The Hook-Ups folder of the Domain Explorer enables you to navigate to a hook-up type, hook-up, hook-up item, or instrument in a graphical way resembling the Windows Explorer. You can expand or collapse the levels to view the existing items. The Hook-Ups folder shows you at a glance the graphical representation of the relationships that exist among the hook-up types, hook-ups, and hook-up items, instruments, and child items associated with instruments.
The Hook-Ups folder employs an expandable/collapsible hierarchy that allows you to navigate to relevant items and select them for use. To perform an action, right-click a folder or an item and then select a command. Note that the software uses various icons beside a folder or item to indicate the status of a folder or an item, for example a view-only item, a claimed item, an item that belongs to As-Built, and so forth. For the full list of the item indicators, see Item Status Indicators in the Domain Explorer. For a detailed explanation of the Explorer tree view, see Working with the Domain Explorer:
The software arranges the items based on the relationship among them. The display rules follow a rigid structure of the following four levels.
Level 1: Hook-Up Types and Hook-Ups
This is the highest level in the Hook-Ups folder hierarchy. At this level, the software displays both all the hook-ups types
and hook-ups that exist in the current domain. Hook-up types are shown as 
and hook-ups as 
.
Hook-up types contain hook-ups for instruments sharing similar features, for example,
Control, Measure, Flow, and so forth. For each hook-up type, on the shortcut menu,
you can select New to add hook-ups. At this level, you can only create one hook-up at a time. Also,
you can move hook-ups from one hook-up type to another, assign instrument tags and
hook-up items. To assign tag numbers, on the shortcut menu, select Actions > Associate Tag Numbers with Hook-Ups. To assign hook-up items, on the shortcut menu, select Actions > Associate Items with Hook-Ups. Also, at this level, you can generate various hook-up reports, a Bill of Material,
and hook-up drawings.
Level 2: Hook-Ups
Hook-ups (shown as ) appear under hook-up types. At this level, you can create hook-ups in batch mode
by duplicating existing hook-ups you select. You can move hook-ups from one hook-up
type to another, assign instrument tags and hook-up items. To assign tag numbers,
on the shortcut menu, select Actions > Associate Tag Numbers with Hook-Ups. To assign hook-up items, on the shortcut menu, select Actions > Associate Items with Hook-Ups. Also, at this level, you can generate various hook-up reports, a Bill of Material,
and hook-up drawings.
Level 3: Hook-Up Items and Instruments
Hook-Up Items
Hook-up items (shown as 
) appear under hook-ups. Hook-up items do not contain child items. To assign hook-up
items to hook-ups, use a shortcut menu command available at the level of hook-ups
or hook-up types. You cannot create or delete hook-up items in the Domain Explorer. Hook-up item management options are only available in the Hook-Up Item Libraries folder of the Reference Explorer.
Instruments
Instruments (shown as
) appear under hook-ups. Instruments can contain document assigned to instrument
specs, process data, or calculation sheets. Also, instruments can contain control
system tags. You create documents and control system tags in the appropriate modules
of Smart Instrumentation. To assign instrument tag numbers to hook- ups, use the shortcut menu command available
at the first or second level of the folder hierarchy.
Level 4: Control System Tags, Documents, and Instrument Blocks
Control System Tag
Control system tags (shown as 
) appear under instruments at the lowest level of the Hook-Ups folder hierarchy. It is possible to assign control system tags to instruments when
performing I/O assignment.
Documents
Documents (shown as 
) appear under instruments at the lowest level of the folder hierarchy. You define
documents when creating specs, process data sheets, or calculation sheets. You can
modify or delete document data in the module pertaining to the document displayed.
For example, if you delete an instrument specification from the Specifications module,
the software automatically removes the document from the Hook-Ups folder. Use the shortcut menu command to open documents. The software opens the document
in the module in which the document was created.
Instrument Blocks
Instrument blocks are represented by icons 
and 
. In the Hook-Ups folder, instrument block options are not in use because they are only used in a CAD
loop drawing generation. You manage instrument blocks in the Loops folder.