WaterMaster
Electromagnetic flowmeter
Appendix A – PROFIBUS-PA Block Structure Diagrams
IM/WMPBST–EN Rev. B
63
A.4 Flow Transducer Block
The Flow Transducer Block describes the basic set of parameters for flow devices.
Fig. A.8 AO Block Algorithm
Fig. A.9 TB Flow Functional Diagram
FB-Algorithms
SP
PV_SCALE
OUT_SCALE
READBACK
Temp = (PV – EU 0%) / (EU 100% – EU 0%)
OUT
PV
READBACK = Temp (EU 100% – EU 0%) + EU 0%
Temp = (SP – EU 0%) / (EU 100% – EU 0%)
OUT = Temp (EU 100% – EU 0%) + EU 0%
PV_SCALE PV_SCALE PV_SCALE
OUT_SCALE
OUT_SCALE
OUT_SCALE
OUT_SCALE
OUT_SCALE
OUT_SCALE
PV_SCALE PV_SCALE PV_SCALE
Flow Transducer Block
Signal
Conditioning
Sensor
Signal
Processing,
Normalization
Unit and Limit
Computation
Totalizer
Analog
input
Sensor Data
(for example, Nominal Size)
Process Data
(for example, Low Flow Cut)
Units
Limits
Raw Signals
Conditioned
Signals
Raw_quantities
(for example, Flow Rate)
Quantities
(for example, Density)