Click the Ladder button 
on the toolbar.
Use the VisiLogic Ladder Editor to create the Ladder diagram that comprises your control application. Ladder diagrams are composed of contacts, coils, and function block elements arranged in nets.
In a Ladder diagram, the contacts represent input conditions. They lead power from the left Ladder rail to the right rail. This is why the first element in a net must always touch the left rail. Coils represent output instructions. In order for output coils to be activated, the logical state of the contacts must allow the power to flow through the net to the coil. This is why the elements in a net must be connected. Each net must contain only one rung.
Use the Ladder Editor to:
Place and connect Ladder Elements.
Apply Compare, Math, Logic, Clock, Store, and Vector functions.
Insert Function Blocks (FBs) into your program.
Build program Modules and Subroutines, and use internal Subroutine Jumps and Labels.
Place Comments on Ladder nets.
Ladder elements and functions may be dragged and dropped between nets. Hotkeys are also available for easy programming.
To start the Ladder Editor
Click the Ladder button on the toolbar.
