Metrohm 711 Liquino - Manual (Page 91)

4. Detailed description
711 Liquino, Instructions for use 85
Auxiliary and communication commands
Time-oriented auxiliary commands and communication commands are
available.
• PAUSE — this command interrupts sequence processing for a de-
fined period.
•
TIMER — sequence processing is interrupted until a defined time
(date and time) has been reached.
• CONTROL — during the sequence processing it is possible to set a
particular signal pattern at a remote connection or to send a character
string via an RS232 connection to a connected instrument. The corre-
sponding instrument interface can be selected.
Remote connection:
Four of the eight output lines (Output4…7) of the remote socket
can be set. The lines Output0 to Output3 are reserved for func-
tions of the various instrument modes.
A bit pattern is selected which gives the conditions of the output
lines (e.g. the status of the 'External start' line which is used to
start a Metrohm instrument). Each bit corresponds to an output
line.
Output 7 6 5 4 3 2 1 0
Bit 7 6 5 4 3 2 1 0
(Bits are always numbered from right to left)
Example:
command: CONTROL
i nt er f ace: Remot e
pat t er n 0100- - - - (lines 0…3 are reserved)
This example sets output line 6 active (1=set). This line starts a Ti-
trino, provided that remote cable 6.2141.090 is used to make the
connection. Output line 6 of the Liquino is connected to input line
0 of the Titrino and starts a determination when it is activated.
Output lines which are of no interest should be masked with an
asterisk (*).
With a suitable multiple cable (with special wiring) it is possible to
control several instruments simultaneously via the remote leads.
The bit patterns for the CONTROL command can be combined,
i.e. 2 Titrinos can be started simultaneously and the end of both
determinations can be scanned with a SCAN command.
Details about the remote interface can be found under 'Remote
Control Reference'.
Line conditions:
0 = inactive (high)
1 = active (low)
* = as chosen