Process Control
Student Guide
VERSION
1.0
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ISBN 1-928982-36-0
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ERRATA
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Table of Contents ·
Page i
Table of Contents
Preface........................................................................................................................iii
Educator Resources.................................................................................................. iv
The Stamps In Class Educational Series................................................................... v
Foreign Translations ................................................................................................. vi
Special Contributors.................................................................................................. vi
Chapter 1: Process Control and Flowcharts ...........................................................1
What is Process Control?...........................................................................................1
Activity #1: Flowcharts for Representing Processes ..................................................3
Activity #2: Sequential Flow and Code.......................................................................6
Activity #3: Flow and Coding with Conditional Branches .........................................12
Activity #4: Predefined Processes with Subroutines ................................................16
Activity #5: Conditional Looping ...............................................................................20
Conclusion ...............................................................................................................24
Solutions to Chapter 1 Challenges...........................................................................25
Chapter 2: PC Based Monitoring and Control .......................................................29
Activity #1: Using StampPlot for Monitoring and Control .........................................29
Activity #2: StampPlot Interactive Control ................................................................35
Activity #3: StampPlot Toolbar Controls...................................................................37
Activity #4: Specialized Interface Controls ...............................................................40
Conclusion ...............................................................................................................43
Solutions to Chapter 2 Challenges...........................................................................43
Chapter 3: Digital Input Conditioning.....................................................................45
Activity #1: Measuring the Threshold Voltage..........................................................45
Activity #2: Night-Light Process ...............................................................................51
Activity #3: Uncommited Inputs and Conditioning Switches ....................................53
Activity #4: The Transistor as a Switch ....................................................................57
Activity #5: Effects of Resistor Sizing .......................................................................66
Activity #6: Switching Configuration Comparisons...................................................70
Activity #7: Typical Industrial Switches ....................................................................73
Conclusion ...............................................................................................................78
Solutions to Chapter 3 Challenges...........................................................................79
Chapter 4: Sequential Processes and Optical Switches ......................................83
Activity #1: Connecting and Testing the Opto-Reflective Switch .............................84
Activity #2: Batch or Sequential Process Control.....................................................91
Activity #3: Production Logs...................................................................................101
Activity #4: Box Conveyor Belt – Counting and Edge Detection ............................104
Activity #5: Input Bounce and Spurious Signals.....................................................111
Activity #6: Tachometer – High-Speed Counting ...................................................114
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