Filter
Top Products
Remote Operation Teledyne API T801 NDIR CO2 Analyzer Operation Manual
154
Text strings: Used to represent data that cannot be easily represented by other
data types, such as data channel names, which may contain letters and numbers.
They consist of a quotation mark, followed by one or more printable
characters, including spaces, letters, numbers, and symbols, and a final
quotation mark.
For example, “a”, “1”, “123abc”, and “()[]<>” are all valid text strings.
It is not possible to include a quotation mark character within a text string.
Some commands allow you to access variables, messages, and other items. When
using these commands, you must type the entire name of the item; you cannot
abbreviate any names.
8.2.1.4. STATUS REPORTING
Reporting of status messages as an audit trail is one of the three principal uses for
the RS-232 interface (the other two being the command line interface for
controlling the instrument and the download of data in electronic format). You
can effectively disable the reporting feature by setting the interface to quiet mode
(Section 6.2.1, Table 6-1).
Status reports include warning me
ssages, calibration and diagnostic status
messages. Refer to Appendix A-3 for a list of the possible messages.
8.2.1.5. 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<CRLF>
Where:
X is a command type designator, a single character indicating the
message type, as shown in the Table 8-2.
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, variable values, etc.
<CRLF> 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 HyperTerminal can capture these messages to text
files for later review.
07274B DCN6418