Siemens SITRANS P DS III - Page 113

Operator control functions via PROFIBUS
7.4 Settings
SITRANS P DS III with PROFIBUS PA
Operating Instructions, 06/2013, A5E00053276-07
113
Channel:
Measurement value (primary variable)
>
>
>
Measured value scaling
Start
-of-scale value:
Final value:
as in "working range"
as in "working range"
>
>
>
Output scaling
Unit:
Start value:
Final value:
as in "work
ing range"
as in "working range"
as in "working range"
● To acquire an amount that has flowed (mass or volume), use the totalizer function block.
>
Output
>
>
Totalizer function block
Channel:
Measurement value (primary variable)
Unit (totalizer)
● If your desired configuration does not include the mode settings (reset totalizer or mode),
set the following parameters as well with SIMATIC PDM:
>
Output
>
>
Totalizer function block
>
>
>
Operating mode
Operating mode:
Totalizer output:
[Pos. a
nd neg. values | only positive values]
Count
Application point of the root function, creep quantity suppression
If you want to suppress the error that occurs at low flow quantities, you have two options that
you can also combine:
● The application point of the root function determines the point below which the root
function becomes linear.
● Creep quantity suppression sets the measured flow quantity to 0, when the value falls
below the preset limit.
Enter the application point as a % of the operating range (volume flow).