Metrohm 751 GPD Titrino - Manual (Page 108)

3.1 General rules
751 GPD Titrino
105
3 Operation via RS232 Interface
3.1 General rules
The Titrino has an extensive remote control facility that allows full control of the
Titrino via the RS 232 interface, i.e. the Titrino can receive data from an external
controller or send data to an external controller. CR and LF are used as termi-
nators for the data transfer. The Titrino sends 2xCR and LF as termination of a
data block, to differentiate between a data line which has CR and LF as termi-
nators. 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 be-
tween the individual commands.
The data are grouped logically and easy to understand. Thus e.g., for the selec-
tion 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:
Config
configuration data
Aux auxiliaries, various data
Language 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 dialog 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 que-
ried.
&Config.Aux.Language $Q Q means 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 modified. Values
are always entered in quotes, for example:
&Config.Aux.Language "english"