National Instruments FP-3000 Chapter 3 Example Applications

Contents
FieldPoint FP-3000 User Manual vi
© National Instruments Corporation
Chapter 3
Example Applications
Initial Power On: Assigning Address and Device Tag.................................................. 3-1
Example 1: Converting a 4–20 mA Pressure Sensor to Fieldbus Using FP-3000........ 3-2
Getting Started................................................................................................3-2
Convert the Pressure Sensor Reading............................................................. 3-2
Create Function Block......................................................................3-2
Assign a Tag to the New Block........................................................3-3
Select the Module and Channel........................................................3-3
Set the Input Range...........................................................................3-4
Scale the Reading............................................................................. 3-4
Set Up Scheduling............................................................................3-5
Bring the Block Online.....................................................................3-6
Example 2: Temperature Control with the FP-3000..................................................... 3-6
Getting Started................................................................................................3-6
Taking Temperature Readings........................................................................ 3-7
Create an FP-TC-120 Block.............................................................3-7
Assign a Tag to the New Block........................................................3-7
Select the Module and Channel........................................................3-7
Set the Input Range and Thermocouple Type.................................. 3-8
Scale the Reading............................................................................. 3-8
Set Up Scheduling............................................................................3-9
Bring the Block Online.....................................................................3-10
Controlling a Heating Element....................................................................... 3-10
Instantiate an FP-AO-200 Block...................................................... 3-10
Assign a Tag to the New Block........................................................3-10
Select the Module and Channel........................................................3-11
Set the Output Range........................................................................3-11
Scale the Output................................................................................3-11
Set Up Scheduling............................................................................3-12
Bring the Block Online.....................................................................3-12
PID Control.....................................................................................................3-13
Instantiate a PID Block.....................................................................3-13
Assign a Tag to the New Block........................................................3-13
Scale the PID....................................................................................3-13
Connect the PID to the AI and AO Blocks.......................................3-14
Download and Bring the Loop into Auto......................................... 3-14
Tune the PID.....................................................................................3-15
Alarming.........................................................................................................3-15