If you do not need the exact program currently running on the PLC (e.g., you have an official, up-to-date backup file on your engineering laptop), you do not need to crack the password. You can completely wipe the PLC memory and download your backup.
When downloading and using Omron Toolbus, users should be aware of the following security considerations:
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Connect your PC to the PLC using the or Sysmac Way protocol in CX-Programmer. Switch the PLC to PROGRAM mode .
Which you are currently running (CX-Programmer or Sysmac Studio) Whether you possess an offline backup file of the project If you do not need the exact program
This service is not available for “lost password” situations where the user cannot provide legitimate ownership documentation. As stated in Omron’s official FAQ: “为保证用户工程的安全性，请备份好原工程，我们无法提供解密服务” (To ensure the security of the user's project, please back up the original project; we cannot provide decryption services) .
After clearing, the password protection is entirely removed, and you can set a new password if desired. Switch the PLC to PROGRAM mode
The modern automation platform designed for the NJ/NX/NY series controllers, featuring advanced encryption and user access control. Legitimate Methods to Resolve Lost Passwords
Furthermore, the industry has moved away from "cracking" passwords and toward proper credential management. Standard operating procedures now dictate that passwords must be documented in secure vaults, ensuring that the knowledge is retained by the organization rather than being lost with the individual.
Use Sysmac Studio’s integrated security settings to assign unique usernames and passwords to individual engineers rather than using a single global password.