I have a board file and schematic that are linked. There are 5 different schematics and layouts (already manufacturered) each are independant of each other but are on the same board with v-grooves cut between them. I want to create a new schematic and board each of which are individual instead of together on one board. This would not be a problem but I would like to be able to change the reference designators on the schematic without re-placing the components on the board file after I import the netlist.
Is this possible?
Go to file --.export palcement,generate a placement file ,open that file in excel replace old designators with new one and then import new placemant file after reloading the new netlist
Hope it works
I am assuming that you have 5 schematics and layouts which are being combined during fabrication toform one PCB which is Assembled as one unit. This means your reference designators are uniqueacross all of the different sections (layouts) on the main (combined) PCB. Now you are looking toupdate the layout and schematic so there is no gaps in the Reference Designator numbering when theboards are assembled individually.
You have a couple of options:
Option A Don't change the Reference Designators on the schematics but use Auto Rename in Allegro to rename the Reference Designators so there are no gaps in the numbering then back annotate the updated Reference Designators to the schematic.
Here are the steps: 1) Logic > Auto Rename RefDes > Rename, check Rename all components and click the MORE button. 2) Clear the Top and Bottom Layer Identifier, Skip Character(s) then check Preserve current prefixes 3) Click the CLOSE button on the Rename Ref Des Set Up form. 4) Click the RENAME button on the Rename RefDes form.
- This will rename the components so there are no gaps in the reference designators numbering. - Now you can back annotate the rename to the schematic and you are good to go.
Option B If you prefer to make the changes on the schematic, just keep track of the Reference Designators FROM->TO and generate a text file "was-is_board1.txt" with column 1 being the OLD RefDes and column 2 being the NEW RefDes as follows: U5 U1 U6 U2
This "was-is_board1.txt" text file can be used to rename the board prior to importing the single board netlist using the batch command REFTXT. Here is the command syntax that can be executed at a DOS Prompt as follows: reftext was-is_board1.txt combined_board.brd rename_board1.brd
- This will rename the components based on the "was-is_board1.txt" text file - Once complete you can import the single board netlist. Hope this helps,Mike Catrambone
Syntax error in command...
reftxt was-is_board1.txt combined_board.brd rename_board1.brd
reftext was-is_board1.txt combined_board.brd rename_board1.brd