Metrohm 789 Robotic Sample Processor XL - Manual (Page 117)

3.9 The Remote interface
Metrohm Sample Processor, Operation 109
3.9 The Remote interface
Connected peripheral devices such as Titrinos, Titrandos, pH meters,
etc. can be controlled via the Remote interface (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 from a Titrino at the end of a titration).
Metrohm instruments should only be connected with the Metrohm Re-
mote cables provided, see Section 2.3.1.
3.9.1 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.
3.9.2 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 end of a titration from a Titrino). This is done by setting an
8-place binary pattern, in which each bit is assigned to an input 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). For example,
this line is set by a Titrino after a titration has been completed
and the Titrino can again accept a start signal.