It was a typical Monday morning at the manufacturing plant, with the hum of machinery and the chatter of workers filling the air. But for John, a maintenance technician, the day had just taken an unexpected turn. He approached the Proface HMI (Human-Machine Interface) terminal, a touchscreen panel that controlled the production line, only to find that the screen was locked.
If you have a backup project file ( .prx ) but cannot open it in GP-Pro EX because it asks for a project password, the password hash is stored within the file binary.
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John hesitated, unsure of how to explain the situation. He had been the one responsible for setting up the HMI, and now he was paying the price for his forgetfulness.
Look for older versions of the .prx file that might predate the password implementation. It was a typical Monday morning at the
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Complete Guide to Pro-face HMI Password Unlock: Recovery and Troubleshooting If you have a backup project file (
The password should now be reset to default or cleared, allowing you to access system settings. Method 2: Resetting via Project Update
Follow these steps if you have the project file:
This is the most common roadblock. When a project is transferred to the physical HMI, the developer can check a box to restrict unauthorized uploads. If you attempt to pull the project from the HMI to a PC via Ethernet or USB, the software will demand this specific password. Official Methods to Reset or Bypass Passwords
Navigate to the top menu and select > System Settings > Security .