11-23-2007 11:44 AM
11-26-2007 05:50 AM
Hello
I have tried to reproduce your problems. In the first instance I must agree the nature of multisim/ultiboard to unplace items when the details are changed is an annoying feature. This annoyance however can be minimized by the use of keep in/keep out areas and the autoplace and auto route functions. This alows boards to be replaced quickly and with minimum hassle while retaining shape design.
Your second issue was harder to reproduce as the details of your method and objectives were not totally clear. Does this problem still persist or have you worked around the software to reach a satisfactory solution?
Graham
11-26-2007 07:02 AM
11-26-2007 09:49 AM
Right, I think I have solved your problem. Thank you for your video it was most useful.
The method you were using to back annotate from Ultiboard to Multisim was correct and after playing with the problem I found the circuitry was also correct just unhelpfully displayed.
In the process of swapping the two terminals you removed one net completely (eg.pin 5) and then recreated it when you connected it to the other(eg. pin 6) . In this way the computer had the information of what each pin was to be connected to but not being as clever as a human it could not wire them neatly and obviously on the multisim display. If you look at the nets it creates you will notice they are named correctly and so virtually connected.
For example: pin 6 is labeled "VCC" and so is virtual connected to the digital ground, though this is not apparent just by looking. To the computer this is a satisfactory result though I would agree to the user it is most confusing. The program is still somewhat in its infancy and NI hope to smooth out these usability issues soon.
The circuit is technically correct however (as you can see in the log). I would recommend manually re-wired the nets as a visual aid to users of your circuit design in the future though this is not neccessary.
I hope this is helpful for you, any more questions you have I would be happy to look into.
Graham
11-26-2007 10:00 AM
11-26-2007 08:57 PM
I would like to add something to this that I tried when I first got Version 10. I was trying to reverse engineer a board (I am an electronics tech and sometimes this is the only to get a schematic for a board. I already had a schematic for this one and was just testing the backannote and forward annote feature). I entered the parts into Multisim exported it to Ultoboard. I placed them on the board and run the connection from my pictorial diagram of the board. I then backannoted this to Multisim. Like this poster pointed out alll the connections were made with virtual connections instead of normal wires. The thing that troubled me more was the fact that there was a multisection component (a 4011) that only connected on pins 1,2 and 3. The rest of the pins remained unconnected.
Has anyone experience this kinda situation and is it a known issue?
Note: I don't condone reverse engineering anyones work unless it is the only way to get a schematic and effect repairs.
11-26-2007 10:00 PM
11-27-2007 05:01 AM