Siemens SIMATIC PCS 7 Function Manual page 228

Failure, Switchover and Return of Fault-tolerant Components
6.12 Guide to updating a redundant Route Control server in runtime
Default Master
8. Start RC server (or WinCC Runtime) – starts as
standby (you may have to update the project)
9. New version – Runtime (standby)
: Default master or standby refers to the current state of the server pair before the software update in runtime. Any
(1)
redundancy switching is not necessary.
: V7.x. SPx means Route Control V7.0 or V7.1, possibly with Service Pack.
(2)
Additional information
● Programming and Operating Manual
Route Control; section "Software update."
228
(1)
Default Standby
(1)
New version – Runtime
The database is read.
New version – Runtime
SIMATIC Process Control System PCS 7; SIMATIC
Fault-tolerant Process Control Systems (V8.1)
Function Manual, 11/2014, A5E34878832-AA