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User Manual
GFK-1503F
7.7
Privilege Levels and Passwords
Passwords are an optional configurable feature of the VersaMax PLC. Passwords provide
different levels of access privilege to the PLC when the programmer is in Online or Monitor
mode. Passwords are not used if the programmer is in Offline mode. Passwords can restrict:
•
Changing I/O and PLC configuration data
•
Changing programs
•
Reading PLC data
•
Reading programs
There is one password for each privilege level in the PLC. Each password may be unique or
the same password can be used for more than one level. Passwords are one to seven ASCII
characters in length.
By default, there is no password protection. Passwords are set up, changed, or removed
using the programming software. After passwords have been set up, access to the PLC is
restricted unless the proper password is entered. Entering a correct password allows access
to the requested level and to all lower levels. For example, the password for level 3 allows
access to levels 0, 1, 2, and 3. If PLC communications are suspended, protection
automatically returns to the highest unprotected level. For example: If a password is set at
levels 2 & 3, but none at level 4, if the software disconnects and reconnects, the access level
is 4. Privilege level 1 is always available because no password can be set for this level.
Level
4
Least
Protected
3
CPU Operation
Access Description
•
Write to all configuration or logic. Configuration may only be written in Stop
mode; logic may be written in Stop or Run mode (if run-mode store is
supported).
•
Set or delete passwords for any level.
•
Plus all access from levels 3,2 and 1.
Note:
This is the default if no passwords are defined.
•
Write to all configuration and logic when the CPU is in Stop mode, including
word-for-word changes (when supported), the addition/deletion of program
logic, and the overriding of discrete I/O.
•
Read/Write/Verify user flash.
•
Store reference/override tables.
•
Change sweep mode.
•
Plus all access from levels 2 and 1.
Chapter 7
Jan 2020
78
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