Unlocking a Koyo (Automation Direct) PLC typically requires the original password because the hardware does not support a field-serviceable bypass or reset that preserves the stored program. If you have lost the password, your options generally fall into two categories: factory resetting (erasing the program) or attempting advanced recovery methods. 1. Official Password Removal (Data Loss)
The Process (Using DirectSOFT 2.x or an older K-Software): koyo plc password unlock
If you don't need the program currently stored on the PLC and just want to reuse the hardware, a factory reset is the easiest path. Warning: This will wipe the entire memory. Unlocking a Koyo (Automation Direct) PLC typically requires
To avoid this situation in the future, consider these best practices: Document Everything: Keep a secure, encrypted file with all PLC passwords. Comment Your Code: Official Password Removal (Data Loss) The Process (Using