Phase 2: Updating Os Clients Interconnected With Server_2 - Siemens SIMATIC PCS 7 Function Manual

6.10.4

Phase 2: Updating OS clients interconnected with Server_2

Introduction
In Phase 2, you update the OS clients that were interconnected with Server_2.
The system can be controlled at all times using Client_1, which is interconnected with the not-
yet-updated Server_1.
The same PCS 7 version is running on the active OS server Server_1 and on Client_1. Mixed
operation between OS clients and OS servers of different PCS 7 versions is not possible.
Archive data and messages that have accrued on OS server Server_1 during the update
process are available on both OS servers. Synchronization of the archives is complete with
the following message: "REDRT: <Name of the OS server> complete".
Interrupted redundancy
Perform the steps without extended interruptions because the redundancy is not available
during the update.
Initial situation before phase 2
● 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.
● Client_2 is either deactivated or interconnected with Server_1 after you have changed the
preferred server setting. Client_2 cannot access the upgraded Server_2 as the preferred
server.
Requirement
The PCS 7 project you are updating has already been updated on the ES.
Procedure - Phase 2
Phase 2 / step 1. Client_2: Backup of the PCS 7 project, of the operating system and of the
PCS 7 software installation
● Back up your previous operating system, the previous PCS 7 software installation and your
current PCS 7 project as a fallback strategy.
Fault-tolerant Process Control Systems (V8.1)
Function Manual, 11/2014, A5E34878832-AA
CAUTION
Failure, Switchover and Return of Fault-tolerant Components
6.10 Guidelines for updating a redundant OS in runtime
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