Date Code 20011009
SEL-701-1 Monitor
Maintenance & Troubleshooting
Firmware Upgrade Installation
9.9
Firmware Upgrade Installation
SEL occasionally offers firmware upgrades to improve the performance of the
monitor. Since the SEL-701-1 Monitor stores firmware in flash memory, changing
physical components is not necessary. Upgrade the monitor firmware by downloading
a file from a personal computer to the monitor via the front-panel serial port as outlined
in the following sections.
Required Equipment
Personal computer.
Terminal emulation software that supports XMODEM/CRC protocol
(e.g., ProComm
â
Plus, Relay Gold, Microsoft Windows
â
Terminal
™
, SmartCOM, and CROSSTALK
â
).
Serial communications cable (SEL-C234A or equivalent, or a null-
modem cable).
Disk containing firmware upgrade file.
Upgrade Instructions
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.), select transfer
protocol (XMODEM/CRC), and transfer files (e.g., send and receive binary files).
Step 1.
If the monitor is in service, open its motor control circuits.
Step 2.
Connect the personal computer to the front-panel serial port and enter
Access Level 2.
Step 3.
Issue the
L_D <ENTER>
command to the monitor (L underscore D
<ENTER>).
Step 4.
Type
Y <ENTER>
to the “Disable monitor to send or receive
firmware(Y/N)?” prompt and
Y <ENTER>
to the “Are you sure
(Y/N)?” prompt. The monitor will send the SEL
BOOT
prompt !>.
Step 5.
Type
BAU 38400 <ENTER>
. This will change the baud rate of the
communications port to 38400. Change the baud rate of your PC to
38400 to match the monitor.
Step 6.
Make a copy of the firmware currently in the monitor. This is
recommended in case the new firmware download is unsuccessful. To
make a backup of the firmware, you will need approximately 2.3 MB
of free disk space. The procedure takes less than 10 minutes at 38400
baud.
Issue the
SEN <ENTER>
command to initiate the firmware transfer.
Select the binary XMODEM transfer and filename in your
communications software. Give the file a unique name to clearly
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