Siemens SIMATIC PCS 7 Service Manual page 63

Updating the PCS 7 OS during running operation offers the following benefits:
● Operation of the PCS 7 system is not disrupted.
● The AS does not enter STOP mode.
● The automation process can still be operator controlled and monitored.
Updating a redundant OS during operation
You can find more information about this in the documentation
7; Fault-tolerant Process Control Systems, Guide to Updating a Redundant OS During
Operation.
Service Support and Diagnostics (V8.2)
Service Manual, 03/2016, A5E36200111-AA
Ensuring Availability
3.7 Updating the PCS 7 OS in runtime
Process Control System PCS
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