Siemens SIMATIC PCS 7 Function Manual page 200

Failure, Switchover and Return of Fault-tolerant Components
6.10 Guidelines for updating a redundant OS in runtime
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
Phase 2 / 2. Client_2: Installation of the operating system, PCS 7 Installation "OS client"
● Install or update the operating system (information is available in the manual
● Install the necessary PCS 7 components.
● Make the necessary settings.
Note that Windows administration of PC stations should be performed by a Windows
administrator. You can find a detailed description of the PCS 7 installation and the required
PCS 7-specific settings for PC stations in the manual
Configuration and Authorization .
Phase 2 / 3. ES: Download to OS target system
● Right-click on the OS to be transferred in the open PCS 7 project below the WinCC
Phase 2 / 4: Client_2: Activate
● Start WinCC on Client_2.
● Activate WinCC Runtime.
The system reacts as follows:
● Client_2 connects with the upgraded Server_2.
Result after 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.
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current PCS 7 project as a fallback strategy.
Control System PCS 7; PC Configuration and Authorization ).
An OS client can only run on an operating system which has been released for PCS 7. You
can find additional information on this in the
Readme documentation.
In the PCS 7 Setup, select the "OS Client" check box in the "Program Packages" dialog
box.
application. Select the menu command PLC > Download in the shortcut menu. This
downloads the project for Client_2 from the ES to the relevant OS.
Process Control System PCS 7; PCS 7
Process Control System PCS 7; PC
Fault-tolerant Process Control Systems (V8.0)
Function Manual, 03/2012, A5E02779471-02
Process