Preface

Purpose
The S7-200 series is a line of micro-programmable logic controllers (Micro PLCs) that can
control a variety of automation applications. Compact design, low cost, and a powerful
instruction set make the S7-200 controllers a perfect solution for controlling small
applications. The wide variety of CPU sizes and voltages, and the multiple programming
options available, give you the flexibility you need to solve your automation problems.
This manual provides information about installing and programming the S7-200 Micro PLCs,
including the following topics:

Installing and wiring the S7-200 CPU and expansion I/O modules, and installing the
STEP 7-Micro/WIN software

Designing and entering a program

Understanding the CPU operations, such as data types and addressing modes, the CPU
scan cycle, password-protection, and network communication
This manual also includes descriptions and examples for the programming instructions,
typical execution times for the instructions, and the data sheets for the S7-200 equipment.

Audience
This manual is designed for engineers, programmers, installers, and electricians who have a
general knowledge of programmable logic controllers.

Scope of the Manual
The information contained in this manual pertains in particular to the following products:

S7-200 CPU models: CPU 212 Release 1.01, CPU 214 Release 1.01,
CPU 215 Release 1.02, and CPU 216 Release 1.02

Version 2.1 of STEP 7-Micro/WIN programming software packages:
– STEP 7-Micro/WIN 16 for the 16-bit Windows 3.1x
– STEP 7-Micro/WIN 32 for the 32-bit Windows 95 and Windows NT

Agency Approvals
The SIMATIC S7-200 series meets the standards and regulations of the following agencies:

European Community (CE) Low Voltage Directive 73/23/EEC

European Community (CE) EMC Directive 89/336/EEC

Underwriters Laboratories, Inc.: UL 508 Listed (Industrial Control Equipment)

Canadian Standards Association: CSA C22.2 Number 142 Certified (Process Control
Equipment)

Factory Mutual Research: FM Class I, Division 2, Groups A, B, C, & D Hazardous
Locations, T4A

VDE 0160: Electronic equipment for use in electrical power installations
Refer to Appendix A for compliance information.

Related Information
Refer to the following documentation for more detailed information about selected topics:

ET 200 Distributed I/O System Manual: describes how to install and use the ET 200
products for distributed I/O.

Process Field Bus (PROFIBUS) standard (EN 50170): describes the standard protocol
for the S7-200 DP communication capability.

TD 200 Operator Interface User Manual: describes how to install and use the TD 200
with an S7-200 programmable logic controller.

How to Use This Manual
If you are a first-time (novice) user of S7-200 Micro PLCs, you should read the entire manual.
If you are an experienced user, refer to the table of contents or index to find specific
information.
The manual is organized according to the following topics:

“Introducing the S7-200 Micro PLC” (Chapter 1) provides an overview of some of the
features of the equipment.

“Installing an S7-200 Micro PLC” (Chapter 2) provides procedures, dimensions, and
basic guidelines for installing the S7-200 CPU modules and expansion I/O modules.

“Installing and Using the STEP 7-Micro/WIN Software” (Chapter 3) describes how to
install the programming software. It also provides a basic explanation about the features
of the software.

“Getting Started with a Sample Program” (Chapter 4) helps you enter a sample program,
using the STEP 7-Micro/WIN software.

“Additional Features of STEP 7-Micro/WIN” (Chapter 5) describes how to use the TD 200
Wizard and the S7-200 Instruction Wizard, and other new features of STEP 7-Micro/WIN.

“Basic Concepts for Programming an S7-200 CPU” (Chapter 6), “CPU Memory: Data
Types and Addressing Modes” (Chapter 7), and “Input/Output Control” (Chapter 8)
provide information about how the S7-200 CPU processes data and executes your
program.

“Network Communications and the S7-200 CPU” (Chapter 9) provides information about
how to connect the S7-200 CPU to different types of networks.

“Instruction Set” (Chapter 10) provides explanations and examples of the programming
instructions used by the S7-200 CPUs.
Additional information (such as the equipment data sheets, error code descriptions,
execution times, and troubleshooting) are provided in the appendices.

Additional Assistance
For assistance in answering technical questions, for training on this product, or for ordering,
contact your Siemens distributor or sales office.
For Internet information about Siemens products and services, technical support, or FAQs
(frequently asked questions) and application tips, use this Internet address:
http://www.ad.siemens.de