These have more modern security settings and use different software. Productivity Series:
, and check all boxes (Program, V-Memory, Password). This will wipe the device and remove the lock. CLICK Series: The default password for CLICK PLCs is often . If this has been changed and lost, you must use the CLICK Programming Software to clear the project and password via the "PLC" menu. Automation Direct Option 2: Retaining the Program (Recovering Lost Passwords) koyo plc password unlock
If you do not need the original program and just want to reuse the PLC, you can perform a complete memory clear. DirectLogic Series (DL05, DL06, DL205, etc.): DirectSoft Programming Software . Connect to the PLC, navigate to the Clear PLC Memory These have more modern security settings and use
Koyo's PLC programming software, such as Koyo's DirectSOFT, may have a password recovery feature. To use this method: CLICK Series: The default password for CLICK PLCs is often
This is usually done via DIP switches or a memory capacitor on the CPU, following the specific model's hardware manual. Local Professional Services
: Koyo passwords often follow a specific pattern: a single capital letter followed by seven digits (e.g., A0000000 ).