Rockwell Automation Logix5000 Controllers Security Programming Manual - Manual (Page 51)

Securing a ControlLogix controller Chapter 5
The Logix CPU Security Tool displays the current status of the controller.
Notice that the controller in the following image is currently unsecured and
there is no password set in the controller.
4. Click Change Password.
5. In the Change Password dialog box, in the New Password box type a
password, and then in the Confirm New Password box, retype the
password. Click OK.
Rockwell Automation Publication 1756-PM016G-EN-P - October 2014 51