Ge 489 User Manual download pdf (Page 35)

GE Multilin 489 Generator Management Relay 3-3

3 USER INTERFACES 3.1 FACEPLATE INTERFACE

2. Press the or key until "G" appears, then press the decimal key to advance the cursor.

3. Repeat Step 2 for the remaining characters: e, n, e, r, a, t, o, r, #, and 1.

4. Press to store the text message.

c) ENTERING +/– SIGNS

The 489 does not have a ‘+’ or ‘–’ key. Negative numbers may be entered in one of the following two ways:

• Press the or keys the scroll through the setpoint range, including any negative numbers.

• Once a numeric setpoint is entered (after pressing at least one numeric key), press the or key to

change the sign, if applicable.

d) SETPOINT ENTRY

To store setpoints with the keypad, Terminals C1 and C2 (access terminals) must be shorted (a key switch may be used for

security). There is also a setpoint passcode feature that can restrict setpoint access from the keypad and communication

ports. If activated, the passcode must be entered before changing the setpoint values. A passcode of "0" turns off the pass-

code feature and only the access jumper is required to change setpoints. If no setpoint changes are made for 30 minutes,

access to setpoint values will be restricted until the passcode is entered again. To prevent setpoint access before the 30

minutes expiry, the unit may be turned off and back on, the access jumper may be removed, or the

SETPOINT ACCESS set-

point may be changed to "Restricted". The passcode for the front panel keypad cannot be entered until terminals C1 and

C2 are shorted. The Setpoint Access LED Indicator will be on if setpoint access is enabled for the front panel keypad.

The following procedure may be used to access and alter any setpoint message. This specific example will refer to entering

a valid passcode in order to allow access to setpoints if the passcode was "489"

1. The 489 programming is broken down into pages by logical groups. Press to cycle through the setpoint pages

until the desired page appears on the screen. Press to enter a page.

2. Each page is broken further into su/jointfilesconvert/1241728/bgroups. Press the and keys to cycle through su/jointfilesconvert/1241728/bgroups until

the desired su/jointfilesconvert/1241728/bgroup appears on the screen. Press to enter a su/jointfilesconvert/1241728/bgroup.

3. Each sub-group has one or more associated setpoint messages. Press the and keys to cycle

through setpoint messages until the desired setpoint message appears on the screen.

4. The majority of setpoints may be may be altered by pressing the and keys until the desired value

appears then pressing . Numeric setpoints may also be entered directly through the keypad. If an entered set-

point value is out of range, the original setpoint value reappears. If an out-of-step setpoint is entered, an adjusted value

is stored (e.g. a value of 101 for a setpoint that steps 95, 100, 105 is stored as 100). If a mistake is made entering the

new value, pressing resets the setpoint to its original value. Text editing is described in detail in Section b):

Entering Alphanumeric Text on page 3–2. When a new setpoint is successfully stored, the

NEW SETPOINT HAS BEEN

STORED

message flashes on the display.

5. Press the 4, 8, and 9 keys, then press . The

NEW SETPOINT HAS BEEN STORED message is briefly displayed

and the display returns to:

6. Press to exit the su/jointfilesconvert/1241728/bgroup. Pressing numerous times always brings the cursor to the top of the page.

 SETPOINTS

 S1 489 SETUP

 PASSCODE

 [ENTER] for more

ENTER PASSCODE FOR

ACCESS:

SETPOINT ACCESS:

PERMITTED

VALUE

ENTER

VALUE

SETPOINT

MESSAGE

ENTER

MESSAGE

VALUE

ENTER

ESCAPE

ESCAPE ESCAPE

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Ge 489 User Manual Page 35

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