U.4.47
Date Code 20020501
User’s Guide
SEL-421/SEL-421-1 Relay
Basic Relay Operations
Reading Oscillograms, Event Reports, and SER
SEL-421 Relay stores the latest 1000 entries to a nonvolatile record. Use the
relay communications ports or the
AC
SEL
ERATOR
software to view the SER
records. For more information on the SER, see
.
Setting the SER and Examining an SER Record:
AC
SEL
ERATOR
Software
The procedure in the following steps shows you how to use the
AC
SEL
ERATOR
software to program relay elements into the SER. Also, use
these procedures to review SER records with the
AC
SEL
ERATOR
software.
This example assumes that you have successfully established communication
with the relay; see
Making an EIA-232 Serial Port Connection on page 4.6
for
a step-by-step procedure. In addition, you must be familiar with relay access
levels and passwords. See
Changing the Default Passwords: Terminal on
to change the default access level passwords. You should also be
familiar with the
AC
SEL
ERATOR
software. See
Step 1. Configure the communications port. Start the
AC
SEL
ERATOR
software. On the top toolbar, open the Communication menu,
and then click Port Parameters. You will see the Port
Parameters dialog box similar to
Speed, Data Bits, Parity, and Stop Bits that match the relay
settings. Defaults are 9600, 8, N, 1, respectively. Click OK to
update the
AC
SEL
ERATOR
software communications
parameters. Confirm that the Communications Status bar at the
bottom of the
AC
SEL
ERATOR
window says “Connected.”
Step 2. Confirm the correct
AC
SEL
ERATOR
software passwords.
Reopen the Communication menu and click Port Parameters.
Enter your Access Level 1 password in the Level One
Password text box, and your Access Level 2 password in the
Level Two Password text box. Click the OK button to accept
changes and close the dialog box.
Step 3. Read the present configuration of the SEL-421 Relay.
Download the present configuration in the SEL-421 Relay by
opening the Settings menu, then click Read. The relay sends all
configuration and settings data to the
AC
SEL
ERATOR
software.
Step 4. View the SER settings entry screen. Click on the Report branch
of the
AC
SEL
ERATOR
Settings tree view structure (See
). You will see the SER Points and Aliases window
.
Figure 4.40
Selecting SER Points
and Aliases Settings:
AC
SEL
ERATOR
Software.
Summary of Contents for SEL-421
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