If you have physical access and the project is not "Upload Protected," you can use DOPSoft to upload the program to a PC. If a password is required and unknown, you cannot access the logic without it.
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However, it is a scalpel, not a hammer. It requires technical understanding of serial communications, bootloaders, and the specific HMI model. For the unprepared user, it poses a risk of permanent damage. If you have physical access and the project