GE 489 User Manual

3-4 489 Generator Management Relay
GE Power Management
3.1 OVERVIEW 3 OPERATION
3
3.1.5 KEYPAD
Figure 3–5: 489 KEYPAD
The 489 messages are organized into pages under the headings
SETPOINTS
and
ACTUAL VALUES
. The key navi-
gates through the programmable parameters (setpoints) page headers. The key navigates through the measured
parameters (actual values) page headers.
Each page is divided into logical subgroups of messages. The and keys are used to navigate through
these subgroups.
The key is dual purpose. It is used to enter the subgroups or store altered setpoint values.
The key is also dual purpose. It may be used to exit the subgroups or to return an altered setpoint to its original
value before it has been stored.
The and keys scroll through variables in setpoint programming mode and will increment/decrement
numerical setpoint values. These values may also be entered with the numeric keypad.
The key may be pressed at any time for context sensitive help messages.
3.1.6 ENTERING ALPHANUMERIC TEXT
To customize the 489 for specific applications, there are several places where custom text messages may be programmed.
One example is the
MESSAGE SCRATCHPAD
. The following example demonstrates how to enter alphanumeric text mes-
sages.
For example, to enter the text, "Generator#1"
1. Press the decimal key [.] to enter text edit mode.
2. Press the or key until "G" appears, then press the decimal key to advance the cursor to the next posi-
tion.
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.
3.1.7 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.
SETPOINT
ACTUAL
MESSAGE
MESSAGE
ENTER
ESCAPE
VALUE
VALUE
HELP
VALUE
VALUE
ENTER
VALUE
VALUE
VALUE
VALUE

GE 489 Specifications

General

Brand	GE
Model	489
Category	Relays
Language	English