Rockwell Automation Logix5000 Controllers Security Programming Manual - Manual (Page 56)

Chapter 5 Securing a ControlLogix controller
If the project file already exists on your system, an error message appears
that indicates that the controller is secured and you cannot go online.
Removing security from a controller with the CPU Security Tool
To remove security from a controller, do the following.
1. Start the Logix CPU Security Tool. Click the Start button, then click All
Programs, then click Rockwell Software, and then click Logix CPU
Security Tool.
2. In the Logix CPU Security dialog box, click the RSWho button.
56 Rockwell Automation Publication 1756-PM016G-EN-P - October 2014