SIPROTEC
®
4 Devices
4-337SA522 Manual
C53000-G1176-C119-2
4.15 Passwords
Passwords are assigned to a SIPROTEC
®
4 device to protect against unintended
changes to the device or unauthorized operations from the device, such as switching.
The following access levels are defined:
q
Switching/tagging/manual overwrite,
q
Non-interlocked switching,
q
Test and diagnostics,
q
Hardware test menus,
q
Individual settings,
q
Setting Groups.
ka458.gif
Figure 4-30 DIGSI
®
4, window indicating the active passwords — example
When using DIGSI
®
4 or the operator control panel on the SIPROTEC
®
4 device, a
password is requested for the specific functions.
Note:
Password protection against unauthorized access is only in place during on-line op-
eration. The passwords for setting changes are first activated when the settings are
loaded into the device. The passwords are irrelevant in the DIGSI
®
4 off-line mode.
To deactivate a password, you must know the password.
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