If you do not need the existing program and simply want to reuse the hardware, you can perform a factory reset. WinProladder Utility: Use the "Clear PLC" function within the WinProladder software
, which claim to support various Fatek OS versions but carry the inherent risks of unverified software. Password Recovery | PLCtalk - Interactive Q & A Fatek Plc Password Crack
Searching for a "deep paper" on Fatek PLC password cracking reveals a critical divide between theoretical security research and a dangerous "black market" of illegitimate tools. There is no official academic or industry white paper that provides a legitimate "how-to" for cracking these passwords, as doing so is primarily a cybersecurity threat If you do not need the existing program