GE DGP Series Instruction Manual page 183

8 INTERFACE 8.3 KEYPAD
6. RELAY TEST
This category tests the relay functions of the DGP system. If the [ENT] key is pressed and the DGP is already
in Test Mode, the current Test Mode selection is displayed. When not in Test Mode, the first item, END TEST
MODE, is displayed. The user may then select or cancel a test by using the [↑] and [↓] keys followed by the
[ENT] key. The displayed test is selected for execution by pressing the [ENT] key. When the test is selected,
the word ON will be displayed and the pickup of the selected function will result in the output of the DOR12
contact. The trip of the selected function will result in the output of the DOR13 contact. The user will be able to
monitor only one function at a time. That is, if a user selects a function to monitor, any previously selected func-
tion will no longer be monitored. Each test function may be selected by scrolling through the menu or entering
the test number and pressing [ENT].
To remove the DGP from test mode, the user can either press the arrow keys until END TEST MODE is dis-
played, then press the [ENT] key, or press the [1/Y] key followed by the [ENT] key twice. In either case, the cur-
rently selected function will stop being monitored.
7. MMI TEST
This selection is used to test the display, keyboard, status LED, target LEDs, and printer. If the [ENT] key is
pressed, the entire left 8-character display is lit, enabling the user to verify that all the LED segments are work-
ing. The right 8-character display prompts with NEXT?. If the user presses [3/N] followed by [ENT], the next
test (testing the right 8-character display) is skipped. If the user presses [1/Y] followed by [ENT], the right 8-
character display is lit, enabling the user to verify that all the LED segments are working.
The left 8-character display then prompts with LED TST?. If the user presses [3/N] followed by [ENT], the LED
test is skipped. If the user presses [1/Y] followed by [ENT], the LEDs will be tested. If the green LED is on, it will
be extinguished and the red LED lit. If the red LED is lit, it will be extinguished and the green LED lit. The target
LEDs will flash on/off 4 times and then each will be lit individually. When the test is over, the Target LEDs will be
returned to their original state.
The display then prompts with KEYBRD TEST?. If the user presses [3/N] followed by [ENT], the keyboard test
is skipped. If the user presses [1/Y] followed by [ENT], the keyboard test is initiated. First the display is blanked
and the user is expected to press keys on the keyboard. The key mnemonics are echoed on the display, verify-
ing that each key is being sensed correctly. The [CLR] key terminates the keyboard test.
When the keyboard test is complete (or the user has skipped the keyboard test), the display prompts with
PRINTER TEST?. If the user presses [3/N] followed by [ENT], the printer test is skipped and the MMI test ter-
minated. If the user presses [1/Y] followed by [ENT], the printer is tested for the applicable DGP models. Pat-
terns containing all printable characters would are printed in all possible columns.
8. FIX UP SETTINGS CRC
This category recalculates the CRC (cyclic redundancy check) of the settings in non-volatile memory. This cat-
egory is used after the DGP has reported an EEPROM failure, indicating that the stored settings do not match
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their CRC code. When using this command, it is imperative that the user EXAMINE EVERY SETTING IN
THE DGP SYSTEM to assure that each setting is still correct, before performing the [END]/[ENT] key
sequence to resume Protection.
After the [ENT] key is pressed, the display prompts with the message RECALC CRC?. If the user presses the
[3/N] key, the message CANCELLED is displayed and no action is taken. If the user presses the [1/Y] key, two
checks are performed: 1) privilege level must be Setting or Control level, and 2) Communication must not be in
the process of changing settings. If the checks fail, an error message is displayed and the action is not per-
formed. If the checks pass, then the Setting's CRC code is recalculated, the message CHECK SETTINGS is
displayed, and the LOCAL – SETTINGS CHANGE DONE event is logged in the sequence of events.
Once the Setting's CRC code has been calculated and EVERY DGP SETTING HAS BEEN EXAMINED , the
[END] [ENT] key sequence is entered to resume Protection.
GE Power Management DGP Digital Generator Protection System 8-
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