The ability to unlock an HMI without the original password highlights a critical paradox in OT security:

Are you trying to a program from the HMI to your computer, or just change settings on the device itself?

Unlocking a Pro-face HMI typically involves using default factory passwords or performing a memory initialization if the custom password is forgotten. Initializing the memory will erase all screen data and programs from the device. Default Passwords

If your Proface HMI has a communication interface (e.g., RS-232, USB, or Ethernet), you can use Proface's software tools to unlock the password. You'll need:

If you have the project file ( .prx ) but cannot open it in , you are essentially locked out of the logic and screens.

To prevent this issue from recurring, implement these simple steps:

: Facilitates access using factory defaults—such as the common admin username and Pw#12345 password—for initial setup or after a system-wide wipe.