Flow Transducer Block - ABB PROFIBUS FEX100-DP User Manual

WaterMaster
Electromagnetic flowmeter
SP
PV_SCALE
OUT_SCALE
READBACK
Fig. A.8 AO Block Algorithm
A.4 Flow Transducer Block
The Flow Transducer Block describes the basic set of parameters for flow devices.
Raw Signals
Sensor
(for example, Nominal Size)
Fig. A.9 TB Flow Functional Diagram
IM/WMPBST–EN Rev. B
FB-Algorithms
Temp = (SP – EU 0%) / (EU 100% – EU 0%)
PV_SCALE PV_SCALE PV_SCALE
OUT = Temp (EU 100% – EU 0%) + EU 0%
OUT_SCALE
Temp = (PV – EU 0%) / (EU 100% – EU 0%)
OUT_SCALE
READBACK = Temp (EU 100% – EU 0%) + EU 0%
PV_SCALE PV_SCALE PV_SCALE

Flow Transducer Block

Conditioned
Signals
Signal
Conditioning
Normalization
Sensor Data
Process Data
(for example, Low Flow Cut)
Appendix A – PROFIBUS-PA Block Structure Diagrams
OUT_SCALE OUT_SCALE
OUT_SCALE OUT_SCALE
Raw_quantities
(for example, Flow Rate)
Signal
Unit and Limit
Processing,
Computation
Units
OUT
PV
Quantities
(for example, Density)
Totalizer
Analog
input
Limits
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