Mira wrote: > > Thanks for the remark, Peter. > > I used "wires" and placed "net labels". It's amazing > that I'm allowed to place parts with one and the same > ref. designators. > OK. I placed a net label on the wire that had GND > power port connected expecting the name of the label > to change to GND but it didn't.
The power ports act something like net labels (but not _exactly_ like net labels - the power nets are always Global, while those created by net labels may be local to a single sheet, depending on how the netlist is generated.) > > The ERC caught both the duplicated net labels and the > duplicated parts. But when I updated the PCB the > duplicated net labels were not reported as a problem. > On the PCB I got this pin (with duplicated net) > connected to the name of the label (not to GND). > When I move the net label aside, the pin is connected > to GND. > So far so good. Lets think this is a feature. It is important to fix any errors reported by ERC before going to the PCB (or, at least to know why ERC is complaining, and be willing to accept the results...) > > I decided to check what will happen if I place a net > label on top of two wires, which are crossing each > other but not connected. They didn't have any other > labels placed. ERC didn't catch it and the update PCB > didn't complain either. It just shorted those two > wires while on the schematic they are visibly not > connected. > Is this another feature? How may I prevent designers > for shorting nets this way? I'd be more likely to call it a bug (although it is really an undesired byproduct of a feature). A net label applies to any wire which touches its bottom left corner, so you can put a horizontal label on a vertical wire - but this feature can lead to the problem you describe. > Is there any way to prevent Protel from placing > duplicated ref. designators? I initially place parts leaving the designator as R?, C?, U?, etc., then use "Tools/Annotate" to automagically assign numbers to all "?" parts. For parts that you want a specific designator, you can set those as required, and the Annotate function will only affect those parts that still show a "?". Later, when I have the board finished, I usually reannotate the PC board, then back-annotate the schematic to match. -- Peter Bennett TRIUMF 4004 Wesbrook Mall, Vancouver, BC, Canada GPS and NMEA info and programs: http://vancouver-webpages.com/peter/index.html * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/[email protected] * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
