Technical data

Configuring time synchronization

5.5 Configuring the time synchronization of the OS

Time synchronization (V7.1)

Function Manual, 03/2009, A5E01216578-01

Result

The communication module can send and receive the time message frames. The OS

servers are cooperative time masters. If a communications processor (CP1613, CP 1623)

does not receive a time signal on the plant bus, WinCC time synchronization automatically

switches to master mode. It will then send substitute time signals for the failed time master.

CAUTION

If a time jump of more than 5 seconds occurs, the computer defined as the time master

becomes a time slave. The message "Time synchronization has been permanently

switched to slave" is generated.

Note that also after a restart this computer is no longer defined as time master. Reconfigure

the computer as time master and load the configuration on the computer.