GE LPS-O Instruction Manual page 172

8.1 INTRODUCTION
played. In either case, as soon as any key on the keypad is pressed or remote communications resets the tar-
get, the LED indicating protective tripping by the relay will stop flashing and the Trip message will be removed
from display. The Trip information will be stored for later use.
When a system failure occurs, the Fail message is always shown on the bottom two lines of the display and
has the following format:
BBB FAIL–XXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXX
where BBB stands for the sub-system name issuing the message, and XXX...XXX is the text which describes
the critical self-test failure. The Fail message remains on the display until a key is pressed or until the relay
restarts successfully (with no self-test failures).
If a TRIP message is already on display when a failure occurs, the TRIP message is displayed on a single line
(top line) instead of on all the four lines. The fail message is still shown on the bottom two lines of the display,
as shown below:
Since a trip has occurred, the LCD background for all four lines will be flashing.
The Warn message is always shown on the bottom two lines of the display in the same format as the failure
message. The message remains on the display until a key is pressed or until the relay restarts successfully
(with no self-test warnings). If a TRIP message is already on display when a warning occurs, the display format
will be the same as the fail message. Since a trip has occurred the LCD background will be flashing.
The Initialization messages are displayed while the relay is initializing itself during a power up (and not during a
warm restart).
All other messages, which are the result of keypad operations, remain on the display until another key is
pressed or until no keys have been pressed for a period of 15 minutes. At the end of this time-out interval, the
display is blanked.
Though there are some exceptions (the display of present values and events), for any user initiated interaction,
the following applies:
• The top line of the display shows the current category. For example, if the user is editing a setting item, the
top line shows the name of the current category, the setting group number and the setting item number. If
the user is viewing the status of the Contact Converters, the top line shows CC STATUS.
• The fourth line usually displays the response to the actions initiated by the user. The response will be
8
either a success or error message.
When a session is ended by pressing the [END] [ENT] sequence of keys, the display is cleared after 10 sec-
onds. The KEYPAD/DISPLAY INTERFACE access privilege is then set to the View Level.
The [SET] command key allows the user to view or edit protection and general settings, change the active set-
tings group, and modify the date and time.
Pressing the [SET] key prompts the user for the Settings level password. If the password is not valid, the mes-
sage PASSWORD INVALID will be displayed on the bottom line of the display. The [CLR] key to deletes this
error message and prompts for the password again.
8-
4
TRIP AB Z1 50.5MI
BBB FAIL-XXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXX
LPS-O Line Protection System
8 LOCAL USER INTERFACE
8.1.5 SETTINGS
GE Power Management