Siemens Simatic S7-300 User manual

Preface, Contents

Requirements for Working with

the Primer 1

Defining and Structuring the

Control Task 2

Installing and Wiring Your

S7-300 3

Working with the STEP 7

Programming Software 4

Configuring and Assigning

Parameters to Your S7-300 5

Programming Logic Blocks with

STEP 7 6

Downloading and Testing Your

User Program 7

Glossary, Index

C79000-G7076-C500-01

S7-300 Programmable

Controller

Quick Start

Primer

SIMATIC

Primer: S7-300 Programmable Controller, Quick Start

C79000 G7076 C500 01

This manual contains notices which you should observe to ensure your own personal safety, as well asto

protect the product and connected equipment. These notices are highlighted in the manual by a warning

triangle and are marked as follows according to the level of danger:

!Danger

indicatesthatdeath,severepersonalinjuryorsubstantialpropertydamagewillresultifproperprecautionsare

not taken.

!Warning

indicatesthatdeath,severepersonalinjuryorsubstantialpropertydamagecanresultifproperprecautionsare

not taken.

!Caution

indicates that minor personal injury or property damage can result if proper precautions are not taken.

Note

drawsyourattentiontoparticularlyimportantinformationontheproduct,handlingtheproduct,ortoaparticular

part of the documentation.

The device/system may only be set up and operated in conjunction with this manual.

Only qualified personnel should be allowed to install and work on this equipment. Qualified persons are

defined as persons who are authorized to commission, to ground, and to tag circuits, equipment, and sys-

tems in accordance with established safety practices and standards.

Note the following:

!Warning

Thisdeviceanditscomponentsmayonlybeusedfortheapplicationsdescribedinthecatalogorthetechnical

description, and onlyinconnectionwith devicesor components fromother manufacturers whichhave been

approved or recommended by Siemens.

Thisproductcanonlyfunctioncorrectlyandsafelyifitistransported,stored,setup,andinstalledcorrectly,and

operated and maintained as recommended.

SIMATICRand SINECRare registered trademarks of SIEMENS AG.

Third parties using for their own purposes any other names in this document which refer to

trademarks might infringe upon the rights of the trademark owners.

We have checked the contents of this manual for agreement with the

hardwareandsoftwaredescribed.Sincedeviationscannotbeprecluded

entirely, we cannot guarantee full agreement. However, the data in this

manualarereviewedregularlyandanynecessarycorrectionsincludedin

subsequent editions. Suggestions for improvement are welcomed.

Technical data subject to change.

ESiemens AG 1996

Thereproduction,transmissionoruseofthisdocumentoritscontentsis

notpermittedwithoutexpresswrittenauthority.Offenderswillbeliablefor

damages.Allrights,includingrightscreatedbypatentgrantorregistration

of a utility model or design, are reserved.

Siemens AG

AutomationGroup

IndustrialAutomation Systems

Postfach4848, D-90327Nürnberg

Siemens Aktiengesellschaft C79000-G7076-C500

Safety Guidelines

Qualified Personnel

Correct Usage

Trademarks

iii

Primer: S7-300 Programmable Controller, Quick Start

C79000-G7076-C500-01

Preface to the Primer

Hold on there. You weren’t going

to continue without reading the

Preface, were you?

The Preface gives you an overview of the information contained in the Primer.

iv Primer: S7-300 Programmable Controller, Quick Start

C79000-G7076-C500-01

With this Primer, we aim to show you how easily you can install the S7-300

programmable logic controller and program it with the relevant STEP 7

programming software.

The Primer supports you with:

SSimple step-by-step instructions and

SAn easily understandable sample program that leads you through the

entire programming procedure and which can be used as a basis for your

own program.

If you have not yet had any experience with our SIMATIC programmable

controllers, this Primer will provide you with the information you need as a

first-time user.

The form and content of the Primer are such that you can work through it

chapter by chapter.

The individual chapters describe what you have to do in chronological order.

Our intention here is to provide you with a ‘connecting thread’ that you can

follow when installing and programming your S7-300 programmable

controller.

The following page gives you an overview of the contents of the individual

chapters to help you find your way around the Primer.

First, here’s an overview before

you start working with the

Primer!

Aims of the Primer

Structure of the

Primer

Preface to the Primer

What Does This Primer Describe?

Primer: S7-300 Programmable Controller, Quick Start

C79000-G7076-C500-01

The individual chapters of the Primer provide you with the following

information and procedures:

SChapter 1: Requirements for Working with the Primer

This chapter lists the hardware and software requirements for working

with the Primer.

SChapter 2: Defining and Structuring the Control Task

Using the TLIGHT sample program, we show how you can design a

program for a specific control task and how the program is then executed

by your programmable controller.

SChapter 3: Installing and Wiring Your S7-300

In this chapter, we explain the minimum components required to make up

an S7-300 and how you can install and wire your S7-300 and connect it to

a programming device or PC.

SChapter 4: Working with the STEP 7 Programming Software

Here, you learn how to use the STEP 7 programming software. In

addition, you are also introduced to the STEP 7 objects with which you

will work.

SChapter 5: Configuring and Assigning Parameters to Your S7-300

This chapter tells you how you can configure and assign parameters to

your S7-300 in order to adapt it to your requirements.

SChapter 6: Programming Logic Blocks with STEP 7

This chapter contains examples for programming in the STEP 7

languages STL (statement list), LAD (ladder logic), and FBD (function

block diagram).

SChapter 7: Downloading and Testing Your User Program

Finally, we show you how to proceed when you want to download your

user program to the CPU and test it.

What Does Each

Chapter Contain?

Chap.1

Chap.2

Chap.3

Chap.4

Chap.5

Chap.6

Chap.7

Preface to the Primer

vi Primer: S7-300 Programmable Controller, Quick Start

C79000-G7076-C500-01

Preface to the Primer

vii

Primer: S7-300 Programmable Controller, Quick Start

C79000-G7076-C500-01

Contents

Preface to the Primer iii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1 Requirements for Working with the Primer 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Hardware Requirements 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Software Requirements 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Other References for This Chapter 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 Defining and Structuring the Control Task 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

How Do You Design a Control Task? 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

How to Define and Structure Your Control Task 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Other References for This Chapter 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 Installing and Wiring Your S7-300 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

What Do You Need to Know Before you Start? 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

How Do You Install Your S7-300? 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

How Do You Wire Your S7-300? 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

How Do You Connect Your Programming Device/PC? 3-6. . . . . . . . . . . . . . . . . . . . . . . . .

Other References for This Chapter 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 Working with the STEP 7 Programming Software 4-1. . . . . . . . . . . . . . . . . . . . . . . . . .

What is STEP 7? 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

How Do You Work with STEP 7? 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Which STEP 7 Objects Should You Know? 4-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

This is How You Create a Project Structure! 4-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Other References for This Chapter 4-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5 Configuring and Assigning Parameters to Your S7-300 5-1. . . . . . . . . . . . . . . . . . . . .

What is Configuring and Assigning Parameters? 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

How to Configure and Assign 5-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

First Perform a Memory Reset of Your CPU! 5-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

How Do You Configure and Assign Parameters to Your S7-300? 5-5. . . . . . . . . . . . . . . .

What Does a Configuration Table Look Like? 5-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Other References for This Chapter 5-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

viii Primer: S7-300 Programmable Controller, Quick Start

C79000-G7076-C500-01

6 Programming Logic Blocks with STEP 7 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Procedure for Programming Blocks 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

How Do You Create the Required Blocks? 6-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

What are STL, LAD, and FBD? 6-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

How Do You Program Blocks in STL? 6-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

How Do You Program Blocks in LAD? 6-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

How Do You Program Blocks in FBD? 6-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Other References for This Chapter 6-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7 Downloading and Testing Your User Program 7-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Basic Procedure for Downloading and Testing 7-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

How Do You Download the User Program to Your S7-300? 7-3. . . . . . . . . . . . . . . . . . . .

What Do You Have to Know about Testing? 7-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

How Do You Test Your STL Program? 7-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

How Do You Test Your LAD Program? 7-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

How Do You Test Your FBD Program? 7-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Other References for This Chapter 7-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Glossary

Index

Contents

1-1

Primer: S7-300 Programmable Controller, Quick Start

C79000-G7076-C500-01

Requirements for Working with the Primer

You mean to say,

this is all you need for working

with the Primer?

We have made every effort to keep the hardware and software requirements for working with

the Primer to a minimum.

1-2 Primer: S7-300 Programmable Controller, Quick Start

C79000-G7076-C500-01

For working with the Primer and executing the TLIGHT sample program,

you require the following hardware components:

Component Function Illustration

Rail ... functions as a mounting rack for

an S7-300.

Power supply module (PS) ... converts the supply voltage

(120/230 VAC) to 24 VDC operating

voltage for supplying the S7-300.

CPU (central processing unit)

Backup battery (optional)

... executes the user program;

supplies the S7-300 backplane bus

with 5 V; communicates via the MPI

(multipoint interface) with other

CPUs, or with a programming

device/PC.

Simulator module (6ES7 374...) with

8 digital inputs and 8 digital outputs ... gives you the option of testing the

user program on startup and during

operation by simulating sensor

signals via switches and displaying

signal states at the outputs via LEDs.

MPI cable ... connects a programming

device/PC with a CPU.

Programming device (PG) with an

MPI module and pre-installed

STEP 7 software

... configures, assigns parameters,

programs, and tests the S7-300

programmable controller.

Personal computer (PC) with an MPI

module or PC/MPI cable with

pre-installed STEP 7 software

... configures, assigns parameters,

programs, and tests the S7-300

programmable controller.

What Hardware Do

You Need?

Requirements for Working with the Primer

Hardware Requirements

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