PLC_Basics of PLCs_s7-200.pdf

STEP 2000

Basics of PLCs

Table of Contents

Introduction ..............................................................................2

PLCs .........................................................................................4

Number Systems......................................................................8

Terminology ............................................................................ 14

Basic Requirements................................................................23

S7-200 Micro PLCs .................................................................28

Connecting External Devices..................................................39

Programming A PLC ...............................................................41

Discrete Inputs/Outputs .........................................................49

Analog Inputs and Outputs.....................................................61

Timers.....................................................................................64

Counters ................................................................................. 71

High-Speed Instructions .........................................................75

Specialized Expansion Modules .............................................78

Review Answers.....................................................................84

Final Exam ..............................................................................85

Introduction

Welcome to another course in the STEP 2000 series, S iemens

T echnical E ducation P rogram, designed to prepare our

distributors to sell Siemens Energy & Automation products

more effectively. This course covers Basics of PLCs and related

products.

Upon completion of Basics of PLCs you should be able to:

• Identify the major components of a PLC and describe

their functions

• Convert numbers from decimal to binary, BCD, and

hexadecimal

• Identify typical discrete and analog inputs and outputs

• Read a basic ladder logic diagram and statement list

• Identify operational differences between different S7-200

models

• Identify the proper manual to refer to for programming or

installation of an S7-200 PLC

• Connect a simple discrete input and output to an S7-200

• Select the proper expansion module for analog inputs and

outputs

• Describe the operation of timers and counters

This knowledge will help you better understand customer

applications. In addition, you will be better able to describe

products to customers and determine important differences

between products. You should complete Basics of Electricity

before attempting Basics of PLCs . An understanding of many

of the concepts covered in Basics of Electricity is required

for Basics of PLCs . In addition you may wish to complete

Basics of Control Components . Devices covered in Basics

of Control Components are used with programmable logic

controllers.

If you are an employee of a Siemens Energy & Automation

authorized distributor, fill out the final exam tear-out card and

mail in the card. We will mail you a certificate of completion if

you score a passing grade. Good luck with your efforts.

SIMATIC, STEP 7, STEP 7-Micro, STEP 7-Micro/WIN, PG 702,

and PG 740 are registered trademarks of Siemens Energy &

Automation, Inc.

Other trademarks are the property of their respective owners.

PLCs

Programmable Logic Controllers (PLCs), also referred to as

programmable controllers, are in the computer family. They are

used in commercial and industrial applications. A PLC monitors

inputs, makes decisions based on its program, and controls

outputs to automate a process or machine. This course is meant

to supply you with basic information on the functions and

configurations of PLCs.

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika: