Parent page: Schematic Objects
The No ERC object is a design directive. It is placed on a node in the circuit to suppress all reported Electrical Rule Check warnings and/or error violation conditions that are detected when the schematic project is compiled. Use No ERC to deliberately limit error checking at a certain point in the circuit that you know will generate a warning (such as an unconnected pin), while still performing a comprehensive check of the rest of the circuit.
The No ERC directive supports a number of different styles, and can be displayed in any color. Use this ability to reflect the design intent for this point in the circuit.
The No ERC directive has two modes of operation:
No ERC design directives are available for placement in the Schematic Editor only. To place a No ERC directive:
After launching the command, the cursor will change to a cross-hair and you will enter placement mode. Perform the following to place the No ERC directive:
Additional actions that can be performed during placement are:
A Specific No ERC directive targets a specific violation, so it must be configured to do this. To simplify this process, Altium Designer launches an interactive tool to automatically configure the directive to target the appropriate violation, during placement.
To use this interactive tool:
An alternative approach to using the Place Specific NoERC dialog is to selectively place a Specific No ERC directive on a point in the circuit that is already showing a violation, highlighted by a wavy colored line.
To place a specific No ERC marker targeted to that violation, right-click on the violating object (not the wavy colored line) and select the Place NoERC to Suppress command. The No ERC directive will appear on the cursor, pre-configured to suppress this violation. Press Tab to edit the look of the directive before placement.
The No ERC marker cannot be modified graphically other than changing its location. To move a No ERC marker, click and hold while dragging it to a new location. While dragging, the No ERC marker can be rotated (Spacebar/Shift+Spacebar).
The following sections describe the non-graphical editing options.
Dialog page: No ERC
This method of editing uses the No ERC dialog to modify the properties of a No ERC object.
The dialog can be accessed during placement by pressing the Tab key.
After placement, the dialog can be accessed in one of the following ways:
Dialog page: NoERC Manager
To review and edit all the No ERC directives used across the entire project, click Tools » NoERC Manager from the main menus to open the NoERC Manager dialog.
The NoERC Manager dialog allows you to move through the list of nets with directives applied and edit any number of No ERC directives. When editing is complete, click the Generate ECO button to apply all of the changes.
An Inspector panel enables the user to view and edit the properties of one or more design objects in the active document. Used in conjunction with the Find Similar Objects dialog, the panel can be used to make changes to multiple objects of the same kind, from one convenient location.
A List panel allows the user to display design objects from one or more documents in tabular format, enabling quick inspection and modification of object attributes. Used in conjunction with appropriate filtering - by using the applicable Filter panel or the Find Similar Objects dialog - it enables the display of just those objects falling under the scope of the active filter – allowing the designer to target and edit multiple design objects with greater accuracy and efficiency.
By default, No ERC markers are included during printing. To control this, by either disabling their inclusion entirely or excluding only specific symbols, use the Schematic Print Properties dialog, as shown below.
This dialog can be accessed by:
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