GE Multilin 489 Instruction Manual page 64

4–2
Courtesy of NationalSwitchgear.com
489 Status LED Indicators
• 489 IN SERVICE: Indicates that control power is applied, all monitored input/output
and internal systems are OK, the 489 has been programmed, and is in protection
mode, not simulation mode. When in simulation or testing mode, the LED indicator will
flash.
• SETPOINT ACCESS: Indicates that the access jumper is installed and passcode
protection has been satisfied. Setpoints may be altered and stored.
• COMPUTER RS232: Flashes when there is any activity on the RS232 communications
port. Remains on continuously if incoming data is valid.
• COMPUTER RS485 / AUXILIARY RS485: Flashes when there is any activity on the
computer/auxiliary RS485 communications port. These LEDs remain on continuously
if incoming data is valid and intended for the slave address programmed in the relay.
• ALT. SETPOINTS: Flashes when the alternate setpoint group is being edited and the
primary setpoint group is active. Remains on continuously if the alternate setpoint
group is active. The alternate setpoint group feature is enabled as one of the
assignable digital inputs. The alternate setpoints group can be selected by setting the
S3 DIGITAL INPUTS DUAL SETPOINTS
"Group 2".
• RESET POSSIBLE: A trip or latched alarm may be reset. Pressing the
the trip/alarm.
• MESSAGE: Under normal conditions, the default messages selected during setpoint
programming are displayed. If any alarm or trip condition is generated, a diagnostic
message overrides the displayed message and this indicator flashes. If there is more
than one condition present,
Pressing any other key return to the normally displayed messages. While viewing
normally displayed messages, the Message LED continues to flash if any diagnostic
message is active.
To return to the diagnostic messages from the normally displayed
messages, press the
Now, press the
scroll through the messages.
Note that diagnostic messages for alarms disappear with the condition
while diagnostic messages for trips remain until cleared by a reset.
Generator Status LED Indicators
• BREAKER OPEN: Uses the breaker status input signal to indicate that the breaker is
open and the generator is offline.
• BREAKER CLOSED: Uses the breaker status input signal to indicate that the breaker is
closed and the generator is online.
ACTIVATE SETPOINT GROUP
can be used to scroll through the messages.
MESSAGE
key until the following message is displayed:
MENU
TARGET MESSAGES [ w ]
key followed by the
MESSAGE
489 GENERATOR MANAGEMENT RELAY – INSTRUCTION MANUAL
CHAPTER 4: INTERFACES
setpoint to
key clears
RESET
key to
message