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      <div class="title_topic3" id="xps10_pagetitle">Logical diagramming overview</div>
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               <p class="para_td">Overview</p>
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               <p class="para_td"><a class="links" href="javascript:void(0)" onclick="top.openFile('routingtools/logical_features.html');return(false);">Options</a></p>
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               <p class="para_td"><a class="links" href="javascript:void(0)" onclick="top.openFile('routingtools/electrical_scheme.html');return(false);">Related Topics</a></p>
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      <p class="para_topic">Routing Logical is an extension of Routing , which itself is an extension of the NX product. All modeling, drafting, and assembly operations are available (with proper licensing). The same tools provided by Routing, which include intelligent part placement, advanced path creation techniques, design rule processing, parts list generation, and complete customization options, are available for Routing Logical.</p>
      <p class="para_topic">Routing Logical provides the tools to make diagrams in an NX part file. The tools are mostly the same tools used in Routing Mechanical to place components and create the paths connecting those components. The difference is that in Routing Logical the parts are 2D Symbols and the connections are simple lines rather than solid bodies.</p>
      <p class="para_topic">The term P&amp;ID refers to the creation of diagrams to communicate the logical structure of piping and tubing systems. &nbsp;P&amp;ID most correctly stands for <b class="uiTerm">Process and Instrumentation Diagramming</b>, but is also used as <b class="uiTerm">Piping and Instrumentation Diagramming</b>.
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      <p class="para_topic">The creation of diagrams to represent a routing system exists in areas aside from piping or process design. Routing offers capabilities necessary to design practically any type of system that contains fluid, gas, or electrical flow. The narrow meaning of P&amp;ID is therefore too restrictive for a diagramming package intended to support all fields of design that NX Routing supports.</p>
      <p class="para_topic">The new product that supports the creation of P&amp;ID drawings is named Routing LogicalThis name allows this versatile application to be applied to any area in which a two dimensional diagrams are needed. The product is introduced as an add-on to Routing Mechanical.</p>
      <p class="para_topic">Until this product came into existence, the comparison of a logical diagram with a three dimensional model was, to a greater or lesser degree, a manual process. The range of methods of comparison included none at all, visually comparing a 2D drawing with a 3D drawing, visually comparing a 2D drawing with an on-screen 3D Model, and comparing a list of critical components contained in the diagram with a list of components generated from the 3D model.&nbsp;To varying degrees, these methods are time consuming and error prone. Managing any changes in the design is difficult using such methods.</p>
      <p class="para_topic">The integration of Routing Mechanical and Routing Logical provides automatic comparison between the two designs. The two NX assemblies are compared directly, without intermediate files. Instantly you know if something is missing or is extra in one design compared to the other. Operations to simplify the modification of a design to make it match the design being compared to are included.&nbsp;This is true in any direction, comparing; 2D to 3D, 3D to 2D, 2D to 2D, or 3D to 3D.</p>
      <div class="title_division">Access</div>
      <p class="para_division">Routing Logical is a sub-module of Routing Mechanical. You do not need a separate license for Routing Logical.</p>
      <p class="para_division">You can access Routing Logical from the is an option on the main <b class="uiTerm">Start&rarr;All Applications&rarr;Routing Logical</b>. Depending on your site set up, Routing Logical may share folders and files with Routing Mechanical.
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      <div class="title_division">Symbol libraries</div>
      <p class="para_division">Routing Logical provides examples of diagramming symbols only. These examples do not adhere to any given standard. The software is designed such that any system of diagramming can be used, given the proper set up.&nbsp;Many symbols of different standards are available in neutral formats that can be imported into the NX system and the necessary intelligence added.</p>
      <p class="para_division">Routing Logical uses the same data to select symbols as the Routing Mechanical module uses to select parts. If a symbol is fully defined in a diagram, the existence of a corresponding 3D part is virtually guaranteed. If complete part information is not available for the diagram, universal symbols may be used, with as much information as is available attached to the symbol.&nbsp;The choices offered to the 3D designer when selecting a suitable corresponding 3D part are then limited to those parts that agree with the information provided by the 2D diagram symbol. For example, if a gate valve symbol carries only the information that NPS = 20, the 3D user is offered only those gate valves that have NPS=20. If, on the other hand, the 2D diagram fully defines the gate valve, including the part number, then only that specific part is selectable for placement into the 3D assembly.</p>
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