Sequence when loading redundant OS servers with "Changes-only download" function
The "Changes-only download" function of a redundant OS server is only available if both
partner stations are in process mode (runtime).
For safety reasons, downloading is not performed to a redundant OS server pair at the same
time:
● The OS server with the configured application "WinCC Appl. (stby)" is downloaded first.
● Once the downloading of the OS server with the configured application "WinCC Appl. (stby)"
has been successfully completed, the partner station with the configured application
"WinCC Appl." will be downloaded.
Additional information
● Configuration manual
Process Control System PCS 7; Operator Station
● Online help for
STEP 7
5.5.11 Evaluating the redundancy tag "@RM_MASTER" with scripts
Recommendation
If you decide to evaluate the "@RM_MASTER" tag with scripts, you should program an
operator button that can deactivate this part of the scripts. This way, you do not have to change
and reload scripts each time the software is updated.
Advantages of high availability components
5.5 Operator stations
High Availability Process Control Systems (V9.0)
Function Manual, 05/2017, A5E39221836-AA 169
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