With that info, I can give safer, more targeted guidance.

If you have tried every trick listed above and still cannot get in, you need a hardware forensic specialist.

For professionals working with or sourcing equipment from the Chinese market, it's helpful to be aware of regional variations in software and terminology.

To move away from insecure recovery methods and protect your facility from unauthorized access, implement a robust lifecycle strategy for industrial passwords. Action Item Legacy Infrastructure (Legacy PLCs/HMIs) Modern Infrastructure (Smart Factories/IIoT)

Restrict access so that operators cannot access PLC engineering software.