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A change of group can be achieved either locally at the relay fascia or remotely via a communication
interface command.
4.6 Password Feature
The programmable password feature enables the user to enter a 4 character alpha code to secure access
to the relay settings. The relay is supplied with the password set to 'NOT ACTIVE', which means that the
password feature is disabled. The password must be entered twice as a security measure against accident
changes. Once a password has been entered then it will be required thereafter to change settings. It can,
however, be de-activated by using the password to gain access and by entering the password 'NONE'.
Again this must be entered twice to de-activate the security system.
As soon as the user attempts to change a setting the password is requested before any setting alterations
are allowed. Once the password has been validated, the user is 'logged on' and any further changes can
be made without re-entering the password. If no more changes are made within 1 hour then the user will
automatically be 'logged off', re-enabling the password feature.
Note that the password validation screen also displays a numerical code. If the password is lost or
forgotten, this code should be communicated to Siemens and the password can be retrieved.
If the code is 1966067850 then 4 spaces have been entered as the password. This is caused by ENTER
being pressed three times on the Change Password setting screen. De-activate password using 'NOT
ACTIVE' as described above if this was set un-intentionally.
5 User Interface
The user interface is designed to provide a user-friendly method of entering settings and retrieving data from the relay.
The relay fascia includes a 20 character by 2 line, backlit, liquid crystal display (LCD), 32 light emitting diodes (LED) and
5 push buttons.
5.1 Liquid Crystal Display
The liquid crystal display is used to present settings, instrumentation and fault data in a textual format on a
2 lines by 20-character interface.
5.2 Back light Control
To conserve power the display backlighting is turned off if no push buttons are pressed for 5 minutes.
After an hour the whole display is de-activated. A setting within the "SYSTEM CONFIG MENU" allows the
timeout to be adjusted from 1 to 60 minutes and "OFF", which means the backlight is always on.
5.3 LED Indications
The following indications are provided:
Protection Healthy – Green LED.
This LED is solidly illuminated to indicate that DC volts have been applied to the relay and that the relay is
operating correctly. If the internal relay watchdog detects a protection relay unhealthy condition then this
LED will continuously flash.
Programmable – Red LED.
An LED MENU is provided to map any output to any LED.
5.4 Keypad
Five pushbuttons are used to control the functions of the relay. They are labelled ,
CANCEL. Note that the
When the relay front cover is in place only the
access to all the menu displays.
5.5 Relay Identifier
The Relay Identifier setting in the SYSTEM CONFIG MENU may be used to place a circuit identifier of up
to 16 alphanumeric characters onto the relay fascia e.g. BOLDON SGT1. This information is also returned
as part of the System Information command from Reydisp Evolution Communications Support Software.
©2010 Siemens Protection Devices Limited
button is also labelled TEST/RESET.
and
MSCDN – MP2A Description of Operation
buttons are accessible. This allows only read
,
ENTER and
Chapter 1 Page 8 of 13
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