Sequoia LISST-100X, User Manual

Page: 87 / 144

LISST-100X User’s Guide 75
Instrument Communication
Serial Port
Settings
Communication with the LISST-100X is via an RS-232C link.
A cable that connects the instrument to a PC has been
provided. This cable connects the 5-pin underwater
connector on the instrument to a DB-9 serial port connector.
If required, DB-9 to DB-25 pin adapters are available.
The RS232 link communicates at 9600 baud, 8 data bits, No
parity, and 1 stop bit. Data file transfer is done using a
YMODEM transfer at 115K baud. The transfer rate can be
changed as described in the Step by Step Procedure:
Offloading Data Files on page 37.
Using the
Terminal
Window
Opening the Terminal Window, or alternate terminal
software such as MotoCross (installs in the LISST100 folder
during installation of the SOP), with the proper COM port
and communications settings will allow the user to
communicate with the instrument. The LISST-100X should
respond by either displaying text from a running program or
echoing an L100X:> prompt. If the instrument is in the Deep
Sleep Mode it will only wake up every 30 seconds, Print ZZZ
to the screen and then return to sleep.
The instrument firmware is retained in on-board flash
memory and will start executing when power is applied. After
a power up, pressing the ENTER key will cause an echo of
the L100X:> prompt. The Stop button will also send the
commands to turn off the main power to the laser and
electronics. Pressing the Stop button when the instrument is
not running will not hurt the instrument. It is recommended
to press the Stop button multiple times after stopping a
running program to make sure that the main power is
properly shut off. Pressing the Start button will begin the
collection of data using the current configuration.
Two Letter
commands Under most situations the LISST-SOP will be used to
configure and operate the LISST-100X. However, there are
times when the LISST-100X must interface to another
datalogger or custom program. For this purpose a set of two
letter commands is available to operate the instrument. See
the LISST-100X Command Summary on page 79 for
detailed descriptions of each command.
Start Condition
The LISST-SOP software or two letter commands can
configure the LISST-100X with one of five Start conditions:
Depth, Time, External Mechanical Switch, External Digital
Input, and Time Delay. The details of each condition are
described below.