LI-COR LI7200RS, Инструкция по эксплуатации

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D-1 LI-7200RS Enclosed CO₂/H₂O Analyzer
Appendix D.
Configuration Grammar
Note: This grammar supports the core features of the instrument, but some func-
tions are not fully described. Contact us if you have questions.
This section describes the protocol used by the instrument to communicate via RS-
232 and Ethernet, for both configuration and data output purposes. Commands
sent to the instrument have a certain structure that must be followed, and data sent
by the instrument comes packaged in a particular way. For example, to set the Band-
width to 10Hz, the following string
(Outputs(BW 10))
should be sent followed by a line feed character (decimal 10). Each command
begins with a left parenthesis ‘
(
‘, and ends with a right parenthesis ‘
)
’. Some com-
mands, such as
(BW...)
contain a single value, while other commands, such as
(Outputs...)
, can contain one or more commands. The parentheses mark the
start and stop of the command, and extra characters before or after are ignored, as
well as white space (spaces and tabs) before or after the parentheses. This string
would work equally as well, for example:
This is ignored ( Outputs (BW 10 )) and so is this
The instrument does not try parsing a command string until a line feed is received.
Since "extra" characters are ignored, commands can be terminated with carriage
return and line feeds equally as well.
Another example of a command string is
(Outputs(RS232(Freq 10)(Pres TRUE))(BW 5))