B.10
SEL-400 Series Relays Instruction Manual Date Code 20171006
Firmware Upgrade Instructions
Upgrade Procedure
Step 2. Prepare to control the relay at Access Level 2. If the relay is not
already at Access Level 2, use the procedure in Enter Access Level 2
on page B.9.
Step 3. Start the relay SEL
BOOT program.
a. Type L_D <Enter>.
The relay responds with the following message:
Disable relay to send or receive firmware (Y/N)?
b. Type Y <Enter>.
The relay responds with the following message:
Are you sure (Y/N)?
c. Type Y <Enter>.
The relay responds with the following message:
Relay Disabled
Step 4. Wait for the SELBOOT program to load.
The front-panel LCD screen displays the SEL
BOOT Ryyy firmware
number (e.g.,
SELBOOT R100). Ryyy is the SELBOOT revision number
and is a different revision number from the relay firmware revision
number. The LCD also displays the present relay firmware (e.g.,
SEL-451-R102), and INITIALIZING.
When finished loading the SEL
BOOT program, the relay responds to
the terminal with the SEL
BOOT !> prompt; the LCD shows the
SEL
BOOT and relay firmware revision numbers.
Step 5. Press <Enter> to confirm that the relay is in SEL
BOOT; you will see
another SEL
BOOT !> prompt.
Establish a High-Speed Serial Connection
Step 1. At the SELBOOT prompt, type BAU 115200 <Enter> (see
Figure B.5).
Step 2. Set your terminal program for a data speed of 115200 bps.
Step 3. Press <Enter> to check for the SEL
BOOT !> prompt indicating that
serial communication at 115200 bps is successful.
E Upload New SELBOOT Firmware to the Relay
NOTE: Loading the incorrect
SEL
BOOT firmware to the relay may
cause the relay to malfunction,
requiring factory repair.
Upgrading SELBOOT firmware in SEL-400 series relays is typically not required
as part of a normal relay firmware upgrade process. However, core functions of
the relay are occasionally enhanced, and the SEL
BOOT firmware must be
upgraded to enable the enhanced functions. If a SEL
BOOT upgrade for the relay is
not indicated in your upgrade kit, skip this step and continue on to G Upload New
Relay Firmware on page B.6. See Table B.1 for file names.
NOTE: Do not cycle power to the
relay during the SEL
BOOT firmware
upgrade process. Doing so may cause
the relay to malfunction, requiring
factory repair.
To begin the relay SELBOOT upgrade, start at the SELBOOT !> prompt.
Step 1. Type REC BOOT command at the SEL
BOOT prompt, and answer Y
when prompted to erase the existing SEL
BOOT firmware.
Step 2. The relay will prompt you to begin the file transfer. Press any key to
begin the file transfer to the relay.
!>REC BOOT <Enter>
Caution! - This command erases the SELboot firmware.
Are you sure you want to erase the existing firmware? (Y/N)
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