HMIs (Human Machine Interfaces) often have a "backdoor" or a system menu accessible via a specific touch sequence during boot-up. Tools like allow users to pull the compiled file, though de-compiling it to find the password is a separate, difficult task. Where to Find Recovery Utilities
Instead of risking your infrastructure with untrusted software, consider these legitimate methods: PLC HMI Password Unlock - Facebook all plc amp hmi password unlock tool free
When using free password unlock tools, be aware of the following: HMIs (Human Machine Interfaces) often have a "backdoor"