Level Meaning Read Operation Write Operation
2
Read All
Write Some
All data and settings are readable.
Poll Measurements
All items writeable at level 1.
Setting Cells that change visibility (Visible/Invisible).
Setting Values (Primary/Secondary) selector
Commands:
Reset Indication
Reset Demand
Reset Statistics
Reset CB Data / counters
Level 2 Password setting
3
Read All
Write All
All data and settings are readable.
Poll Measurements
All items writeable at level 2.
Change all Setting cells
Operations:
Extract and download Setting file.
Extract and download PSL
Extract and download MCL61850 (IEC61850 CONFIG)
Auto-extraction of Disturbance Recorder
Courier/Modbus Accept Event (auto event extraction, e.g. via
A2R)
Commands:
Change Active Group setting
Close / Open CB
Change Comms device address.
Set Date & Time
Switch MCL banks / Switch Conf. Bank in UI (IEC61850
CONFIG)
Enable / Disable Device ports (in SECURITY CONFIG column)
Level 3 password setting
4.2.1 BLANK PASSWORDS
A blank password is effectively a zero-length password. Through the front panel it is entered by confirming
the password entry without actually entering any password characters. Through a communications port the
Courier and Modbus protocols each have a means of writing a blank password to the IED. A blank password
disables the need for a password at the level that this password is applied.
Blank passwords have a slightly different validation procedure. If a blank password is entered through the
front panel, the following text is displayed, after which the procedure is the same as already described:
BLANK PASSWORD
ENTERED CONFIRM
Blank passwords cannot be configured if the lower level password is not blank.
Blank passwords affect the fall back level after inactivity timeout or logout.
The ‘fallback level’ is the password level adopted by the IED after an inactivity timeout, or after the user logs
out. This will be either the level of the highest-level password that is blank, or level 0 if no passwords are
blank.
4.2.2 PASSWORD RULES
● Default passwords are blank for Level 1 and are
AAAA for Levels 2 and 3
● Passwords may be any length between 0 and 8 characters long
MiCOM P747 Chapter 9 - Cyber-Security
P747-TM-EN-1 283
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