Date Code 20020129
SEL-300 Series Relays Firmware Upgrade Instructions
B-13
SEL-387E Instruction Manual
6WHS
As you did earlier in
Match Computer Communications Speed to the Relay
on
page B-8, change the computer communications speed to match.
6WHS
Use the
ACC
and
2AC
commands to enter Access Level 2 and proceed to
Verify
Calibration, Status, Breaker Wear, and Metering
EN LED Not Illuminated
If the EN LED does not illuminate, the relay can display various self-test fail status messages.
Press
{STATUS}
on the relay front panel and use the up and down pushbuttons to scroll through
the various status messages.
If the relay displays only an IO_BRD fail status message, the relay data transmission rate has
reverted to the value you recorded in
Prepare the Relay
6WHS
As you did in
Match Computer Communications Speed to the Relay
change the computer communications speed to match.
6WHS
Use the
ACC
and
2AC
commands to enter Access Level 2 and proceed to
IO_BRD
Fail Status Message
, Step 1.
If fail status messages display for any combination of CR_RAM, EEPROM, and IO_BRD, the
relay baud rate has reverted to the factory default of 2400 baud. Go to
CR_RAM, EEPROM,
and IO_BRD Fail Status Messages
, Step 1.
IO_BRD Fail Status Message
6WHS
Use the
INITIALIZE
(
INI
) command to reinitialize the I/O board(s). If this
command is not available, go to
CR_RAM, EEPROM, and IO_BRD Fail Status
Messages
, Step 1.
6WHS
Answer
Y <Enter>
to the question: “Are the new I/O board(s) correct (Y/N)?”
After a brief interval (as long as a minute), the EN LED will illuminate. Verify that
the relay retained the original settings.
6WHS
Enter Access Level 2 by issuing the
ACC
and
2AC
commands.
6WHS
Go to
Verify Calibration, Status, Breaker Wear, and Metering
CR_RAM, EEPROM, and IO_BRD Fail Status Messages
6WHS
As you did earlier in
Match Computer Communications Speed to the Relay
on page
6WHS
Change communications software settings to 2400 baud, 8 data bits, 1 stop bit.
6WHS
Reestablish communication.
6WHS
Press
<Enter>
to have the Access Level 0 prompt “=” appear on your terminal screen.
