Losing or forgetting a Koyo PLC password can halt production and disrupt operations. Koyo PLCs, widely known through AutomationDirect under the DirectLOGIC, Click, and Do-more series, utilize password protection to safeguard intellectual property and prevent unauthorized logic changes.
Before attempting any intrusive extraction methods, explore official recovery channels. These methods prevent data corruption and preserve system integrity. 1. The DirectSOFT Software Reset
Connect your PC to the PLC using the appropriate programming cable. Open your programming software (DirectSOFT or CLICK). Clear All PLC Memory Initialize PLC
The reason these unlock methods exist is due to a severe, documented security vulnerability in the Koyo ECOM series. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) released an advisory (ICSA-12-102-02) acknowledging that the authentication mechanism in these PLCs is weak. Specifically, the hardware only allows for an 8-byte password with no complexity requirements. More critically, the system lacks a lockout feature or a timeout between failed attempts, making it trivially vulnerable to brute-force attacks. Because of this, the time and skill required to compromise a locked Koyo PLC are minimal compared to modern industrial controllers. koyo plc password unlock
I can provide the exact step-by-step instructions for your specific hardware. Share public link
Ensure you have the legal right to access the code. Passwords are often used to protect a manufacturer's Intellectual Property (IP).
, or the equipment's model/serial number if it fits the 8-character format. Recovery & Unlocking Methods Brute-Force Utilities : For DirectLogic PLCs, tools like the Koyo Login scanner Losing or forgetting a Koyo PLC password can
, 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)
Locate the .ckp (Click), .prj (DirectSOFT), or .dmd (Do-more) project files on your engineering laptops or company servers.
Open the project properties or security settings within the programming software while offline. These methods prevent data corruption and preserve system
Before attempting to unlock or crack a KOYO PLC password, you must verify your legal right to the intellectual property (IP).
: Misconfiguring the password permissions can inadvertently break system architecture. For instance, locking the CPU completely can block external communication profiles, causing downstream Human-Machine Interfaces (HMIs) or SCADA systems to drop connections entirely. Low-Risk Inspection and Legitimate Recovery Strategies
Q: Can I use a third-party tool to unlock my Koyo PLC? A: While third-party tools and services may claim to offer Koyo PLC password unlocking services, it is recommended to exercise caution and use official Koyo tools or contact Koyo support directly.
For specific older Koyo models that rely on RAM backed up by a lithium battery, removing the battery and disconnecting power for an extended period (usually 1 to 24 hours) will drain the volatile memory. This completely wipes the password and the program. 3. Advanced Recovery: EEPROM Reading and Decryption