Preface, Contents Product Overview 1 Getting Started 2 Installing the S7-200 3 PLC Concepts 4 Programming Concepts, Conventions and Features 5 S7-200 Instruction Set 6 Communicating over a Network 7 Hardware Troubleshooting Guide and Software Debugging Tools 8 Creating a Program for the Position Module 9 Creating a Program for the Modem Module 10 Using the USS Protocol Library to Control a MicroMaster Drive 11 Using the Modbus Protocol Library 12 Technical Specifications A Calculating a Power Budget B Error Codes C Special Memory (SM) Bits D S7-200 Order Numbers E Execution Times for STL Instructions F S7-200 Quick Reference Information G Index S7-200 Programmable Controller System Manual SIMATIC Edition 05/2003 A5E00212536-02 This manual has the order number: 6ES7298-8FA23-8BH0
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Using the USS Protocol Library toControl a MicroMaster Drive
11
Using the Modbus ProtocolLibrary
12
Technical Specifications A
Calculating a Power Budget B
Error Codes C
Special Memory (SM) Bits D
S7-200 Order Numbers E
Execution Times for STLInstructions
F
S7-200 Quick ReferenceInformation
G
Index
S7-200 Programmable ControllerSystem Manual
SIMATIC
Edition 05/2003A5E00212536-02
This manual has the order number:6ES7298-8FA23-8BH0
Contents
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Safety Guidelines
This manual contains notices which you should observe to ensure your own personal safety, as well as toprotect the product and connected equipment. These notices are highlighted in the manual by a warningtriangle and are marked as follows according to the level of danger:
Danger
Danger indicates an imminently hazardous situation which, if not avoided, will result in death or seriousinjury.
Warning
Warning indicates a potentially hazardous situation which, if not avoided, could result in death or seriousinjury.
Caution
Caution used with the safety alert symbol indicates a potentially hazardous situation which, if notavoided, may result in minor or moderate injury.
Caution
Caution used without the safety alert symbol indicates a potentially hazardous situation which, if notavoided, may result in property damage.
Notice
Notice indicates a potential situation which, if not avoided, may result in an undesirable result or state.
Qualified Personnel
Only qualified personnel should be allowed to install and work on this equipment. Qualified persons aredefined 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.
Correct Usage
Note the following:
Warning
This device and its components may only be used for the applications described in the catalog or thetechnical descriptions, and only in connection with devices or components from other manufacturerswhich have been approved or recommended by Siemens.
This product can only function correctly and safely if it is transported, stored, set up, and installedcorrectly, and operated and maintained as recommended.
Trademarks
SIMATICR, SIMATIC HMIR and SIMATIC NETR are registered trademarks of SIEMENS AG.
Some of other designations used in these documents are also registered trademarks; the owner’s rights may be violatedif they are used by third parties for their own purposes.
We have checked the contents of this manual for agreement with the hardware andsoftware described. Since deviations cannot be precluded entirely, we cannot gua-rantee full agreement. However, the data in thismanual are reviewed regularly andany necessary corrections included in subsequent editions. Suggestions for impro-vement are welcomed.
Disclaimer of LiabilityCopyright Siemens AG 2003 All rights reserved
The reproduction, transmission or use of this document or its contents is notpermitted without express written authority. Offenders will be liable for damages.All rights, including rights created by patent grant or registration of a utility modelor design, are reserved.
E Siemens AG 2003Technical data subject to change.
Siemens Aktiengesellschaft 6ES7298-8FA23-8BH0
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PrefaceThe S7-200 series is a line of micro-programmable logic controllers (Micro PLCs) that can control avariety of automation applications. Compact design, low cost, and a powerful instruction set make theS7-200 a perfect solution for controlling small applications. The wide variety of S7-200 models and theWindows-based programming tool give you the flexibility you need to solve your automation problems.
Audience
This manual provides information about installing and programming the S7-200 Micro PLCs and isdesigned for engineers, programmers, installers, and electricians who have a general knowledge ofprogrammable logic controllers.
