Technical data

Configuring time synchronization
5.12 Configuring redundant PCS 7 systems
Time synchronization (V7.1)
122 Function Manual, 03/2009, A5E01216578-01
5.12 Configuring redundant PCS 7 systems
5.12.1 How to configure time synchronization of OS servers with a redundant
communication module and external clock
Introduction
The described configuration is based on redundant OS servers on a redundant plant bus.
Requirements
● Each OS server in a server pair must feature redundant communication modules.
Possible types:
– Two CP 1613 each
– Two CP 1623 each
● The central plant clock must take the form of the SICLOCK TC 400 or SICLOCK TM.
● WinCC Explorer must be open on one of the OS servers.
Procedure
To synchronize the time on a redundant OS with external clock, follow these steps:
1. Open the OS server in the PCS 7 project on the engineering station.
2. Select the "Time synchronization" editor from the tree view of WinCC Explorer.
3. Select Open from the shortcut menu.
The "Time Synchronization" dialog box opens.
4. Select the "Synchronization via plant bus (master, slave)" check box.
5. From the "Access point 1" drop-down list box, select the communication module for which
you have activated time synchronization in the configuration console. The drop-down list
box shows all installed devices that are suitable for time synchronization.
6. Select the "Master" option button.
This defines the OS server as time master.
7. Select the redundant communication module required from the "Access point 2" drop-
down list box.
8. Activate the "Master" option button.
This specifies a redundant communication module for time synchronization, which
establishes the connection to the plant bus in the event of the first communication module
failing.
9. Click "OK".