GE DGP Series Instruction Manual page 175

8 INTERFACE
8 INTERFACE 8.1 DISPLAY
The display consists of 16 LED alphanumeric character positions arranged side-by-side horizontally. There are
also 19 Target LEDs and 1 Status LED.
All messages on the display are the result of some keypad action, with four exceptions:
• the Trip message when the DGP has caused a protective trip,
• the Fail message when the DGP has discovered a critical self-test failure,
• the Warning message when the DGP has discovered a non-critical self-test failure,
• the Initialization message when the DGP is initializing during a power up.
All messages other than the Trip message are displayed at the same intensity, about half of full-intensity. User
input for setting changes is echoed at a lower intensity to help distinguish the stored setting value from one that
has not yet been entered into the DGP system.
The Trip message is displayed at highest intensity and has the following format: TRIP xxx xxx . The word TRIP
blinks to indicate that the DGP system has caused a protective trip. The two fields of information following the
word TRIP are non-blinking and contain the following information: a three-character fault type (e.g. ABC) and a
three-character trip type (see Section 8.3.10: INFORMATION KEY [INF] on page 8–12 for a list of the trip
types). The message will remain on the display permanently until removed by a keyboard operation. If the DGP
restarts or is powered down and up, the trip indicator is remembered and redisplayed. As soon as any key is
pressed, the Trip message is removed and no longer remembered.
The Fail message has the format FAIL xxx . The field following the word FAIL is a numeric code that indicates
the nature of the critical self-test failure. The Fail message remains on the display until a key is pressed or until
the DGP system restarts successfully (with no self-test failures). A list of the failure numbers and their mean-
ings can be found in Section 6.4: ERROR CODES on page 6–7.
The Warning message has the format WARN xxx. The field following the word WARN is a numeric code that
indicates the nature of the non-critical self-test failure. The Warning message remains on the display until the a
key is pressed or until the DGP system restarts successfully (with no self-test failures). A list of the warning
numbers and their meanings can be found in Section 6.4: ERROR CODES on page 6–7.
The Initialization message has the format INITIALIZING and is displayed while the DGP system is initializing
itself during a power-up sequence. The display is blanked as soon as initialization is complete.
All other messages that 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. The time-out interval is set to 10 seconds when the [END] and [ENT] keys are pressed successively;
at the end of this time-out interval, the display is blanked. Time-out also causes the MMI access privilege to be
set at View Level.
GE Power Management DGP Digital Generator Protection System
8.1 DISPLAY
8.1.1 DESCRIPTION
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