Metrohm 774 Oven Sample Processor - Manual (Page 104)

5 Detailed description
774 Oven Sample Processor, Instructions for use 98
The 14 output lines of the remote socket can be separately set (statically) in
manual operation as well as during method processing with the "Control"
command (CTL). A 14-place bit pattern must be defined for this. Every 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 the output line 1 to active (=set), that for example,
would cause a STOP command with a connected Titrino.
It is recommended to mask the output lines that are not relevant with a as-
terisk (∗) to prevent alterations to these line states.
The 8 input lines of the remote socket are queried during method process-
ing with the SCAN command (SCN). Method processing is interrupted
until the predefined bit pattern compares to the effective state of the input
lines (for example, the status of the ready line, for catching the end of a de-
termination with a Coulometer). An 8-place bit pattern must be set for this.
Every bit is assigned to an input line. If there is correspondence, method
processing will continue with the next command line. During manual opera-
tion the SCAN command serves as a status display 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"
expects an active input line 0 (1=set or active). This line is
set for example, by a Titrino after a titration has ended and it
is expecting a start signal again.
Input lines that are not being used or for which no defined state can be pre-
dicted, should also be masked here with an asterisk (∗).
To simplify the use of these remote control commands especially when
connecting several instruments with Metrohm cables, the following com-
mand parameters are available for the CTL and SCN commands. See next
page.
0 = inactive
1 = active
∗ = no change
0 = inactive (high)
1 = active (low)
∗ = arbitrary