GE Multilin 565 Instruction Manual page 78

SETPOINTS MODE - ANALOG INPUT
Location Message Line
S 5.1
SETPOINTS
L
ANALOG INPUT
A
S 5.2
ANALOG INPUT:
L
DISABLED
A
Only message S 5.17 will appear if DISABLED is selected in message 5.2.
S 5.3
EDIT ANALOG
L
INPUT TITLE?
A
If YES is selected in message S 5.3, a brief description on how to store titles is displayed followed by message S 5.4.
S 5.4
L
__ USER TITLE
A
S 5.5
EDIT ANALOG
L
INPUT UNITS?
A
If YES is selected in message S 5.5 a brief description on how to store units is displayed followed by message S 5.6.
S 5.6
L
UNITS
A
S 5.7
MIN CURR SCALE
L
VALUE:
A
5-34
Description
The setpoints page 5 header. This page allows the setpoints related to the
analog input to be entered.
This message allows the user to enable or disable the analog input
function.
This setpoint allows the user to enter any name of up to 16 characters, for
the analog input. This name will then appear in the relevant displays. Use
NO
the NEXT CHOICE key to select YES and store this, if you intend to assign
a name to the analog input.
The display shows that the 565 Relay is ready to have the analog input
name assigned. Press the LINE UP or LINE DOWN key to display each
letter of the alphabet, one at a time. When the desired letter is displayed,
press the NEXT CHOICE key to move the cursor to the next position.
Repeat the same procedure for each additional letter of the title. Once the
complete title is displayed, press the STORE key to save it in the 565
memory. After the STORE key has been pressed, the screen will return to
message S 5.3.
This setpoint allows the user to enter any name of up to 8 characters, for
the analog input unit. This name will then appear in the relevant displays.
NO
Use the NEXT CHOICE key to select YES and store this, if you intend to
assign a name to the analog input units.
This display appears when the 565 Relay is ready to have the analog input
unit name assigned. Enter the required unit name, such as "DEG C" on the
left hand side of the display, as described in message S 5.4. When the last
character is displayed, press the STORE key to return to message S 5.5.
The 565 Relay has the ability to accept an analog input signal in the range
of 4-20 mA and this display asks for the scale factor which you intend to
4.00
use for the minimum analog input.
The quantity being monitored might be the temperature of a transformer
on the feeder. This input can be used to initiate alarms if it exceeds safe
levels. A scale factor can be chosen to change the displayed value from
milliamps to degrees centigrade. The use of the minimum scale factor is
shown by the following example. The 565 Relay logic is configured so that
the value which you will see displayed when the analog signal is 4 mA will
be the scale factor minimum value. Refer to the manufacturer's instruc-
tions for the monitor or device to determine the temperature (or other
quantity) corresponding to its 4 mA output.
If this value is 50 degrees centigrade, for example, then set the minimum
scale factor at 50. Now when a 4 mA input is presented to the 565 Relay it
will display 50 indicating a temperature, which is more useful than a
milliamp reading.
The range of possible values for the minimum scale factor is 0 to 1023 in