Protocol (Rs-232), Diagnostic Port - Agilent Technologies VS Series Operation Manual

4.2 Protocol (RS-232), Diagnostic Port

RS-232 ports operate at 9600 baud, 8 bits, no parity, and one stop bit.
All characters transmitted to the leak detector are echoed by the leak detector. Commands,
inquiries, and strings of both commands and inquiries must be terminated by a carriage
return <CR>; the carriage return is echoed as a space character.
The maximum length of the input is 80 characters, if no carriage return has been received
before the 80th character the execution of the command string begins anyway.
Words that begin with:
? are inquiries for the controlling device to determine the current state or value of a
leak detector parameter.
PUT - are commands for the controlling device to set the current state or value of a
volatile leak detector parameter.
INIT - are commands for the controlling device to set non-volatile leak detector
parameters.
Other commands do not require a parameter and do not begin with any special characters.
Successful inquiries respond with data, followed by a space, then: ok<CR><LF>, as
specified in the tables of this appendix. Unsuccessful inquiries respond with the offending
inquiry followed by a space, then: #?<CR><LF> (line feed, <LF>).
Inquiries, parameters, and commands can be concatenated. Each word or numeric
parameter is followed by one or more spaces. The string is terminated by a <CR>, which
causes execution to begin.
Successful strings respond with the specified data for the input inquiries in the order the
inquiries were issued, followed by: ok<CR><LF>. Unsuccessful strings respond with the first
offending command followed by a space, then: #?<CR><LF>. All commands and inquiries
following the failed word are ignored; all parameters are discarded.
Table 4-2 on page 4-5, Table 4-3 on page 4-9, Table 4-4 on page 4-12, and Table 4-5 on
page 4-12 outline the available control and query commands.
4-2
VS Series Component Leak Detector