It is better to watch a book ten times than to move a hand. The key to learning plc is to start. If you have a PLC, you can perform experiments such as downloading, uploading, program running, monitoring, and troubleshooting. The best practice is to download the program you have written to the PLC and perform the simulation debugging. The so-called analog debugging refers to using a small switch or button to simulate the on-site digital input signal, and using the LED on the PLC to indicate the state of the output point of the switch to observe the result of the program operation.
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FX is more expensive, and cheaper PLCs (such as FX1S and FX-compatible domestic PLCs) support limited application instructions, and some domestic compatible machines do not even have interrupt functions. Even with a PLC, the number of I/O points and experiments that can be done is very limited.
Mitsubishi plc's simulation software GX Simulator provides a good way to solve this problem. The simulation software is used to simulate the operation of the PLC's operating system and user program. Like the hardware PLC, the user program and configuration information need to be downloaded to the simulation PLC, and the keyboard and mouse are used to provide input signals to the simulated PLC on the computer screen, and observe the state of the output signal after the simulation PLC executes the user program.
GX Simulator is a simulation software for the programming software GX Developer. It is powerful and easy to use. It supports most of the commands in the FX series, and its functions exceed many domestic hardware PLCs compatible with FX. You can use GX Simulator to do simulation experiments on the computer, simulate the operation of the hardware PLC, and execute the user program. In the entry stage, the reader can use the simulation software instead of the hardware PLC to simulate the debugging program. The simulation experiment and the hardware experiment are almost exactly the same.