Phase 4 / 6. Client_1: Select the operability of the clients
Options:
● If all clients should remain operable, set the preferred server for Client_1 to Server_2.
Client_1 is operable after you have completed Phase 4. After having updated Server_1 in
Phase 5, change the server setting for Client_1 to preferred server = Server_1.
● If you do not need Client _1 to be operable during the software update, the preferred server
for Client _1 does not have to be changed.
The system reacts as follows:
● Client_1 is connected to Server_2 or deactivated.
Result after Phase 4
● 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 updated (deactivated or connected to Server_2).
● OS Client_2 is interconnected with its preferred Server_2.
7.10.7 Phase 5: Updating Server_1
Introduction
While you perform the steps in phase 5, your system runs only with Server_2. The system
remains controlled from the OS clients that were updated in phases 2 and 4.
CAUTION
Interrupted redundancy
Perform the steps without extended interruptions because the redundancy is not available
during the update.
Initial situation before phase 5
● 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 updated (deactivated or connected to Server_2).
● OS Client_2 is interconnected with its preferred Server_2.
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)
232 Function Manual, 05/2017, A5E39221836-AA
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