Development of a relay ladder logic programming and simulation tool with graphical user interface


Two software packages have been developed in the Computer Integrated Manufacturing Laboratory of the University of Missouri-Rolla's Engineering Management Department. The first, LadderCAD, is a relay ladder logic programming environment. The second, SIM, is a simulation package. Using this software package, ladder logic programs may be tested, verified, and debugged off-line. Students receiving instruction in relay ladder logic programming may use LadderCAD's forward and backward interpretation to gain a more understanding of the process by which these programs are written and interpreted. LadderCAD and SIM may also be used in the instruction of digital data acquisition card programming.

Document Type

Conference Proceeding

Publication Date


Journal Title

ASEE Annual Conference Proceedings