Metrohm 838 Advanced Sample Processor Manual - Manual (Page 76)

3.2 The Remote interface
68 Metrohm 838 Advanced Sample Processor, Appendix
3.2 The Remote interface
Connected peripheral devices can be controlled via the Remote inter-
face (25-pin socket).
Fourteen lines are available for the output of signals (Output 0–13).
Eight lines (Input 0–7) are available for receiving signals (e.g. the
"Ready" signal of a Metrohm device).
Metrohm instruments should only be connected with the Metrohm Re-
mote cables provided.
3.2.1 Output lines
The 14 output lines of the Remote socket can be set as required in both
manual operation as well as in a run sequence with the Control com-
mand (CTL). This is done by setting a 14-place binary pattern in which
each bit is assigned to an output line.
Output 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Bit 13 12 11 10 9 8 7 6 5 4 3 2 1 0
(bits are always numbered from right to left)
Example: CTL Rm ************1*
sets output line 1 to active (= set), for example, with a con-
nected Titrino this would be a Stop command. 0 resets the
output line to inactive.
We recommend that non-relevant output lines are masked with an as-
terisk (∗) in order that the condition of these lines are not altered.
3.2.2 Input lines
The 8 input lines of the Remote socket can be scanned during a
method sequence with the SCAN command (SCN). The method se-
quence will be halted until the given binary pattern coincides with the ef-
fective condition of the input lines (e.g. the status of the 'Ready' line for
scanning the determination end of a Metrohm device). This is done by
setting an 8-place binary pattern, in which each bit is assigned to an in-
put line. When the patterns coincide the run sequence will continue with
the next command line. In manual operation the SCAN command is
used for displaying the status of all input lines.
Input
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: SCN Rm *******1
is waiting for an active input on line 0 (1=set).
Input lines that are not of interest or for which no defined condition can
be predicted should also be masked with an asterisk (∗).
If external START (see configuration 2.2.1) is switched on then Re-
mote lines Input 7 and Input 6 will be reserved for external START and
STOP.