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Table of ContentsIntroduction ............................................................................. 2PLCs........................................................................................ 4Number Systems .................................................................... 8Terminology ........................................................................... 14

Basic e!uirements .............................................................. 2"S#$2%% &icro PLCs ................................................................ 28Connecting '(ternal )e*ices ................................................ "+Programming , PLC .............................................................. 41)iscrete In-uts/ut-uts ........................................................ 4+

 ,nalog In-uts and /ut-uts .................................................... 01Timers ................................................................................... 04Counters................................................................................ #1ig$S-eed Instructions ........................................................ #3Netor5 Communications..................................................... #8e*ie ,nsers ................................................................... 81

6inal '(am ............................................................................. 822

Introduction7elcome to anoter course in te ST'P 2%%% series SiemensTecnical Education Program designed to -re-are our distributors to sell Siemens 'nergy 9 ,utomation -roductsmore effecti*ely. Tis course co*ers Basics of PLCs and related-roducts.:-on com-letion of Basics of PLCs you sould be able to;

< Identify te ma=or com-onents of a PLC and describe

teir functions< Con*ert numbers from decimal to binary BC) and

e(adecimal

< Identify ty-ical discrete and analog in-uts and out-uts

< ead a basic ladder logic diagram and statement list

< Identify o-erational differences beteen different S#$2%%

models

< Identify te -ro-er manual to refer to for -rogramming or 

installation of an S#$2%% PLC

< Connect a sim-le discrete in-ut and out-ut to an S#$2%%

< Select te -ro-er e(-ansion module for analog in-uts andout-uts

< )escribe te o-eration of timers and counters"Tis 5noledge ill el- you better understand customer a--lications. In addition you ill be better able to describe-roducts to customers and determine im-ortant differencesbeteen -roducts. >ou sould com-lete Basics of Electricity

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before attem-ting Basics of PLCs. ,n understanding of many of te conce-ts co*ered in Basics of Electricity is re!uired for Basics of PLCs. In addition you may is to com-lete Basicsof Control Components. )e*ices co*ered in Basics of Control Components are used it -rogrammable logic

controllers.If you are an em-loyee of a Siemens 'nergy 9 ,utomationautori?ed distributor fill out te final e(am tear$out card andmail in te card. 7e ill mail you a certificate of com-letion if you score a -assing grade. @ood luc5 it your efforts.SI&,TIC ST'P # ST'P #$&icro ST'P #$&icro7IN P@ #%2and P@ #4% are registered trademar5s of Siemens 'nergy 9

 ,utomation Inc./ter trademar5s are te -ro-erty of teir res-ecti*e oners.