Availability Schematic Document
(Menu) : Place » Bus
(Toolbar) : Wiring

Description This command is used to place bus objects onto the current document. A bus is a polyline object that represents a multi-wire connection.

Use After launching the command, the cursor will change to a crosshair and you will enter bus placement mode. Simply click or press ENTER to anchor the starting point for the bus, then position the mouse and click or press ENTER to anchor a series of vertex points that define the shape of the bus. When you have finished drawing the bus, right-click or press ESC to complete placement.

Continue placing further bus objects, or right-click or press ESC to exit bus placement mode.

Press the TAB key during placement to edit the object's properties.

Use the BACKSPACE or DELETE keys to remove the last bus segment placed. If you do remove segments in this way, you must click to place a final segment, otherwise right-clicking will place the bus as it was, with all deleted segments reinstated.

Notes When placing a bus, various placement modes are available: 90 Degree, 45 Degree, Any Angle and Auto Wire. The mode specifies how corners are created when placing buses and the angles at which buses can be placed. The 90 Degree and 45 Degree modes both have Start and End sub-modes.

The Auto Wire mode is a special mode that allows you to automatically connect between two points on the schematic. The Autowirer will automatically route the bus around obstacles. When in this mode, press the TAB key to set the Autowirer options in the subsequent Point to Point Router Options dialog.

When placing a bus, press SHIFT+SPACEBAR to cycle through the bus placement modes. Press SPACEBAR to toggle between the Start and End sub-modes (when in 90 Degree or 45 Degree modes), or between Any Angle and Auto Wire modes (when either of these modes is active).

The current placement mode is displayed in the status bar. You can change modes at any time during bus placement.

Assign a bus to multiple nets using a Net Label of the form D[0..7] or D[7..0] , indicating that the nets D0 to D7 are carried by the bus. Whichever form you use, the ordering must be consistent between connected bus objects.

Use a Bus Entry object to connect to, or branch from a bus.

Buses can be attached to ports or sheet symbols, for connection to other schematic sheets.

Any changes made to object properties during placement will cause the default properties for the object to be updated, unless the Permanent option in the Default Primitives tab of the Preferences dialog is enabled. When this option is enabled, changes made will affect only the object being placed and subsequent objects placed during the same placement session.

Process Sch:PlaceBus