Rockwell Software:

microsoft certified partner

IEC 1131

   What Is IEC 1131?
   Ladder Diagram
   Sequential Function Chart
   Function Block Diagram
   Structured Text
   Instruction Lists

IEC 1131 Ladder Diagram
For people who understand relay controls, LD continues to be an advantage in terms of usability. Although it is possible to program all control logic in LD, supplementing LD with other languages allows users access to the language best suited for a particular control task. The standard's implementation of LD appears below.

ladder Diagram.gif