Siemens SITRANS P DS III - Page 112

Operator control functions via PROFIBUS
7.4 Settings
SITRANS P DS III with PROFIBUS PA
112 Operating Instructions, 06/2013, A5E00053276-07
Desired configuration
Measurement type
Output, reset totalizer output, mode Current flow/time,
volume or mass that has flowed over a time
segment,
Dosing,
Controlling the mode of the totalizer from the user
program: Net, forward flow, reverse flow, hold
totalizer count
Totalizer output, reset totalizer output Volume or mass that has flowed over a time
segment,
Dosing
Totalizer output, reset totalizer output, mode Volume or mass that has flowed over a time
segment,
Dosing,
Controlling the mode of the totalizer from the user
program: Net, forward flow, reverse flow, hold
totalizer count
● Create a device with measurement type "Flow".
● Start SIMATIC PDM. Create an assignment between the pressure to be measured
(measurement range) and the volume or mass flow to be recorded (working range), by
setting these parameters:
>
Input
>
>
Transducer Block 1
Transmitter type:
Flow
>
>
>
Measuring range
S
tart-of-
scale value:
Final value
0
>
>
>
Working area
Unit:
Volume unit/time unit [m3/s, m3/h, l/s, ...]
Mass unit/time unit [kg/s, t/min, ...]
Start
-of-scale value
Final value
0
>
>
>
Characteristic curve
Characteristic curve
type:
Root ex
tracted
● To acquire the current flow, use "Function Block 1 – Analog Input". Create an assignment
between the measured flow value and the output value by setting these parameters:
>
Output
>
>
Function Block 1 - Analog Input