Standard

 

ELT 122 – Industrial PLC’s

Course Description:

Introduces operational theory, systems terminology, PLC installations, and programming procedures for programmable logic controls. Emphasis is placed on plc programming, connections, installations, and start-up procedures. Topics include: PLC hardware and software, PLC functions and terminology, introductory numbering systems, PLC installation and set up, PLC programming basics, relay logic instructions, timers and counters, connecting field devices to I/O cards, and PLC safety procedures.

 

Competency Areas:

Hours:

 

 

 

PLC Hardware and Software

Class

4

PLC Functions and Terminology

D. Lab

0

Introductory Numbering Systems

P. Lab/O.B.I.

6

PLC Installation and Setup

Credit

6

PLC Functions and Terminology

 

 

PLC Programming Basics

Relay Logic Instructions

Timers and Counters

Connecting Field Devices to I/O Cards

PLC Safety procedures

 

Prerequisite:

ELT 111, ELT 112, ELT 118

Corequisite:

 

 

Course Guide

 

 

Competency

After completing this section, the student will:

Hours

Class

D. Lab

P. Lab/

O.B.I.

PLC HARDWARE AND SOFTWARE

5

0

7

PLC Components

Identify and discuss functions of all PLC components

 

 

 

PLC Software

Discuss and install DOS and windows versions software.

 

 

 

PLC FUNCTIONS AND TERMINOLOGY

4

0

0

Functions

Discuss functions of the PLC and its role in industry.

 

 

 

Terminology

Discuss common terminology used in PLC applications.

 

 

 

INTRODUCTORY NUMBERING SYSTEMS

3

0

2

Switching logic

Employ a system or method of switching logic for application in a PLC.

 

 

 

 

Recognize binary and digital number systems.

 

 

 

 

Compare binary logic to relay logic.

 

 

 

PLC INSTALLATION AND SETUP

4

0

7

Installation

Completely install a PLC processor, power supply, and I/O cards.

 

 

 

Set up

Load software and set up the PLC for operation.

 

 

 

PLC PROGRAMMING BASICS

4

0

10

Processor Memory Organization

Discuss the processor memory organization.

 

 

 

Program Scan

Discuss the program scan.

 

 

 

PLC Programming Language and Bit Patterns

Discuss PLC programming languages and bit patterns.

 

 

 

Programming instructions and addressing

Discuss programming instructions and addressing.

 

 

 

 

Execute a ladder logic rung and address inputs and outputs.

 

 

 

RELAY LOGIC INSTRUCTIONS

5

0

12

Relay Logic Instructions

Discuss and execute examine on, examine off, output energize, latch and unlatch.

 

 

 

 

Write and execute a ladder logic rung using these instructions.

 

 

 

TIMERS AND COUNTERS

5

0

10

Timer on and Timer Off

Discuss and execute timer on, timer off, retentive timers, and timers reset.

 

 

 

Counter Up and Counter Down

Discuss and execute counter up, counter down, and counter reset.

 

 

 

CONNECTING FIELD DEVICES TO I/O CARDS

5

0

10

Input

Install switches and other control devices to input cards and address the terminals.

 

 

 

Outputs

Install relays, indicator lights, solenoids, and motor starters to input cards and address the terminals.

 

 

 

 

Write program files using relay instructions, edit program file, download to process, go online, and execute.

 

 

 

PLC SAFETY PROCEDURES

5

0

2

Grounding

Discuss techniques for discrete I/O signal communication.

 

 

 

Forcing

Discuss the hazards of forcing inputs/outputs.

 

 

 

Leaky inputs and outputs

Discuss hazards of leaky inputs and outputs.

 

 

 

 

Check for leaky triacs, SCR’s and transistors.

 

 

 

Wiring

Discuss safe methods of installing power and control cable.

 

 

 

 

Install power and control cables.

 

 

 

 

Suggested Resources

 

Books:

 

Petruzella, F. D. (1989), Programmable Logic Controllers. New York: McGraw-Hill.

Rexford, K. B. (1991), Electrical Control for Machines (4th ed.). Albany, N.Y.: Delmar.

Swanson, F. (1992),  A Systems Approach to Programmable Controllers. Albany, N.Y.: Delmar.

Morriss, S. Brain (2000). Programmable Logic Controllers. NJ.: Prentice Hall.

Geller, David A. (2002), Programmable Controllers (Using the Allen-Bradley SLC – 500 Family). NJ,: Prentice Hall

 

Technical Manuals:

 

Rockwell PLC Technical Manuals

Siemans Technical Manuals

GE Technical Manuals

 

Audio Visuals:

 

Primedia PLC series

Coastal PLC series