B.2
SEL-751A Relay
Instruction Manual
Date Code 20100129
Firmware Upgrade Instructions
Upgrade Instructions
Step 4. Start upgrading of firmware.
a. Issue the
L_D
command to the relay.
b. Type
Y <Enter>
at the following prompt:
Disable relay to receive firmware (Y/N)?
c. Type
Y <Enter>
at the following prompt:
Are you sure (Y,N)?
The relay will send the !> prompt.
NOTE:
If you have difficulty at
115200 bps, choose a slower data
transfer rate (e.g., 38400 bps or
57600 bps). Be sure to match the
relay and PC data rates.
Step 5. Change the baud rate, if desired.
a. Type
BAU 115200 <Enter>
.
This will change the baud rate of the communications
port to 115200.
b. Change the baud rate of the PC to 115200 to match the
relay.
Step 6. Begin the transfer of new firmware to the relay by issuing the
REC
command.
Step 7. Type
Y
to erase the existing firmware or press
<Enter>
to
abort.
Step 8. Press any key (e.g.,
<Enter>
) when the relay sends a prompt.
Step 9. Start the file transfer.
Select the send file option in your communications software,
e.g., use the Xmodem or 1k Xmodem protocol, and send the
file that contains the new firmware (e.g., r400751A.s19 or
r400751A.z19).
The file transfer takes approximately 10–15 minutes at 115200
baud and with 1k Xmodem transfer protocol. After the transfer
is complete, the relay will reboot and return to Access Level 0.
shows the entire process.
=>>
L_D <Enter>
Disable relay to receive firmware(Y/N) ?
Y <Enter>
Are you sure (Y,N) ?
Y <Enter>
Relay Disabled
!>
BAU 115200 <Enter>
!>
REC <Enter>
Caution! This command erases the firmware.
If you erase the firmware then new firmware
must be loaded before returning the IED to service.
Are you sure you want to erase the existing firmware(Y/N)?
Y <Enter>
Erasing firmware.
Erase successful.
Press any key to begin transfer and then start transfer at the terminal.
<Enter>
Upload completed successfully. Attempting a restart.
Figure B.1
Firmware File Transfer Process
Step 10. The relay illuminates the
ENABLED
front-panel LED if the relay
settings were retained through the download.
If the
ENABLED
LED is illuminated, proceed to
.
If the
ENABLED
LED is not illuminated or the front-panel
displays
STATUS FAIL
,
EEPROM FAILURE
,
or
Non_Vol
Failure
, use the following procedure to restore the factory
default settings:
a. Set the communications software settings to 9600 baud,
8 data bits, and 1 stop bit.
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