Koyo Plc Password Unlock -

Do not start randomly guessing passwords. You can escalate a soft lock to a hard lock.

Some models (like the DL205 series) have a "Clear Password" DIP switch position. Consult your manual. Flipping this switch before power-up wipes the password while retaining the program.

These have more modern security settings and use different software. Productivity Series:

Restricts both viewing the code and making changes.