. There is no official way to recover a forgotten password while keeping the program intact. 1. Default Passwords to Try
Before performing a reset, try these common default or "guessable" passwords: (Default for CLICK Ethernet and CLICK PLUS CPUs). Company Name Project Number Machine Model Number (no password). 2. Resetting the CLICK Series
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. This will wipe the entire memory.
Sometimes, the password only prevents online edits . Try the "Upload" function. Many machine builders password the "Write" function but leave "Read" open for troubleshooting. If you can upload the logic, you can strip the password offline.
If you tell me the (e.g., DL05, DL205, CLICK) and whether you need to save the current program , I can provide more tailored instructions. Koyo Electronics / PLC Direct DirectLogic 205 Manual Part 2 koyo plc password unlock
, distributed primarily by AutomationDirect, are widely utilized across industrial automation for their cost-effectiveness and reliability. However, field technicians often run into significant hurdles when inherited machinery or legacy equipment comes password-protected.
In some cases, specific hardware or software exploits may allow access without a full factory reset.
CLICK PLUS units often ship with the default username admin and password click . DirectLOGIC Series (DL05, DL06, DL205): No Field Reset:
For engineers and technicians, few situations are as stressful as being locked out of a Koyo (DirectLogic) PLC due to a forgotten or unknown password. Whether you are inheriting an old machine with no documentation or an employee left without handing over the credentials, understanding how to unlock your Koyo PLC is a critical skill for maintaining uptime and avoiding costly downtime. Default Passwords to Try Before performing a reset,
A: This is a safety feature. If the CPU powers up and detects an internal error or that the password is invalid, the system may automatically zero out the password to prevent a hardware lock-up.
Connect your PC to the Koyo PLC using DirectSoft programming software.
: Most Koyo units (DL05, DL06, DL205) allow you to reset the PLC to factory default by clearing the user memory. This completely erases the program and the password. You lose the code, but you get the PLC back. (Method: Set the dip switch to "Program" or "Terminal," cycle power, and use DirectSOFT to "Write to PLC" a blank program).
When attempting to unlock a Koyo PLC, users may encounter various issues. Here are some common problems and troubleshooting tips: Resetting the CLICK Series If you don't need
Disclaimer: This information is for educational purposes and for use in legal maintenance of industrial equipment. Attempting to bypass password security on systems you do not own or have permission to access is illegal.
: They will clear the password and the program at no charge. Contact : Reach their technical support at 1-800-633-0405. ⚠️ Important Considerations
: Standard "unlocking" usually results in the total loss of the existing program to protect intellectual property.
Before hacking, try the obvious. A staggering number of Koyo PLCs are left with default or simple passwords.