B.12
SEL-400 Series Relays Instruction Manual Date Code 20171006
Firmware Upgrade Instructions
Upgrade Procedure
NOTE: The relay displays one or
more “C” characters while waiting for
your PC terminal emulation program
to send the new firmware. If you do
not start the transfer quickly (within
about 18 seconds), the relay times out
and responds
Remote system is
not responding. If this happens,
begin again at
F Upload New Relay
Firmware on page B.11
.
Step 6. Begin the file transfer.
The typical transfer time at 115200 bps with 1K Xmodem is 10 to 20
minutes. The LCD screen shows
SELBOOT Ryyy LOADING CODE while
the relay loads the new firmware.
Step 7. Wait for firmware load completion.
If the relay responds with the message
Transfer failed — Model
mismatch
, please refer to Troubleshooting on page B.17.
When finished loading the new firmware, the relay responds,
Transfer completed successfully and displays the SELBOOT !>
prompt. The LCD screen displays
SELBOOT Ryyy SEL-4xx-Rnnn,
where yyy is the SEL
BOOT revision number, 4xx is the particular
model of the SEL-400 series relay being upgraded, and nnn is the
firmware revision number of the relay, e.g., R100 SEL-421-R105.
G Return Serial Data Speed to Nominal Operating Speed and Exit
SELBOOT
Step 1. Type <Enter> to confirm relay communication.
The terminal displays the SEL
BOOT !> prompt.
Step 2. Type BAU 9600 <Enter> to reduce the data speed to your nominal
serial communications speed (9600 bps in this example).
Step 3. Set your terminal emulation program to match the nominal data speed.
Step 4. Type <Enter> to confirm that you have reestablished communication
with the relay.
The relay responds with the SEL
BOOT !> prompt.
Step 5. Type EXI <Enter> to exit the SEL
BOOT program.
After a slight delay, the relay responds with the following message:
CAUTION: Initial relay restart. DO NOT cycle power during
this time. Please wait 3 minutes for restart completion.
H Verify Relay Self-Tests
Step 1. Press <Enter> and confirm that the Access Level 0 = prompt appears
on your terminal screen.
Step 2. Remove input power to the relay.
a. Allow at least 10 seconds during the removal of relay power to
ensure that the power supply has shut down.
b. Reapply input power to the relay.
c. Wait 10 minutes after startup of the relay to allow the relay to
detect any hardware changes made during the upgrade process.
Step 3. Enter Access Level 1 using the ACC command and Access Level 1
password.
Step 4. Enter Access Level 2 using the 2AC command and Access Level 2
password.
Step 5. Type STA <Enter> to check the relay status and accept new hard-
ware changes if needed.
Step 6. Verify that all relay self-test parameters are within tolerance. (The
relay compares the settings before and after the upgrade process and
displays an upgrade warning if settings are dissimilar. You can find
details in the upgrade report file.)
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