GE Power Management
469 Motor Management Relay
5-27
5 ACTUAL VALUES
5.8 DIAGNOSTICS
5
5.8 DIAGNOSTICS
5.8.1 DIAGNOSTIC MESSAGES FOR OPERATORS
Some actual value messages are helpful in diagnosing the cause of Trips, Alarms, or Start Blocks. The 469
automatically defaults to the most important message. The hierarchy is Trip and PreTrip messages, Alarm, and
lastly, Start Block Lockout. To simplify things, the Message LED (indicator) will flash, prompting the operator to
press the
key. When
is pressed, the next relevant message is automatically displayed. The 469
cycles through the messages with each keypress. When all of these conditions have cleared, the 469 reverts
back to the normal default messages.
Any time the 469 is not displaying the default messages because other Actual Value or Setpoint messages are
being viewed and there are no trips, alarms, or blocks, the Message LED (indicator) will be on solid. From any
point in the message structure, pressing the
key will cause the 469 to revert back to the normal default
messages. When normal default messages are being displayed, pressing
displays the next default
message immediately.
a) EXAMPLE
When an overload trip occurs, an RTD alarm may also occur as a result of the overload and a lockout time
associated with the trip. The 469 automatically defaults to the
A1 ACTUAL VALUES \ LAST TRIP DATA \ CAUSE OF
LAST TRIP
actual value message and the Message LED flashes. Pressing the
key cycles through the
time and date stamp information as well as all of the pre-trip data. When the bottom of this queue is reached,
pressing
again normally returns to the top of the queue. However, because an alarm is active, the dis-
play skips to the alarm message at the top of the
A1 ACTUAL VALUES \ ALARM STATUS
queue. Similarly, pressing
again skips to the
A1 ACTUAL VALUES \ START BLOCK \ START BLOCK LOCKOUT
message. Pressing
once final time returns to the original
CAUSE OF LAST TRIP
message, and the cycle could be repeated.
When the
has been pressed, the hot RTD condition is no longer present, and the lockout time has
expired, the display will revert back to the normal Default Messages.
LAST TRIP DATA:
CAUSE OF LAST TRIP:
Overload
TIME OF LAST TRIP:
12:00:00.0
DATE OF LAST TRIP
Jan 01 1992
↓
↓
↓
ANALOG INPUT 4
PreTrip: 0 Units
ACTIVE ALARMS:
STATOR RTD #1
ALARM: 135°C
START BLOCK
LOCKOUTS:
OVERLOAD LOCKOUT
BLOCK: 25 min
NEXT
NEXT
NEXT
NEXT
NEXT
NEXT
NEXT
NEXT
RESET
Содержание MOTOR MANAGEMENT RELAY 469
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