Lesson Plan:

Programmable Logic Controller Basics

Date:

March 21-25, 2005

Course No.:

EET3370

Week:

3

Unit:

Unit 1 – Programmable Logic Controllers

Instructor:

Prof. Powers

 

Objective:

Upon completion of this unit, you will be able to:

·         Describe how PLC technology has evolved over the past 30 years.

·         Explain the difference between a PLC and a PC.

·         List the advantages of PLCs over hard-wired relays.

·         Convert between the following number systems:  binary, octal, decimal, and hexadecimal.

·         Explain how positive and negative numbers are stored in PLCs.

·         Demonstrate how on-delay and off-delay timers work.

 

 

Content Outline:

Monday, 3/21/05

Programmable Logic Controllers (PLCs)
            PLC Overview

Wednesday, 3/23/05

Programmable Logic Controllers (PLCs)
            Arithmetic Conversions

            Storing Numbers in PLCs

Friday, 3/25/05

Programmable Logic Controllers (PLCs)
            Review

Lab:  24 or 25 March

3 – Relay Timers

 

 

Reading:

·         Read Chapter 14.

 

 

Assignment:

·         Week 2 Homework:  Questions Q12-6 through Q12-12, Q12-14 and Problem 12-6.

·         Week 3 Homework:  Questions Q14-1 & Q14-2 and problems on reverse.

Show your work for all questions requiring calculations.

·         Lab 3:  Complete and submit per the lab handout.

·         Lab 3 Extra Credit:  Implement your design for homework problem P12.6 on the lab trainer.

 

 

Evaluation:

·         Week 2 Homework due 21 March.

·         Lab 3 and Lab Extra Credit due 24 or 25 March.

·         Week 3 Homework due 28 March.

·         Unit 1 Test – 28 March (on Chapter 12 and 1st two sections of Chapter 14).

 

 

Note:

·         Labs will be performed in teams of two or individually until further notice.

·         Demonstrate proper operation of the above experiments to your instructor.

 

 

Resources:

·         Skvarenina, Tim and DeWitt, William, Electrical Power and Controls, 2nd Edition, Prentice-Hill, 2004

·         http://www.tech.mtu.edu/courses/eet3370/index.htm

·         http://www.radideo.com/mtu/index.htm

·         Instructor at mnpowers@mtu.edu and 906-487-2638.

Week 3 Homework Problems

 

 

Show your work!  (Do not simply use your calculator – demonstrate that you can do the conversions by hand – feel free to use your calculator to confirm you got them right!)

 

 

1.         Convert each of the following binary numbers to decimal numbers:

            a.  1011

            b.  11001101

 

2.         Convert each of the following decimal numbers to binary numbers:

            a.  19

            b.  230

 

3.         Convert each of the following octal numbers to decimal numbers:

            a.  36

            b.  215

 

4.         Convert each of the following octal numbers to binary numbers:

            a.  2551

            b.  130

 

5.         Convert each of the following hexadecimal numbers to decimal numbers:

            a.  5A

            b.  9B5

 

6.         Convert each of the following hexadecimal number to binary numbers:

            a.  4C

            b.  31B

 

7.         Convert each of the following decimal numbers to octal numbers:

            a.  28

            b.  112

 

8.         Convert each of the following decimal numbers to hexadecimal numbers.

            a.  57

            b.  148

 

9.         Convert the following decimal numbers into the 16 bit binary form used
            to store numbers in PLCs.

            a.   289

            b.  –531