LD Rungs

Rungs are graphic components of Ladder Diagram (LD) programs and represent a group of circuit elements leading to the activation of a coil. Rungs have labels for identification within a diagram. Labels along with jumps enable controlling the execution of a diagram. The label and jump must have the same name. When the connection on the left of the jump element has the TRUE Boolean state, the diagram execution proceeds at the label element. Comments are in rich text and inserted above the rung , for documentation purposes only. To the left of a rung, a handle indicates the position within a diagram and enables repositioning by dragging and dropping.

While dragging rungs from either the toolbox or within a diagram, the language editor displays the possible drop points. Drop points are displayed as plus signs in a black circle. For rungs, the possible drop points are displayed between the rung handles on the left.

Drop points between rung handles while dragging a rung in a diagram

Task	Procedure
Insert a rung	From the Toolbox , drag the rung element into the language container where a drop point appears.
Drag a rung	When dragging rungs, the possible drop points are displayed between the handles on the left. To reposition a rung within a diagram, select the rung handle while holding down the left mouse button. The rung handle indicates the rung position on the left. Drag the rung to the required position in the diagram where a drop point is displayed.
Define the label for a rung	Right-click a rung, then click Add Label . In the upper left-hand corner, click in the text area beside the grey square and type the required label text.
Define the comment for a rung	Place comments in the space above the rung. After entering text, click elsewhere in the workspace to 'validate' the comment. In the language container, click the rectangular space above the rung, then type the required text.

LD Elements

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