Siemens Simatic PCS 7 Function Manual page 222

Failure, switchover and reintegration of high availability components
7.10 Guide to updating a redundant OS in runtime
Phase
Phase 1:
Updating Serv‐
er_2
Phase 2:
Update the OS
clients
that are
interconnected
on
Server_2
Phase 3:
Downloading
the connections,
gateways, and
changes
to the AS
222
Step
1. Server_2: Deactivate and exit WinCC
2. Server_2:
Back up the PCS 7 project
Back up the operating system and the PCS 7 software installation
3. Server_2: Install or update the operating system, PCS 7 Installation "OS server"
4. Server_2: If you want to use secure communication after the software update:
Activate "Secure communication" with migration mode. You can find information
about this in the documentation
Configuration .
5. ES: Download OS connection data and target system
6. Server_2: Start WinCC
7. Server_2: Check and save the "Redundancy" dialog box
8. Server_2: Check and save the "Time Synchronization" dialog box
9. Client_2: Deactivate process mode and exit WinCC
10. Server_2: Activate WinCC Runtime
11. Other redundant OS server pairs:
Perform Phase 1: Steps 1 to 9
1. Client _2:
Back up the PCS 7 project
Back up the operating system and of the PCS 7 software installation
2. Client _2: Install or update the operating system, PCS 7 Installation "OS client"
3. Client _2: If you want to use secure communication after the software update:
Activate "Secure communication" with migration mode. You can find information
about this in the documentation
Configuration.
4. ES: Download to OS target system
5. Client _2: Activate
1. ES: Download connections and gateways from NetPro to the AS
2. ES: Download CFC charts to the AS
Process Control System PCS 7; PCS 7 PC
Process Control System PCS 7; PCS 7 PC
High Availability Process Control Systems (V9.0)
Function Manual, 05/2017, A5E39221836-AA