If you can upload the compiled .obj file but cannot open it due to a password prompt: Open the file using a hex editor.
Understanding what needs "unlocking" is the first step, as Pro-face HMIs utilize three distinct, independent password types: System Password (Offline Mode):
Go to and send the updated project to the HMI via USB or Ethernet. Select Overwrite when prompted.
Use the "Information Label" feature in GP-Pro EX to leave contact info for the original programmer. Conclusion
If you need specific help recovering access, let me know the you are using (e.g., GP-4501TW) and the software version (e.g., GP-Pro EX v4.09). I can give you the exact menu navigation path for that hardware. Share public link proface hmi password unlock
Being locked out of a Proface HMI is a stressful but solvable problem. Your approach will depend on the type of password in place and your level of access. Always begin with the simplest solutions: try default passwords and attempt to read the project file via GP-Pro EX. If those fail, a full initialization of the HMI from Offline Mode is often the most straightforward solution, though it requires a project backup. For the most secure blockages, professional decryption services are the final, surefire solution.
If successful, you will gain access to the system's maintenance menu. From here, you can often reset the connection key or back up data.
Follow these steps if you have the project file:
Keep a secure, encrypted log of HMI passwords. If you can upload the compiled
Before attempting a full reset, try the manufacturer's default factory passwords.
Pro-face HMI security operates on several levels. Knowing which one is locked determines how to unlock it.
Contact the original System Integrator (SI) or OEM who built the machine. 2. Pro-face Support and Password Escrow
ProFace (a brand of Pro-face America, now part of Schneider Electric) HMIs are widely deployed in manufacturing, energy, and infrastructure automation to control Programmable Logic Controllers (PLCs). Password protection is critical for preventing unauthorized changes to operational parameters. However, lost credentials pose a significant operational risk, leading to production downtime. This paper examines the official and semi-official methodologies for regaining access to ProFace units (GP, SP, and LT series) when legitimate credentials are unavailable. It focuses on backdoor procedures, project file manipulation, and hardware-level resets while strictly adhering to proof-of-ownership requirements. Use the "Information Label" feature in GP-Pro EX
Modern Pro-face HMIs may use a "Connection Key." If lost, this can also be reset via the same memory initialization procedure in Offline Mode. Pro-face by Schneider Electric For official technical support, you can visit the Pro-face Service & Support page Do you have the original project backup , or are you trying to retrieve a program from an existing HMI unit
The password should now be reset to default or cleared, allowing you to access system settings. Method 2: Resetting via Project Update
Important cautions
If the project is intellectual property owned by your company, but the original developer is gone, contact Schneider Electric / Pro-face technical support. If you can prove ownership of the machinery, they may offer recovery options or assist in deciphering project files through authorized factory services.