Date Code 20011205
Firmware Upgrade Instructions
B-1
SEL-311A Instruction Manual
APPENDIX B: FIRMWARE UPGRADE INSTRUCTIONS
F
IRMWARE
(F
LASH
) U
PGRADE
I
NSTRUCTIONS
SEL may occasionally offer firmware upgrades to improve the performance of your relay. The
SEL-311A Relay stores firmware in Flash memory; therefore, changing physical components is
not necessary. A firmware loader program called SEL
BOOT
resides in the SEL-311A Relay.
These instructions give a step-by-step procedure to upgrade the relay firmware by downloading a
file from a personal computer to the relay via a serial port.
I
MPORTANT
N
OTE
R
EGARDING
S
ETTINGS
The firmware upgrade procedure may result in lost relay settings due to the addition of new
features and changes in the way memory is used. It is imperative to have a copy of the original
relay settings available in case they need to be re-entered. Carefully following these upgrade
instructions will minimize the chance of inadvertently losing relay settings.
R
EQUIRED
E
QUIPMENT
·
Personal computer.
·
Terminal emulation software that supports XMODEM/CRC protocol (e.g., CROSSTALK
®
,
Microsoft
®
Windows
®
Terminal and HyperTerminal, Procomm
®
Plus, Relay/Gold, or
SmartCOM).
·
Serial communications cable (SEL-234A or equivalent).
·
Disk containing firmware upgrade file.
U
PGRADE
P
ROCEDURE
The instructions below assume you have a working knowledge of your personal computer
terminal emulation software. In particular, you must be able to modify your serial
communications parameters (baud rate, data bits, parity, etc.), disable any hardware or software
flow control in your computer terminal emulation software, select transfer protocol (i.e.,
XMODEM/CRC), and transfer files (e.g., send and receive binary files).
1. If the relay is in service, disable its control functions.
Note:
If the SEL-311A Relay contains History (HIS) data, Event (EVE) data, Metering
(MET) data, or Sequential Events Recorder (SER) data that you want to retain,
you must retrieve this data prior to performing the firmware upgrade, because all
of these data sets may be erased in the upgrade procedure.
2. Connect the personal computer to the relay serial port 2, 3, or F, and enter Access
Level 2 by issuing the
ACC
and
2AC
commands. (Disconnect any other serial port
connections.)
Содержание SEL-311A
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