CHAPTER 4: INTERFACES FRONT PANEL INTERFACE
L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-53
4
Figure 4-55: Main menu on graphical front panel
4.2.7 Change settings
4.2.7.1 Enhanced and standard front panels
Numerical data
Each numerical setting has its own minimum, maximum, and increment value associated with it. These parameters define
what values are acceptable for a setting.
Two methods of editing and storing a numerical setting value are available.
• 0 to 9 and decimal point — The relay numeric keypad works the same as a calculator. A number is entered one digit at
a time. The leftmost digit is entered first and the rightmost digit is entered last. Pressing the
MESSAGE left arrow or
pressing the ESCAPE key, returns the original value to the display.
• VALUE keys — The
VALUE up arrow increments the displayed value by the step value, up to the maximum value
allowed. While at the maximum value, pressing the
VALUE up arrow again allows the setting selection to continue
upward from the minimum value. The
VALUE down arrow decrements the displayed value by the step value, down to
the minimum value. While at the minimum value, pressing the
VALUE down arrow again allows the setting selection to
continue downward from the maximum value.
FLASH MESSAGE
TIME: 10.0 s
For example, select the SETTINGS  PRODUCT SETUP  DISPLAY PROPERTIES  FLASH
MESSAGE TIME setting.

MINIMUM: 0.5
MAXIMUM: 10.0
Press the HELP key to view the minimum and maximum values. Press the key again to view the
next context sensitive help message.
FLASH MESSAGE
TIME: 2.5 s
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 changes as the digits are being entered.

NEW SETTING
HAS BEEN STORED
Until ENTER is pressed, editing changes are not registered by the relay. Press ENTER to store the
new value in memory. This flash message momentarily appears as confirmation of the storing
process. Numerical values that contain decimal places are rounded-off if more decimal place digits
are entered than specified by the step value.
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