Using Wiring Rules

AVEVA Instrumentation uses 'Wiring Rules' to automatically generate typical field instrument wiring/cabling. Using the Wiring Rules features can save many hours otherwise required to build devices and their associated terminal arrangements, cables, terminations . in Wiring Manager.

When a Wiring Rule is applied to a field instrument, the following are defined:

• Terminal arrangements - the number of terminals, their markings, sequence.

• Default wire numbers to be used on wire terminations.

• Default cable types - type of cable (individual cores, pairs or triad), whether shielded/screened, and whether armoured .

• Default cable numbers - based of the instruments tag number fields from Instrument Engineer.

• Default wire terminations at the field devices - how the cable is connected to the field device terminals (core 1 to terminal 1, core 2 to terminal 2).

• Default wire terminations at non-field device - how the cable is connected at the other end.

When wiring based on a Wiring Rule is created, AVEVA Instrumentation creates all the above automatically. Prior to saving this data AVEVA Instrumentation also enables users to:

• Change the default cable number created by the Wiring Rule.

• Select equipment the cable will terminate to at the other end (from a list of Junction Boxes, Cabinets).

After accepting defaults (or making changes as required) the Field Device and terminals are created, the cable is created and terminated at both ends (if equipment has been selected at the other end). At the other end, AVEVA Instrumentation always uses the next available spare terminals.

At any time after a Wiring rule is applied, the data that has been generated can be edited by:

• Re-running the Create Wiring command using same Wiring Rule - this enables users to reassign a Cable No, reassign a Junction Box .

• Re-running the Create Wiring command using a new Wiring Rule - this updates terminal arrangements, cable type, terminations and enables users to reassign a Cable No, reassign a Junction Box .

• Edit the cable details/type using the Cable Schedule user interface.

• Edit terminations using the Terminations user interface.

Wiring Rules can be assigned to tags and data generated from:

• Wiring Manager's Equipment View (right-click on a Junction Box and click Junction Box Allocations). Refer to Global tab.

• Wiring Manager's Equipment View (right-click on a Field Device and click Create Wiring). Refer to Global tab.

• Wiring Manager's Equipment List (right-click on a Field Device and click Create Wiring). Refer to Global tab.

• Wiring Manager's Cable Block Diagrams interface (right-click on a Junction Box and click Junction Box Allocations). Refer to Global tab.

• Instrument Engineer's Instrument Detail window. Refer to Instrument Engineer documentation.

• Instrument Engineer's Loop Detail window. Refer to Instrument Engineer documentation.

Wiring Rules can be modified or new rules created by a user. Refer to Wiring Rule Definitions.