The basic idea of program simulation debugging is to simulate the actual state of the scene in a convenient form to create the necessary environmental conditions for the operation of the program. According to different ways of generating field signals, there are two forms of simulation debugging: hardware simulation method and software simulation method.
1) The hardware simulation method is to use some hardware devices (such as another PLC or some input devices, etc.) to simulate on-site signals and connect these signals to the input terminals of the PLC system in a hard-wired manner, which is more time-sensitive Strong.
2) The software simulation method is to write a set of simulation programs in the Mitsubishi PLC controller to simulate and provide on-site signals. It is simple and easy to implement, but the timeliness is not easy to guarantee. During the simulation debugging process, the method of segmented debugging can be adopted, and the monitoring function of the programmer can be used.