101
Supplemental RS-232
Information
Appendix E
The DB-9 RS-232 port on your instrument conforms to the DTE
EIA-232 standard and can reliably communicate over shielded
cable up to 10 meters in length, depending on the baud rate
you use. Almost every item of information displayed by your
instrument is also transmitted over the RS-232 port, including
test results, all error messages, and most display data from the
diagnostic menu.
Data is transmitted asynchronously as 1 start bit, 8 data bits
and 1 stop bit, with no parity. Each message transmitted
from the communication port is terminated by the sequence,
Carriage Return (0D Hex), Line Feed (0A Hex). Note that your
instrument is only capable of outputting information. At this
time, there is no protocol for talking to the instrument.
This product’s serial port output is based on ASCII code
protocols. No special codes are used to identify errors, test
results, or normal operational messages. Connection to any
data collection or LIMS system will require the user or a
third party to write custom interface software in order to
recognize and parse the text strings of interest. Advanced
Instruments does not maintain a central list of text strings
used in the various versions of software created, nor have we
adopted any standard protocol with respect to the format of
these messages. To determine the format and type(s) of text
strings contained in this instrument, users should follow the
instructions in this section and save the output for evaluation
by the interface programmer.
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