Metrohm 730 Sample Changer - Manuel (Page 128)

4.9 Operation via RS232 Interface
730 Sample Changer, Detailed Description
125
4.9 Operation via RS232 Interface Operation via RS232 Interface
4.9.1 General Rules General Rules
The 730 Sample Changer has an extensive remote control facility
that allows full control of the Sample Changer via the RS232 in-
terface, i.e. the Sample Changer can receive data from an exter-
nal controller or send data to an external controller. CR and LF are
used as terminators for the data transfer. The Sample Changer
sends 2xCR and LF as termination of a data block, to differentiate
between a data line which has CR and LF as terminators. The
controller terminates its commands with CR and LF. If more than
one command per line is sent by the controller, ";" is used as a
separator between the individual commands.
The data are grouped logically and easy to understand. Thus e.g.,
for the selection of the dialog language, the following must be sent
&Config.Aux.Language "english"
whereby it is sufficient to only transmit the boldface characters,
thus:
&C.A.L "english"
The quantities of the commands above are:
C onfig configuration data
A ux auxiliaries, various data
L anguage setting the dialog language
The data are hierarchically structured (tree form). The quantities
that occur in this tree are called objects in the following. The dia-
log language is an object which can be called up with the
&Config.Aux.Language
command.
If one is in the desired location in the tree, the value of the object
can be queried.
&Config.Aux.Language $Q Q for Query
The query command $Q initiates the issuing of the value on the
instrument and the value emission is triggered. Entries which start
with $, trigger something. They are thus called triggers.
Values of objects can not only be queried, they can also be modi-
fied. Values are always entered in quotes, for example:
&Config.Aux.Language "english"