PLC Simulation

The technology of Computer Simulation is already very mature, but the simulation for PLC is still on the way of groping. The development of PLC Simulation separates hardware designing and software programming, which delays the cycle of exploitation as well as increasing exploitation cost. At the same time, as a very important course in college, PLC is studied by student only through the way of theory and logic ratiocination, which means the result, is not efficiency. A software is needed to offer a virtual circumstance to debug PLC system, in order to cut the cycle of designing and debugging. Our software of computer simulation is developed for PLC control system using the technology of computer simulation, including the simulation of PLC, circuit and the controlled object. The software is designed by the language of C++ in Visual Studio 2005 platform. The users can design Ladder program by this software, and change the ladder program into instruction program to observe the result. And then user can use the chip elements in the library or use the chip designed by users to build the circuit outside PLC. At last, users can judge the results through the coils, or observing the result of some typical controller objects, which is shown by animation. The innovation of this System is that the system has realized the design,program,realization and debugging of PLC. This System not only has realized the simulation of PLC itself but also realized the circuit outside PLC and PLC controller objects. The analysis of the typical objects proved this software can develop PLC system efficiently and safely with low cost and high value.