Metrohm 709 IC Pump - Manual (Page 46)

5 Interfaces
709 IC Pump
38
The inquiry ‘ $Q ’ initiates the output of the value on the instrument, in
other words the value output is triggered. Entries which begin with the
character ‘ $ ’ always trigger something and are hence referred to as
triggers in what follows.
However, values of objects can not only be requested, they can also be
modified. Values are always inputted in inverted commas, e.g.
&Parameter.A.Flow " 1.5 "
5.1.2 Call-up of objects
A section from the object tree is shown below:
Flow NX
A
Parameter
&
Root
M
Pump
Node 3
Node 2
Node 1
Node 0
The following rules apply to the call-up of objects:
Rules Examples
The root of the tree is designated by ‘&’.
For the call-up of an object, the nodes (levels) of the tree are
marked by a point (.).
For the call-up of the objects, as many characters as
necessary to allow unambiguous allocation of the object
suffice. If the call-up is not unambiguous, the first object in
the series is identified. Call up of the minimum shutoff
pressure:
&Parameter.A.Pmin
or
&Pa.A.Pmi
Uppercase and lowercase letters can be used. &PA.A.PMI or &pa.a.pmi
A value can be assigned to an object. Values are marked at
both their beginning and end by inverted commas ("). They
can contain maximum 8 ASCII characters. Numeric values
can contain up to 3 digits and a decimal point. Numbers with
more than 3 digits are not accepted. With numbers <1,
leading zeros must be entered. Entry of "1.5" for the flow rate:
&Parameter.A.Flow
" 1.5 "
Correct numeric entries:
"38.5", "0.97"
Incorrect numeric entries:
"1,5" or "+3" or ".13"