Allen-Bradley ClutchBrake PLC-5 Series - Assigning Passwords to Your Program and Data Files; Chapter Objectives; What Can Privilege Classes Protect

Chapter 5
Publication 65566.5.1 - October 1996
Assigning Passwords to Your
Program and Data Files
Program and data files of PLC-5/x6 processors can be protected from
unauthorized access by assigning privileges and a password to each
of four privilege classes. We have assigned these at the factory.
This chapter explains how:
• we assigned privileges to privilege classes
• we restricted access to certain program and data files
• you assign your own passwords to privilege classes 2-4
• you gain access to protected memory files
Privilege classes can control read/write access to:
• data files
• program files
• communication channels
They can also protect the control system from unauthorized changes
such as:
• modifying privileges
• uploading/downloading processor memory
• forcing bits on/off
• changing processor mode
Chapter Objectives
What Can Privilege
Classes Protect?