Metrohm 756 KF Coulometer - Manual (Page 61)

4.1 General rules
756/831 KF Coulometer, Instructions of Use 53
4 Operation via RS232 Interface
4.1 General rules
The KF Coulometer has an extensive remote control facility that allows full control of
the KF Coulometer via the RS 232 interface, i.e. the KF Coulometer can receive data
from an external controller or send data to an external controller. CR and LF are used
as terminators for the data transfer. The KF Coulometer sends 2xCR and LF as ter-
mination 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:
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 queried.
&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 al-
ways entered in quotes, for example:
&Config.Aux.Language "english"