User Guide

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