Sequoia LISST-200X User Manual

LISST-200X User’s Manual LISST-200X Operation Details Page 71
E. Instrument Communication
Overview
The cables Sequoia supplies with the LISST-200X send data through a
standard USB port. However, the LISST-200X itself communicates
through RS-232 serial protocol. The 5-pin male connector on the
LISST-200X carries the RS-232 signals (and power). The cables
incorporate adapters that convert between RS-232 and USB.
If you use a different cable that does not include the RS-232-to-USB
adapter, you can use an external adapter, or connect directly to an RS-
232 port if your computer has one (which is rare on any recent
computer). In Windows, both RS-232 and USB connections will appear
as COM ports. To establish communication with LISST-SOP or other
software, you must set the software to communication with the correct
COM port.
If interfacing to a data logger or controller system other than a Windows
computer, you will likely also use a direct RS-232 connection.
The RS232 link communicates at 9600 baud, 8 data bits, No parity, and
1 stop bit. For offloading data files, the LISST-SOP software uses
YMODEM protocol at 115K baud. The transfer rate can be changed in
the settings of the LISST-SOP software. A slower speed may be
required when downloading data over cables longer than a few meters.
Using the LISST-
SOP Terminal
Window
In the LISST-SOP software, you can open a terminal window to directly
view communications with the LISST-200X, and enter commands.
When the LISST-200X is connected and the terminal window is the
front window, the LISST-200X should respond to pressing the enter key
with the L200X:> prompt. If the instrument is in the deep sleep mode,
you can wake it by pressing the Stop button.
Pressing the Start button will begin the collection of data using the
current sampling program (see
Configuring Data Collection).
Direct
Commands
In most cases, LISST-SOP software will be used to configure and
operate the LISST-200X. However, some functions are available only
through direct commands in the terminal window. Also, in some
applications the LISST-200X may need to communicate to another
datalogger or custom program. For this purpose, a large set of
commands is available to operate the instrument. See the LISST-200X
Command Summary on page 75 for detailed descriptions of each
command.

Sequoia LISST-200X Specifications

General

Brand	Sequoia
Model	LISST-200X
Category	Measuring Instruments
Language	English