Metrohm 788 IC Filtration Sample Processor - Manual (Page 123)

5.2 RS232 interface
788 IC Filtration Sample Processor
115
5.2 RS232 interface
5.2.1 General rules for remote control
The 788 IC Filtration Sample Processor is equipped with the compre-
hensive Metrohm remote control language, which allows full control
over the instrument via an RS232 interface, i.e. the 788 IC Filtration
Sample Processor can receive data from an external device or send
data to an external device. The 788 IC Filtration Sample Processor
sends 2uC
R R R R
and L
F F F F
as the terminator of a requested data block. In con-
trast, C
R R R R
and L
F FF F
are used as the terminator of a data line. On receipt of
data from an external device, this must always close its commands with
C
R R R R
and L
F FF F
. If more than one command is sent on a line, ‘
;
’ must be
used as a delimiter between the individual commands.
The data are grouped logically and readily understandable. For exam-
ple, to select the dialog language the command
&Config.Aux.Language " english "
must be sent with entry of the boldface characters sufficing, in other
words
&C.A.L " english "
All quantities of the 788 IC Filtration Sample Processor are collected in
groups. The entries for the configuration, for example, are located in
the group
&Config
The ‘Config’ group contains sub-groups, e.g. for setting the RS232 in-
terface parameters
&Config.RSset
or for various settings
&Config.Aux
The data have a hierarchical structure (tree structure). The quantities
which appear in this tree are called objects in what follows. The dialog
language is that object which is called up with the command
&Config.Aux.Language
Once you are at the desired location in the tree, you can request the
value of the object:
&Config.Aux.Language $Q Q for query
The inquiry ‘ $Q ’ initiates the output of the value on the instrument, in
other words the value output is triggered. Entries which begin with the
character ‘ $ ’ always trigger something and are hence referred to as
triggers in what follows.
However, values of objects can not only be requested, they can also be
modified. Values are always inputted in inverted commas, e.g.
&Config.Aux.Language " english "