If there was no download to the AS during the project update, you now need to download to
the AS.
● Select an AS in SIMATIC Manager.
● Select the menu command PLC > Download.
● Select the "Changes only" check box.
Note
If you select the "Include user data blocks" check box, the user data blocks on the AS are
overwritten. You can find additional information in the online help for the "S7 Download"
dialog box.
● Close the dialog box by clicking "OK".
Repeat the steps for downloading to the AS for each AS in the project.
The system reacts as follows:
● The system can be controlled and monitored from all clients.
Result after Phase 3
● Server_1 is master server in the PCS 7 project.
● The updated Server_2 is standby server in the updated PCS 7 project.
● Client_1 is connected to Server_1.
● Updated Client_2 is connected to its preferred server Server_2.
● The system can be controlled from all OS clients.
7.10.6 Phase 4: Updating OS clients interconnected to Server_1
Introduction
In Phase 4, you update the OS clients that are interconnected with Server_1.
The system can be controlled at all times using Client_2, which is interconnected with Server_2.
CAUTION
Interrupted redundancy
Perform the steps without extended interruptions because the redundancy is not available
during the update.
Failure, switchover and reintegration of high availability components
7.10 Guide to updating a redundant OS in runtime
High Availability Process Control Systems (V9.0)
230 Function Manual, 05/2017, A5E39221836-AA
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