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Siemens SIMATIC S7-200 - Hard-Wired Control vs. PLC; Siemens Modular PLC Systems

Siemens SIMATIC S7-200
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vii
S7-200 Programmable Controller System Manual
A5E00066097-02
Contents
1 Introducing the S7-200 Micro PLC 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 Comparing the Features of the S7-200 Micro PLCs 1-2. . . . . . . . . . . . . . . . . .
1.2 Major Components of the S7-200 Micro PLC 1-5. . . . . . . . . . . . . . . . . . . . . . . .
1.3 Maximum I/O Configurations 1-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Installing an S7-200 PLC 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 Panel Layout Considerations 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Installing and Removing an S7-200 Micro PLC or Expansion Module 2-6. . .
2.3 Installing the Field Wiring 2-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4 Using Suppression Circuits 2-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.5 Power Considerations 2-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Getting Started with an S7-200 Programming System 3-1. . . . . . . . . . . . . . . . . . . . .
3.1 Overview 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 Quick Start for STEP 7-Micro/WIN 32 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 How Do I Set Up Communications Using the PC/PPI Cable? 3-5. . . . . . . . . .
3.4 How Do I Complete the Communications Connection? 3-9. . . . . . . . . . . . . . .
3.5 How Do I Change the Communications Parameters for My PLC? 3-10. . . . . .
4 Basic Concepts for Programming an S7-200 CPU 4-1. . . . . . . . . . . . . . . . . . . . . . . . .
4.1 Guidelines for Designing a Micro PLC System 4-2. . . . . . . . . . . . . . . . . . . . . . .
4.2 Concepts of an S7-200 Program 4-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3 Concepts of the S7-200 Programming Languages and Editors 4-6. . . . . . . . .
4.4 Understanding the Differences between SIMATIC and
IEC 1131-3 Instructions 4-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.5 Basic Elements for Constructing a Program 4-18. . . . . . . . . . . . . . . . . . . . . . . . .
4.6 Understanding the Scan Cycle of the CPU 4-22. . . . . . . . . . . . . . . . . . . . . . . . . .
4.7 Selecting the Mode of Operation for the CPU 4-25. . . . . . . . . . . . . . . . . . . . . . .
4.8 Creating a Password for the CPU 4-27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.9 Debugging and Monitoring Your Program 4-30. . . . . . . . . . . . . . . . . . . . . . . . . . .
4.10 Editing in RUN Mode 4-39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.11 Background Time 4-42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.12 Error Handling for the S7-200 CPU 4-43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents

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