4.7
Date Code 20171006 Instruction Manual SEL-400 Series Relays
Front-Panel Operations
Front-Panel Layout
Autoscrolling Mode
Autoscrolling mode shows each screen for a user-configurable period of time.
Front Panel setting SCROLD defines the period of time for which each screen is
shown. When you first apply power to the relay, the LCD shows the autoscrolling
ROTATING DISPLAY. With SCROLD := OFF, the screen remains on the first screen
in the rotating display order; automatic rotation of additional screens is disabled.
The autoscrolling
ROTATING DISPLAY also appears after a front-panel inactivity
time-out (see Front-Panel Inactivity Time-Out on page 4.4). The relay retrieves
data prior to displaying each new screen. The relay does not update screen infor-
mation during the display interval. At any time during autoscrolling mode, press-
ing ENT takes you to the
MAIN MENU. Pressing any of the four navigation
pushbuttons switches the display to manual-scrolling mode.
Manual-Scrolling Mode
In manual-scrolling mode, you can use the directional navigation arrow pushbut-
tons to select the next or previous screen. Pressing the Down Arrow or Right Arrow
pushbuttons switches the display to the next screen; pressing the Up Arrow or Left
Arrow pushbuttons switches the display to the previous screen.
In manual-scrolling mode, the display shows arrows at the top and bottom of the
vertical scroll bar. The screen arrows indicate that you can navigate between the
different screens at will. The relay retrieves data prior to displaying each new
screen. Unlike the autoscrolling mode, the relay continues to update screen infor-
mation while you view it in the manual-scrolling mode. To return to autoscrolling
mode, press ESC or wait for a front-panel time-out.
Alarm Points
You can display messages on the front-panel LCD that indicate alarm conditions
in the power system. The relay uses alarm points to place these messages on the
LCD.
Figure 4.7 shows a sample alarm points screen. The relay is capable of displaying
as many as 66 alarm points. The relay automatically displays new alarm points
while in manual-scrolling mode and in autoscrolling mode. While you navigate
the HMI menu structure, the relay does not automatically display the alarm
points. Instead,
ALARM EVENT displays in the footer. When you escape the HMI
menu structure, the relay will display the alarm points screen.
Figure 4.7 Sample Alarm Points Screen
*Circuit BK1 SF6 Gas
ALARM POINTS
Press to acknldge
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