Siemens SIMATIC PCS 7 Function Manual page 194

Failure, Switchover and Return of Fault-tolerant Components
6.10 Guidelines for updating a redundant OS in runtime
Initial situation
● Server_1 is master server.
● Server_2 is standby server.
● Client_1 is connected to Server_1 because this server is configured as its preferred server.
● Client_2 is connected to Server_2 because this server is configured as its preferred server.
Requirements
● Process Mode of the Maintenance Client was ended before the ES was updated.
● The update of the PCS 7 project for the ES is complete.
● If the Maintenance Station is used, SIMATIC PDM is installed on the ES.
● All the settings for the configured mode have been made. The configuration data has been
● All OS servers and all OS clients are running with PCS 7 V7.1.3. or higher.
Overview of the required tasks
CAUTION
Perform the steps described from Phase 1 to Phase 5 without extended interruptions because
the redundancy is not available during the update.
194
Client_1 represents all OS clients connected to Server_1.
Client_2 represents all OS clients connected to Server_2.
loaded onto the ES from NetPro.
Fault-tolerant Process Control Systems (V8.0)
Function Manual, 03/2012, A5E02779471-02