Settings Groups; Password Feature - Siemens 7SR45 Argus User Manual

Self powered/dual powered non-directional overcurrent and earth fault relay
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OPERATION
Control
USB/Rear Ports set to REMOTE *
USB/Rear Ports set to LOCAL *
Binary Inputs
Binary Outputs
Reporting
Spontaneous
IEC
General Interrogation
IEC
MODBUS
Change of settings
USB/Rear Ports set to REMOTE *
USB/Rear Ports set to LOCAL *
USB/Rear Ports set to LOCAL or
REMOTE *
Fascia
Historical Information
Event Records
Fault Information
Setting Information
* Each Communication port has a setting to allow the user to determine which port is used for local operation and
which port is used for remote operation. If the port is set to Local or Remote, the port can be used for all
operations and has no priority.
The communication port modes can be selected at:
SETTINGS MODE>SYSTEM CONFIG>Communications

3.22 Settings Groups

The relay provides two groups of settings – Group number (Gn) 1 to 2. At any one time, only one group of settings
can be 'active' – SYSTEM CONFIG >Active Group setting.
By using the View/Edit Group settings, the user can edit one group when the relay operates as per the settings
from another "active" group.
Some settings are independent of the active group setting i.e. they apply to all settings groups. The group
dependent settings are indicated by Gn prefix.
A change of settings group can be achieved both locally at the relay fascia and remotely over the data
communications channel(s) or via a binary input. By default, setting group change by BI is level triggered.
NOTE:
When the setting group or any setting parameters is changed, the relay will restart to apply the new settings and
the protection is not active for a moment.
NOTE:
One setting group is available for the MLFB 7SR4501-xGA10-1AA0 variant.

3.23 Password Feature

The relay incorporates password protection for settings.
The programmable password feature enables the user to enter a 4 character alpha-numeric code to secure
access to the relay functions. The relay is supplied with the password set to NONE, i.e. the password feature is
disabled. The password must be entered twice as a security measure against the accidental changes. Once a
password has been entered then it will be required thereafter to change settings. Passwords can be de-activated
by using the password to gain access and by entering the password NONE. Again this must be entered twice to
deactivate the security system.
©2018 Siemens Protection Devices Limited
Table 3-18
Operating Mode
REMOTE MODE
LOCAL MODE
Enabled
Disabled
Setting Option
Setting Option
Enabled
Enabled
Enabled
Enabled
Enabled
Disabled
Enabled
Enabled
Enabled
Enabled
Enabled
Chapter 1 - 7SR45 Description of Operation
OUT OF SERVICE MODE
Disabled
Enabled
Enabled
Enabled
Enabled
Enabled
Disabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Chapter 1 Page 47 of 48
Disabled
Disabled
Enabled
Disabled
Disabled
Disabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled

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