Allen-Bradley ClutchBrake PLC-5 Series - Protected Memory in PLC 5;X6 Processors; Passwords and Levels of Memory Protection

1–6 Overview of the Clutch/Brake Control System
Publication 65566.5.1 - October 1996
Security
When programmed with either version of Rockwell programming
software, PLC-5/x6 processors provide enhanced security.
Designated program files, such as those storing factory-configured
clutch/brake control logic, are locked at the factory. You can read
them but you cannot:
• edit locked program files of a PLC-5/x6 processor
• restore PLC-5/x6 programs to other PLC-5 processors
Other program files in the PLC-5/x6 processors are available for your
application programming.
Programs written for PLC-5/x6 processors are transferrable between
PLC-5/x6 processors only with the Rockwell software used to write the
original program.
Passwords and Levels of Memory Protection
Either version of Rockwell software and PLC-5/x6 processors provide
four levels of memory protection. The password to the highest level
(including, access to program files PF2 and PF16) is kept confidential at
the factory. We pre-assigned access privileges to other levels. They
include a read-only privilege at the lowest level. You create your own
passwords for the three lower levels.
We show you how to assign privileges and passwords in chapter 5.
Protected Memory in
PLC5/x6 Processors