To avoid the hassle of a locked-out Koyo PLC:
If your only goal is to reuse a locked CPU and you , a factory reset is an effective solution. For many Koyo and AutomationDirect PLCs (like the DL05, DL06, DL105, and DL205), the only password removal method offered by the manufacturer is to completely wipe the CPU, which erases the program. This is analogous to a factory reset and returns the PLC to a blank state, allowing you to download a new program.
AutomationDirect (the primary distributor for Koyo PLCs) offers a service to clear passwords for legitimate owners: : You must ship the CPU to their facility. koyo plc password unlock
To avoid future lockout emergencies, implement a structured industrial security policy.
Always keep an un-passworded, master archive version of the PLC program on a secure local server, applying the password only to the runtime version loaded onto the plant floor hardware. To avoid the hassle of a locked-out Koyo
The primary reasons for password protection in Koyo PLCs are:
: For legacy DirectLogic series (like DL05, DL06, or DL205), you can send the unit back to AutomationDirect Technical Support . They will clear the password and memory free of charge (plus shipping) and return it in a factory-default state. The primary reasons for password protection in Koyo
To avoid costly downtime caused by forgotten passwords, industrial facilities should implement strict security management workflows:
While they generally won't "crack" a password for you (for security reasons), they can guide you through the official recovery process if you can prove ownership of the hardware. Prevention Tips To avoid this headache in the future:
In industrial automation, Koyo PLCs (often marketed under the DirectLOGIC brand by AutomationDirect) are known for their reliability, cost-effectiveness, and robust performance. However, a common challenge technicians and engineers face is encountering a password-protected Koyo PLC. Whether it’s an inherited project, a forgotten password, or a need to troubleshoot an existing machine, being locked out can halt production.
Check if a default "Admin" account without a password allows access.