Metrohm 730 Sample Changer - Manuel (Page 124)

4.8 Remote Interface
730 Sample Changer, Detailed Description
121
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 predicted, should also be masked here with an asterisk (
∗ ).
With a suitable multi-cable (with special wiring) several instru-
ments can be controlled simultaneously via the remote lines. The
bit patterns for the CTL and SCN commands can be combined for
this, i.e. two Titrinos, for example, can be simultaneously started
(CTL Rm
∗∗∗∗∗∗∗ 1 ∗∗∗∗ 1) and the end of both determinations can
be queried (SCN Rm ∗∗ 1 ∗∗∗∗ 1). Be aware, however, that some
instruments (Titroprocessors, 691 pH Meters) only transmit short
impulses (typically 20 ms) at the end of a determination and
therefore a combined query of the end of determination with other
instruments is only possible under certain conditions (dependent
upon time).
To simplify the use of these remote control commands especially
when connecting several instruments with Metrohm cables, the
following command parameters are available for the CTL and SCN
commands. For standard conditions (1 to 2 Titrinos, possibly with
an auxiliary Dosimat, 1 Titroprocessor, 1 pH-meter or ion meter)
predefined bit patterns are supported. These parameters are:
0 = inactive (high)
1 = active (low)
∗ = arbitrary