Metrohm 774 Oven Sample Processor - Manual (Page 38)

3 Introduction
774 Oven Sample Processor, Instructions for use 32
The first parameter of the DOS command represents the number of the
dosing instrument (1–12), the second parameter the function or volume to
be dosed.
Example:
DOS: 2 <ENTER> 4.51 ml <ENTER>
DOS: 2 <ENTER> <SELECT> ... fill <ENTER>
Interface monitoring
1
SCAN The SCAN function is used for monitoring the serial RS232 and the remote
interfaces. In this way it is possible to check the communication of the 774
Oven Sample Processor with other instruments. The interface can be se-
lected with the <SELECT> key and must then be confirmed with <EN-
TER>.
If the Remote interface is selected then the logical condition of input lines
0…8 is displayed as a bit pattern (1=active, 0=inactive). If the RS232
interface is selected then the received character strings are shown.
Example:
SCN:Rm :00000001 (= e.g. Coulometer is 'ready')
SCN:RS $d (= status query of Coulometer)
Operate interfaces
2
CTRL The CTRL function is used to operate the serial RS232 and remote inter-
faces. In this way it is possible to check the communication of the 774
Oven Sample Processor with other instruments. It is therefore possible to
transmit a remote command as a character string to a connected instru-
ment via the RS232 interface or to individually activate or deactivate re-
mote lines Output 0…13.
The interface can be selected with the <SELECT> key and must then be
confirmed with <ENTER>.
If the RS232 interface is selected then any character string can be entered;
this will be transmitted after confirmation with the <ENTER> key.
If the remote interface is selected then a 14-place bit pattern can be de-
fined which then defines the required logical conditions of remote lines
0…14. (1=active, 0=inactive, * =do not alter current condition). The
<SELECT> key can be used to select predefined bit patterns to cover the
most frequently required tasks (see also page 98ff). Setting the lines (static
signals) is carried out after pressing the <ENTER> key.
Example:
SCN:RS $d (=status query of Coulometer)
CTL:Rm :************01 (=start Coulometer or Titrino)
CTL:Rm : START device1 (=start Coulometer or Titrino)