The left pane in the Diagnostics program displays a tree like view of the nodes (DeltaV Controllers and DeltaV workstations) and subsystems (Communications, I/O, Control, Alarms and Events, and so on) in your Control Network. At the top level of the tree is the Control Network; beneath the Control Network are the nodes; and beneath each node are the subsystems configured for that node. Each node can have one or more subsystems configured for it as shown below:
Use the plus sign (+) and minus sign (-) next to items to navigate through the hierarchy. A plus sign next to a node or subsystem means that more nodes or subsystems are below it in the hierarchy. Click the plus sign to expand the hierarchy. Continue to click the plus signs until you find the node or subsystem you are interested in. A minus sign (-) next to a node or subsystem means that the level is completely expanded.