PACSystemsâ„¢ RX3i and RSTi-EP CPU Reference Manual Section 4
GFK-2222AK October 2019
CPU Operation 101
For example, users with a Level 4 Privilege Level will be able to access privileges at all
privilege levels.
Note: The RUN/STOP Switch on the CPU overrides password protection. Even though the
programmer may not be able to switch between RUN and STOP Mode, the switch on the
CPU can do so.
4.9.1.1 Privilege Levels
There are four different privilege levels with Level 1 providing the least access and Level 4
providing the most access. The current privilege level is identified by the padlock icon on
bottom row of PME screen. (for example, icon shows that the PLC is in privilege Level 2).
Please see Table 4-1 for a description of CPU Privilege Levels.
Table 4-1: CPU Privilege Levels
Please refer the table below for more information on the PLC operation restrictions in
each privilege level (Yes – Allowed; No – Restricted).
Write to configuration or logic. Configuration may only be written in STOP
Mode; logic may be written in STOP Mode or RUN Mode. Set or delete
passwords for any level.
Note: This is the default privilege for a connection to the CPU if no
passwords are defined.
Write to configuration or logic when the CPU is in STOP Mode, including
word-for-word changes, addition/deletion of program logic, and the
overriding of discrete I/O.
Write to any data memory. This does not include overriding discrete I/O by
applying a force. The CPU can be started or stopped. CPU and I/O Fault
Tables can be cleared.
Read any CPU data except for passwords. This includes reading fault tables,
performing datagrams, verifying logic/configuration, loading program
and configuration, etc. from the CPU. None of this data may be changed.
At this level, RUN/STOP Mode transitions from the programmer are not
allowed.
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