If you are using the SICLOCK TC 400, the DCF 77 reception service will not be required.
● When connecting a DCF 77 receiver directly to a PC station
You will find additional information on this topic in Section "
Configuring directly connected
time receivers (Page
96)".