Setpoint Entry - GE Multilin 489 Instruction Manual

4.1.5

Setpoint Entry

4–6
Courtesy of NationalSwitchgear.com
The 489 does not have '+' or '–' keys. Negative numbers may be entered in one of two
manners.
• Immediately pressing one of the
scroll through its range including any negative numbers.
• After entering at least one digit of a numeric setpoint value, pressing the
keys changes the sign of the value where applicable.
VALUE
To store any setpoints, terminals C1 and C2 (access terminals) must be shorted (a
keyswitch may be used for security). There is also a setpoint passcode feature that restricts
access to setpoints. The passcode must be entered to allow the changing of setpoint
values. A passcode of "0" effectively turns off the passcode feature - in this case only the
access jumper is required for changing setpoints. If no key is pressed for 5 minutes, access
to setpoint values will be restricted until the passcode is entered again. To prevent setpoint
access before the 5 minutes expires, the unit may be turned off and back on, the access
jumper may be removed, or the
The passcode cannot be entered until terminals C1 and C2 (access terminals) are shorted.
When setpoint access is allowed, the Setpoint Access LED indicator on the front of the 489
will be lit.
Setpoint changes take effect immediately, even when generator is running. However,
changing setpoints while the generator is running is not recommended as any mistake
may cause a nuisance trip.
The following procedure may be used to access and alter setpoints. This specific example
refers to entering a valid passcode to allow access to setpoints if the passcode was "489".
Press the
displayed in the following sequence:
Press the
menu.
Press the
setpoints page.
The set point pages are numbered, have an 'S' prefix for easy
identification and have a name which gives a general idea of the
setpoints available in that page.
keys causes the setpoint to
VALUE
setpoint may be changed to "Restricted".
SETPOINT ACCESS
key to access the header of each menu, which will be
MENU
SETPOINTS
ACTUAL VALUES
TARGET MESSAGES
key until the display shows the header of the setpoints
MENU
or key to display the header for the first
MESSAGE ENTER
489 GENERATOR MANAGEMENT RELAY – INSTRUCTION MANUAL
CHAPTER 4: INTERFACES
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