Setpoint Entry; Procedure - GE 489 Instruction Manual

3 OPERATION

3.2 SETPOINT ENTRY

To store setpoints from the front panel 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 com-
munication ports. If activated, the passcode must be entered before changing the setpoint values. A passcode of 0 turns off
the passcode 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 may be changed to Restricted. The passcode for the front panel keypad cannot be entered until terminals
ACCESS
C1 and C2 are shorted. The SETPOINT ACCESS indicator will be on if setpoint access is enabled for the front panel key-
pad.
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
until the desired page appears on the screen. Press
SS SETPOINTS
SS S1 489 SETUP
2. Each page is broken further into subgroups. Press the
the desired subgroup appears on the screen. Press
S PASSCODE
S [ENTER] for more
3. Each sub-group has one or more associated setpoint messages. Press the
through setpoint messages until the desired setpoint message appears on the screen.
ENTER PASSCODE FOR
ACCESS:
4. The majority of setpoints may be may be altered by pressing the
appears then pressing
ENTER
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
ESCAPE
ENTERING ALPHANUMERIC TEXT on page 3–4. When a new setpoint is successfully stored, the
message flashes on the display.
BEEN STORED
5. Press the 4, 8, and 9 keys, then press
NEW SETPOINT HAS
BEEN STORED
and the display returns to:
SETPOINT ACCESS:
PERMITTED
6. Press to exit the subgroup. Pressing
ESCAPE
GE Power Management
MESSAGE
MESSAGE
ENTER
. Numeric setpoints may also be entered directly through the keypad. If an entered set-
resets the setpoint to its original value. Text editing is described in detail in Section 3.1.6:
. The following flash message is briefly displayed:
ESCAPE
numerous times always brings the cursor to the top of the page.
ESCAPE
489 Generator Management Relay
to cycle through the setpoint pages
SETPOINT
to enter a page.
and keys to cycle through subgroups until
MESSAGE
to enter a subgroup.
MESSAGE
and
VALUE VALUE
3.2 SETPOINT ENTRY

3.2.1 PROCEDURE

SETPOINT
and keys to cycle
MESSAGE
keys until the desired value
NEW SETPOINT HAS
3-5
3