4.29
Date Code 20171006
Instruction Manual
SEL-400 Series Relays
Front-Panel Operations
Front-Panel Menus and Screens
shows the relay date/time screen when a high-accuracy source is in
use. Possible time sources,
qqqqq
, are listed in
. If you
use a high-accuracy time source, edits are disabled, the
DATE/TIME
display does
not show the highlight, and the screen does not show the help message on the bot-
tom line.
When no external time source is connected, you can use the front-panel
DATE
and
TIME
entry screens to set the date and time.
shows an example of these edit screens. Use the
Left Arrow
and
Right
Arrow
navigation pushbuttons to move the underscore cursor; use the
Up Arrow
and
Down Arrow
navigation pushbuttons to increment or decrement each date and time
digit as appropriate to set the date and time. For a description of the
LAST UPDATE
SOURCE
field, see
Configuring Timekeeping on page 3.75
.
To enable a high-accuracy external time source, connect an IRIG-B or PTP clock
to the relay. For a discussion of the timing modes in the relay see
Relay Status
The relay performs continuous hardware and software self-checking. If any vital
system in the relay approaches a failure condition, the relay issues a status warn-
ing. If the relay detects a failure, the relay displays the status failure
RELAY STA-
TUS
screen immediately on the LCD.
For both warning and failure conditions, the relay shows the error message for
the system or function that caused the warning or failure condition. You can
access the
RELAY STATUS
screen via the
MAIN MENU
. The
RELAY STATUS
screen
shows the firmware identification number (FID), serial number, whether the relay
is enabled, and any status warnings.
shows examples of a normal
RELAY STATUS
screen, a status warning
RELAY STATUS
screen, and a status failure
RELAY STATUS
screen. For more infor-
mation on status warning and status failure messages, see
.
Figure 4.32
DATE/TIME Screen
Figure 4.33
Edit DATE and Edit TIME Screens
DATE/TIME
DATE 03/15/2001
PRESS TO EDIT DATE
(MM/DD/YYYY)
TIME 00:00:00
LAST UPDATE
SOURCE: qqqqq
CANNOT EDIT DATE OR
TIME DUE TO A HIGH
PRIORITY TIME SOURCE
DATE (MM/DD/YYYY)
03/15/2001
TIME
00:00:00
Summary of Contents for SEL-421-4
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