Metrohm 789 Robotic Sample Processor XL - Manual (Page 88)

3.4 Commands
80 Metrohm Sample Processor, Operation
3.4.4 Communication commands
The coordination of external instruments or the explicit triggering of
functions is possible via both the Remote interface and the serial RS232
interface. The interfaces can be scanned for particular signal patterns or
incoming data strings. In return, individual signal lines can be set or any
character strings (as control commands) can be transmitted to con-
nected instruments.
SCAN
1
SCAN >sample sequence
7 SCN:Rm : Ready1
Rm,RS Ready1
Ready2
Ready∗
Cond ok
End1
End2
EndMeter
Continue
8 Bit (1,0 or ∗)
Scans the Remote
interface
= Device 1 ready
= Device 2 ready
= Devices 1+2 ready
= Conditioning finished
= EOD impulse device 1
= EOD impulse device 2
= End impulse 692 Ion Meter/713 pH Meter
= Continue impulse from instrument
any 8-bit binary pattern
In a sequence the SCN:Rm command will halt the run sequence until
the predefined signal pattern has been received.
Predefined binary patterns are available; these can be selected via
simple names (e.g. Ready1 or End2 ).
Ready describes a statically set Ready line (Output 0) of a connected
Metrohm instrument. End stands for a pulsed signal, e.g. EOD (=End of
Determination, Output line 3). When pulsed signals are being scanned
it is not possible to scan several lines in parallel.
Setting special binary patterns allows the flexible monitoring of con-
nected instruments. The following applies:
0
= line inactive
1 = line active
* = any line condition
Example: 00000001 = input line 0 is active = Device 1: Ready1
With the LEARN function the binary patterns (=line conditions) can be
adopted interactively (see p. 113).
Details about the Remote interface can be found in the Technical Ref-
erence.