Siemens SIMATIC PCS 7 Configuration Manual page 76

Creating and managing a PCS 7 project
5.6 Creating the plant hierarchy
Making the AS assignment
The object properties of a hierarchy folder play an important role in this regard. Using the
"reactor1" folder as an example: On the "AS-OS Assignment" tab, assign the "reactor1" folder
an automation system as a technical plant from the component view. In this case the charts
from station "AS1_H" are assigned.
Each hierarchy folder then has an AS assigned as a technical plant, unit, or function in which
the charts run after being downloaded.
All elements which you add to the hierarchy folder will be assigned to this AS. If you transfer
the selected assignments to lower-level objects, the subordinate hierarchy folders adopt the
same AS assignment. You can recognize this by the note "All lower-level objects have the
selected assignment."
Synchronizing the PH
The PH of the "20_OS" project with the two OS server stations is generated by synchronizing
the PH from the two projects for the automation systems.
To do this, use the command "Plant Hierarchy > Update in Multiproject".
Note
Additional information on this is available in the "SIMATIC Process Control System PCS 7 -
Engineering System" (https://support.industry.siemens.com/cs/ww/en/view/109485969)
manual.
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Compendium Part A - Configuration Guidelines (V8.2)
Configuration Manual, 08/2016, A5E38166869-AA