Siemens SITRANS P DS III - Page 109

Operator control functions via PROFIBUS
7.4 Settings
SITRANS P DS III with PROFIBUS PA
Operating Instructions, 06/2013, A5E00053276-07
109
You can also adjust the output to another process value. Assign the required unit to the
parameters under the rubric output scaling. Assign the start of scale and full scale values
according to the measured value scaling.
Volume measurement
● Start SIMATIC PDM. Create an assignment between the pressure to be measured
(measurement range) and the volume to be recorded (working range), by setting these
parameters:
>
Input
>
>
Transducer block 1
Transmitter type:
Volume
>
>
>
Measuring range
Start of scale value
Full scale value
>
>
>
Working range
Unit:
Unit of volume [m
3
, dm
3
, cm
3
, mm
3
, l ...]
Start of scale value
Full scale value
● If there is no linear relationship between level and volume in your container, you can also
define a characteristic curve:
>
Input
>
>
Transducer block 1
Transmitter type:
Volume
>
>
>
Characteristic curve
Characteristic curve
type:
User
-defined table
>
>
>
Nodes
New number of
nodes:
max. 31
x[n] measurement
range:
Pressure value
y[n] working range:
Corresponding volume value
● Create an assignment between the measured volume value and the output value by
setting these parameters:
>
Output
>
>
Function block 1 - analog input
Channel:
Measured value (primary variable)
>
>
>
Measured value scaling