Owner's manual
Table Of Contents
- Foundation™ Fieldbus Blocks
- Foundation™ Fieldbus Technology and Fieldbus FunctionBlocks
- Analog Input (AI) FunctionBlock
- Analog Output (AO) Function Block
- Arithmetic Function Block
- Discrete Input (DI) Function Block
- Discrete Output (DO) Function Block
- Integrator (INT) FunctionBlock
- Input Selector (ISEL) FunctionBlock
- Proportional/Integral/Derivative (PID) Function Block
- Signal Characterizer (SGCR) Function Block
- Diagnostics (ADB) Transducer Block
- Applications
- Analog input (AI) Function Block
- Analog Output (AO) Function Block
- Arithmetic (ARTH) Function Block
- Discrete Input (DI) Function Block
- Discrete Output (DO) Function Block
- Input Selector (ISEL) Function Block
- Integrator (INT) Function Block
- Proportional/ Integral/Derivative (PID) Function Block
- Signal Characterizer (SGCR) Function Block
- Index
FOUNDATION
TM
Fieldbus Blocks Manual
A-2
Application Example: Pressure
Transmitter used to Measure
Level in an Open Tank
Situation #1 The level of an open tank is to be measured using a pressure tap at the
bottom of the tank. The level measurement will be used to control the
level of liquid in the tank. The maximum level at the tank is 16 ft. The
liquid in the tank has a density that makes the level correspond to a
pressure of 7.0 psi at the pressure tap (see Figure A-2).
Figure A-2. Situation #1 Diagram
Solution to Situation #1 Table A-2 lists the appropriate configuration settings, and Figure A-3
illustrates the correct function block configuration.
Figure A-3. Function Block Diagram for
aPressureTransmitterusedinLevel
Measurement.
16 ft
7.0 psi measured at
the transmitter
Full Tank
FIELDBUS-3244MV-3244A_01A
TABLE A-2. Analog Input Function Block Configuration for a
Pressure Transmitter used in Level Measurement (situation #1).
Parameter Configured Values
L_TYPE Indirect
XD_SCALE 0 to 7 psi
OUT_SCALE 0 to 16 ft
Analog
Measurement
AI
Function
Block
OUT_D
OUT
PID
Function
Block
AO
Function
Block
BKCAL_IN
CAS_IN
CAS_IN
OUT
BKCAL_OUT