Siemens SITRANS P DS III - Page 219

Technical data
13.9 PROFIBUS communication
SITRANS P DS III with PROFIBUS PA
Operating Instructions, 06/2013, A5E00053276-07
219
PROFIBUS PA communication
Function blocks
2
• Analog input
Adaptation to user-specific process variable
Yes, linearly rising or falling characteristic
Adjustable electrical damping
0 ... 100 s
Simulation function
Output/input
Failure response Can be parameterized:
• Last good value
• Substitute value
• Faulty value
Limit monitoring
Upper and lower warning and alarm limits
• Totalizer • Can be reset and preset
• Selectable counting direction
• Simulation function of totalizer output
Failure response Can be parameterized:
• Addition with last good value
• Stop addition
• Addition with faulty value
Limit monitoring
Upper and lower warning and alarm limits
• Physical block
1
Transducer blocks
2
• Transducer block "Pressure"
Calibration by applying two pressures
Yes
Monitoring of sensor limits
Yes
Input of a container characteristic
With max. 30 interpolation points
Characteristic curve
• Linear
• Square-root
Not for gauge and absolute pressures
Low-flow cut-off and starting point of square-
rooting
Not for gauge and absolute pressures
Parameterizable
Simulation function
• Pressure measurement • Constant value
• Parameterizable ramp function
• Sensor temperature • Constant value
• Parameterizable ramp function
• Transducer block "Electronics temperature"
Simulation function