Metrohm 768 KF Oven - Manual (Page 18)

3.1 General rules
768 KF Oven
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3. Operation via RS232 interface
3.1 General rules
The 768 KF Oven has an extensive remote control facility that allows full control via the
RS232 interface, i.e. the instrument can receive data from an external controller or it can
send data to an external controller. CR and LF are used as terminators for the data transfer.
The 768 KF Oven sends 2xCR and LF as termination of a data block, to differentiate
between a data line which has CR and LF as terminator. The controller terminates its
commands with CR and LF. If the controller sends more than one command per line, the
character ';' is used as separator between the commands.
The commands are grouped logically and are simple to understand. Thus, e.g. for the
selection of the dialog language the command
&Config.Aux.Language ”english”
must be sent, but only the boldface characters need be inputted, thus
&C.A.L "english" .
The data groups of this order are:
Config
Entries for the configuration
Aux Auxiliaries, various subjects
Language Dialog language
The commands have a hierarchial structure (tree structure). The quantities that appear in
this tree are called objects in what follows. The dialog language is an object that is called up
with the command
&Config.Aux.Language ”english”
If one is at the desired location in the tree, the value of the appropriate object can be
queried:
&Config.Aux.Language ”english” $Q Q for Query
$Q triggers the output of the value from the 768 KF Oven. Entries that are introduced with
the character dollar ($) trigger something. They are thus called triggers in what follows.
Values of objects can not only be requested, however, they can also be modified. Values are
always entered in quotation marks (”), e.g.
&Config.Aux.Language ”english”