The system behaves as follows:
● The WinCC client connects to the upgraded Server2.
●
Server2 remains the standby server.
16. Other WinCC clients: Execute Steps 10 to 15
For WinCC Client1, the same procedure applies as for WinCC Client2.
When a WinCC client has been upgraded, repeat steps 10 to 15 for the next WinCC client until
all the WinCC clients in the system have been upgraded.
After the upgrade, also enter Server2 as the preferred server for WinCC Client1.
Complete the upgrading of one WinCC client before beginning with the upgrading of the next
WinCC client.
Result of Phase 2
● Upgraded WinCC Client2 is connected to the upgraded Server2 as the preferred server.
● Upgraded WinCC Client1 is connected to Server2 as preferred server.
● Server1 is the master server with the previous WinCC version.
● Upgraded Server2 is the standby server in the migrated project with the new WinCC version.
5.9.5 Phase 3: Upgrading Master Server
Introduction
In Phase 3, the master server Server1 is upgraded.
While carrying out the working steps in Phase 3, the system runs on just one server. The
system can be operated via the WinCC clients upgraded in Phase 2. Further information on
redundancy synchronization is available in the WinCC Information System under the topic
"Configurations > Redundant Systems".
Note
If necessary, create a backup copy before upgrading the server.
Initial Situation Prior to Phase 3
● Server1 is the master server with the previous WinCC version.
●
Upgraded Server2 is the standby server in the migrated project with the new WinCC version.
● The redundancy synchronization of Server1 and Server2 is complete.
Migration
5.9 Upgrading a Redundant System in Normal Operation
WinCC: General information and installation
System Manual, 02/2017, A5E40840020-AA 157
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