4.2 FACEPLATE INTERFACE
minimum value. While at the minimum value, pressing the VALUE
tinue downward from the maximum value.
HAS BEEN STORED
b) ENTERING ENUMERATION DATA
Enumeration settings have data values which are part of a set, whose members are explicitly defined by a name. A set is
comprised of two or more members.
Enumeration type values are changed using the
key displays the previous selection.
HAS BEEN STORED
c) ENTERING ALPHANUMERIC TEXT
Text settings have data values which are fixed in length, but user-defined in character. They may be comprised of upper
case letters, lower case letters, numerals, and a selection of special characters.
In order to allow the relay to be customized for specific applications, there are several places where text messages may be
programmed. One example is the MESSAGE SCRATCHPAD. To enter alphanumeric text messages, the following proce-
dure should be followed:
Example: to enter the text, "Breaker #1"
to enter text edit mode.
Press the VALUE
Repeat step 2 for the remaining characters: r,e,a,k,e,r, ,#,1.
to store the text.
If you have any problem, press the
appear for several seconds each. For the case of a text setting message, the
a new value.
As an example, set the flash message time setting to 2.5 seconds. Press the appropriate
numeric keys in the sequence "2 . 5". The display message will change as the digits are
key is pressed, editing changes are not registered by the relay. There-
fore, press the
momentarily appear as confirmation of the storing process. Numerical values which con-
tain decimal places will be rounded-off if more decimal place digits are entered than
specified by the step value.
For example, the selections available for
"Setting", and "Factory Service".
needs to be "Setting", press the
proper selection is displayed. Press the
Changes are not registered by the relay until the
stores the new value in memory. This flash message momentarily appears as confirma-
tion of the storing process.
key until the character 'B' appears; press
key to view the context sensitive help. Flash messages will sequentially
L90 Line Differential Relay
key again will allow the setting selection to con-
key to store the new value in memory. This flash message will
keys. The VALUE
key at any time for the context sensitive
4 HUMAN INTERFACES
are "Restricted", "Command",
key displays the next selection while
keys until the
key is pressed. Pressing
to advance the cursor to the next
key displays how to edit and store
GE Power Management