Unlocking a Delta HMI password typically refers to one of three things: regaining access to the System Settings , opening a Protected Project File , or uploading a program from the HMI to a PC ( Upload Password 1. Default Factory Passwords

Password Reset Procedure:

Part 3: Official Methods to Unlock/Reset a Delta HMI Password

Delta does not provide a backdoor “master password” for security reasons. However, they offer several official recovery routes depending on the HMI model and firmware version.

  1. Open DOPSoft (Delta’s HMI programming software).
  2. Load your original .dvp (DOP-B) or .dop (DOP-100) project file.
  3. Go to Project → Settings → Protection.
  4. Remove or change the upload password.
  5. Compile and download to the HMI (via USB, Ethernet, or RS-232). This overwrites the old password.

How to Unlock a Delta HMI Password: Causes, Recovery, and Prevention

Delta Electronics is a global leader in industrial automation, and their Human-Machine Interface (HMI) panels—such as the DOP-B, DOP-100, and DOP-W series—are widely used in factories, process control, and machine building. These HMIs store critical operator screens, macros, recipes, and communication settings.