Siemens SIMATIC HMI Series System Manual page 159

The system behaves as follows:
● Server1 becomes the standby server.
● Archive synchronization is performed for the message archives, process value archives
and user archives.
● If system messages have been configured, a corresponding process control message is
generated.
● All the values during the downtime period are synchronized.
22. WinCC Client1: Loading Packages and Configuring the Preferred Server
Load the Server1 package to the WinCC clients.
Configure Server1 as the preferred server for WinCC Client1.
Deactivate and activate the respective client to apply the changed configuration to the preferred
server.
● The WinCC Client1 connects to the upgraded preferred server, Server1.
23. WinCC Client2: Loading Packages and Configuring the Preferred Server
Load the Server1 package to the WinCC clients.
Configure Server2 as the preferred server for WinCC Client2.
Deactivate and activate the respective client to apply the changed configuration to the preferred
server.
● The WinCC Client2 connects to the master server, Server2.
24. Other redundant server pairs: Execute Steps 17 to 23
If several redundant server pairs are implemented, then upgrade the master server, Server_1.
Execute steps 17 through 23 for each Server1.
Complete the upgrading of one server before beginning with the upgrading of the next server.
Result of Phase 3
● Upgraded Server1 is the standby server.
● Upgraded Server2 is the master server.
● Upgraded WinCC Client1 is connected to its preferred server Server1.
● Upgraded WinCC Client2 is connected to its preferred server Server2.
WinCC: General information and installation
System Manual, 02/2017, A5E40840020-AA
5.9 Upgrading a Redundant System in Normal Operation
Migration
159