AVEVA Global User Guide
Concepts : Networks and Communication Links
The communications network must be a tree structure, which means that there is a unique path between one location and another. The Hub is the root of the tree. It is possible to have links between one satellite and another, using Location Groups ‑ in this case there is more than one path between locations. Refer to Location Groups.
The following diagram shows some of the different configurations possible, when Groups are not used. For a diagram showing the use of Groups, refer to Location Groups.
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Figure 3:1.
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The relationship between locations is described in terms of a family tree: there are parents, children, ancestors and descendants. For example, in Figure 3:1.: Examples of tree structures for locations, the relationships between locations A, B, C, D and E are described as follows:
Every location except the Hub has a parent. The parent of each location is stored in the Global database. The parent-child relationships define the connectivity of the communications network, and allow the Global daemons to find the path from one location to another.
