A LD diagram is a sequential list of rungs. Each rung represents left to right boolean power flow, that begins with a power rail, always drawn in the first column of the diagram, and finishes with a coil or a jump symbol.

Each Rung is identified by a default numbered identifier (Rnnn) displayed on the left of the power rail. The rung identifier can be used as a target for jump instructions. Alternatively you can enter a specific rung label by double-click in the rung head on the left margin.

The LD editor enables you to manipulate whole rungs by selecting only their head in the left margin. The following example shows a selected rung:

When a rung is selected, use the commands of the Edit menu to delete, copy or cut it.

Created with the Personal Edition of HelpNDoc: Easily create HTML Help documents