4.4
SEL-400 Series Relays Instruction Manual Date Code 20171006
Front-Panel Operations
Front-Panel Layout
Front-Panel LCD
The LCD is the prominent feature of the relay front panel. Figure 4.4 shows the
following areas contained in the LCD:
➤ Title area
➤ Main area
➤ Message area
➤ Scroll bars
The scroll bars are present only when a display has multiple screens.
Front-Panel Inactivity Time-Out
An LCD backlight illuminates the screen when you press any front-panel push-
button. This backlight extinguishes after a front-panel inactivity time-out period.
You can control the duration of the time-out with relay setting FP_TO, listed in
Table 4.1.
To set FP_TO, use the SET F (set front panel) settings from any communications
port or use the Front Panel branch of the QuickSet Settings tree view. The maxi-
mum backlight time is 60 minutes (FP_TO = 60). When the front panel times out,
the relay displays an automatic
ROTATING DISPLAY, described later in this section
under Screen Scrolling on page 4.5.
Navigating the Menus
The relay front panel presents a menu system for accessing metering, settings,
and control functions. Use the LCD and the six pushbuttons adjacent to the dis-
play (see Figure 4.4) to navigate these front-panel menus.
The navigation pushbutton names and functions are the following:
➤ ESC—Escape pushbutton
➤ ENT—Enter pushbutton
➤ Left Arrow, Right Arrow, Up Arrow, and Down Arrow—Navigation pushbuttons
Figure 4.4 LCD Display and Navigation Pushbuttons
Navigation
Pushbuttons
Title Area
Main Area
Scroll Bars
Message Area
Table 4.1 Front-Panel Inactivity Time-Out Setting
Name Description Range Default
FP_TO Front-panel display time-out OFF, 1–60 minutes 15 minutes
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