Stops unauthorized changes to the machine's operational screens.
The original programmer is no longer available, and the password wasn't recorded. Delta Hmi Password Unlock Software
Some tools work by monitoring the USB or RS-232 serial traffic between the PC and the HMI. When the software asks for a password, the "unlocker" intercepts the data packet where the HMI sends a "Password Correct/Incorrect" signal or, in older models, the actual password string. 2. Firmware Exploitation in older models