Orcad X Presto 23.1 : TH pads without pin number

Question

On the footprint editor of Orcad X Presto, I would like to add thermal vias on the power shape of a component. 
 But I don't want to have pin numbers that are linked to the electrical symbol of the component. 
 Is there a way to do that ? 
 
 For now, if I have more pins on the footprint than the number of electrical pins on the symbol, I have an error message on OrCAD X Capture.

John T · Answer

Hi SamTronic, yes I can provide a solution. Vias can be added at the footprint level ( dra file) directly without the need for numbered pins. To do this you should first define the vias allowed for use in your design. To do this open the Footprint in Presto and go to menu: Tools>Constraint Manager (CM). 
 In the Physical Worksheet, navigate to the Vias column. This is where we can define the list of vias allowed. The box indicated here is empty because there are no vias defined. Click on this empty box to add some: 
 
 You will be presented with the Edit Via List window. Use the text filter to search for known via names that you have previously created in your library. Just click on the preferred via (or vias) to transfer them from left to right into the Via List. Make sure to click OK to finalise. 
 
 Once you close the CM window, It is possible to now drop vias while in trace Add Connect mode. Optionally, you could add via arrays like I have done below as an illustration. 
 
 Don't worry about netnames for now. Once this footprint is placed in the board design, the shapes and vias will all take on the netnames of those assigned to the component pins imported from your schematic. 
 Let us know if this helps you!

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Orcad X Presto 23.1 : TH pads without pin number

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