Teledyne 9110EH - Nitrogen Oxides Analyzer - Manual (Page 123)

Model 9110EH Instruction Manual Operating Instructions
instrument and the download of data in electronic format). You can effectively disable the
reporting feature by setting the interface to quiet mode (Section 6.9.6, Table 0-18).
Status reports include iDAS data (when reporting is enabled), warning messages, calibra-
tion and diagnostic status messages. Refer to Appendix A-3 for a list of the possible
messages, and this section for information on controlling the instrument through the
RS-232 interface.
General Message Format
All messages from the instrument (including those in response to a command line request)
are in the format:
X DDD:HH:MM [Id] MESSAGE
Where:
X is a command type designator, a single character indicating the
message type, as shown in the Table 0-21.
DDD:HH:MM is the time stamp, the date and time when the message was issued. It
consists of the Day-of-year (DDD) as a number from 1 to 366, the hour
of the day (HH) as a number from 00 to 23, and the minute (MM) as a
number from 00 to 59.
[ID] is the analyzer ID, a number with 1 to 4 digits.
MESSAGE is the message content that may contain warning messages, test
measurements, iDAS reports, variable values, etc.
is a carriage return / line feed pair, which terminates the message.
The uniform nature of the output messages makes it easy for a host computer to parse
them into an easy structure. Keep in mind that the front panel display does not give any
information on the time a message was issued, hence it is useful to log such messages for
trouble-shooting and reference purposes. Terminal emulation programs such as Hyper-
Terminal can capture these messages to text files for later review.
6.11.3. Remote Access by Modem
The M9110EH can be connected to a modem for remote access. This requires a cable between
the analyzer’s COM port and the modem, typically a DB-9F to DB-25M cable (available from
TAI
).
Once the cable has been connected, check to make sure the DTE-DCE is in the correct
position. Also make sure the M9110EH COM port is set for a baud rate that is compatible with
the modem, which needs to operate with an 8-bit word length with one stop bit.
The first step is to turn on the MODEM ENABLE communication mode (Mode 64,
Section 6.10.2.11). Once this is completed, the appropriate setup command line for your
modem can be entered into the analyzer. The default setting for this feature is
AT Y0 &D0 &H0 &I0 S0=2 &B0 &N6 &M0 E0 Q1 &W0
M9110EH Rev 0 109