The following content has been imported from Legacy Help systems and is in the process of being checked for accuracy.
Parent process: EditConstraints:AddConstraint
Applied parameters: Type=PCB
Summary
This command is used to add or modify a constraint group targeting a specific PCB project, within the active constraint file.
Details
First, ensure that the constraint file whose PCB constraint group you wish to add or modify, is open as the active view in the main design window.
After launching the command, the
Select Sub Project dialog will appear. Use this dialog to browse to and open the particular PCB project you wish the current constraint file to target (or a different PCB project if one is already targeted in the file).
If you are adding the PCB constraint group to the file, clicking
Open after you have chosen the project you wish to target will close the dialog and add the constraint group statement to the constraint file. The statement will appear in the following form:
Record=Constraint | TargetKind=PCB | TargetId=[Chosen PCB Project] (e.g. Peak Detector - Multi channel.PrjPcb)
If you are modifying an existing PCB constraint group, clicking
Open after you have chosen the substitute PCB project will close the dialog and the corresponding constraint group statement will be updated with the new project.
Notes
A constraint group is a single statement in a constraint file, targeting one or more objects and containing one or more specific constraints.
A constraint file can only target one PCB project.
When adding the PCB constraint group for the first time, the entry will appear below any other constraint group statements, where they exist, otherwise it will be the first statement following the header section of the file.
When modifying an existing PCB constraint group, the text cursor can be placed anywhere within the document - you do not have to place the cursor within the relevant line for the statement.
The PCB constraint group can be added/modified by typing directly within the constraint file.
For more information about constraint files, refer to the application note 'Design Portability, Configurations and Constraints' and the 'Constraint File Reference', both of which can be found in the main FPGA Design section of the Help System.