Scope of the Manual
The information contained in this manual pertains in particular to the following products:
- S7-200 CPU models: CPU 221, CPU 222, CPU 224, CPU 226, and CPU 226XM
- S7-200 EM 22x expansion modules
- STEP 7--Micro/WIN, version 3.2, a 32-bit programming software package for the S7-200
- STEP 7--Micro/WIN Instruction Libraries and TP-Designer for TP070, Version 1.0, a set ofsoftware tools for customers who use an S7-200 with other components, such as the TP070Touch Panel, Modbus, or a MicroMaster drive
Standards Compliance
The SIMATIC S7-200 series meets the following standards:
- European Community (CE) Low Voltage Directive 73/23/EECEN 61131--2: Programmable Controllers -- Equipment requirements
- European Community (CE) EMC Directive 89/336/EEC
- Underwriters Laboratories, Inc.UL 508 Listed (Industrial Control Equipment) Registration number E75310
- Canadian Standards Association: CSA C22.2 Number 142 (Process Control Equipment)
- Factory Mutual Research: FM Class I, Division 2, Groups A, B, C, & D Hazardous Locations, T4Aand Class I, Zone 2, IIC, T4
Refer to Appendix A for compliance information.
Tip
The SIMATIC S7-200 series meets the CSA standard.
The cULus logo indicates that the S7-200 has been examined and certified by UnderwritersLaboratories (UL) to standards UL 508 and CSA 22.2 No. 142.
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Maritime Approvals
The S7-200 products are periodically submitted for special agency approvals related to specific marketsand applications. This table identifies the agency and certificate number that the S7-200 products havebeen approved for. Not all S7-200 products in this manual have been approved for these special agencyapprovals. Consult your local Siemens representative if you need additional information related to thelatest listing of exact approvals by part number.
Agency Certificate Number
Lloyds Register of Shipping (LRS) 99 / 20018(E1)
American Bureau of Shipping (ABS) 01--HG20020--PDA
Germanischer Lloyd (GL) 12 045 -- 98 HH
Det Norske Veritas (DNV) A--8071
Bureau Veritas (BV) 09051 / A2 BV
Nippon Kaiji Kyokai (NK) A--534
How to Use This Manual
If you are a first-time (novice) user of S7-200 Micro PLCs, you should read the entire S7-200Programmable Controller System Manual. If you are an experienced user, refer to the table of contentsor index to find specific information.
The S7-200 Programmable Controller System Manual is organized according to the following topics:
- Chapter 1 (Product Overview) provides an overview of some of the features of the S7-200 familyof Micro PLC products.
- Chapter 2 (Getting Started) provides a tutorial for creating and downloading a sample controlprogram to an S7-200.
- Chapter 3 (Installing the S7-200) provides the dimensions and basic guidelines for installing theS7-200 CPU modules and expansion I/O modules.
- Chapter 4 (PLC Concepts) provides information about the operation of the S7-200.
- Chapter 5 (Programming Concepts, Conventions, and Features) provides information about thefeatures of STEP 7--Micro/WIN, the program editors and types of instructions (IEC 1131-3 orSIMATIC), S7-200 data types, and guidelines for creating programs.
- Chapter 6 (S7-200 Instruction Set) provides descriptions and examples of programminginstructions supported by the S7-200.
- Chapter 7 (Communicating over a Network) provides information for setting up the differentnetwork configurations supported by the S7-200.
- Chapter 8 (Hardware Troubleshooting Guide and Software Debugging Tools) provides informationfor troubleshooting problems with the S7-200 hardware and about the STEP 7--Micro/WINfeatures that help you debug your program.
- Chapter 9 (Creating a Program for the Position Module) provides information about theinstructions and wizard used to create a program for the EM 253 Position module.
- Chapter 10 (Creating a Program for the Modem Module) provides information about theinstructions and wizard used to create a program for the EM 241 Modem module.
- Chapter 11 (Using the USS Protocol Library to Control a MicroMaster Drive) provides informationabout the instructions used to create a control program for a MicroMaster drive. It also providesinformation about how to configure the MicroMaster 3 and MicroMaster 4 drives.
- Chapter 12 (Using the Modbus Protocol Library) provides information about the instructions usedto create a program that uses the Modbus protocol for communications.
- Appendix A (Technical Specifications) provides the technical information and data sheets aboutthe S7-200 hardware.
The other appendices provide additional reference information, such as descriptions of the error codes,descriptions of the Special Memory (SM) area, part numbers for ordering S7-200 equipment, and STLinstruction execution times.
Preface
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Additional Information and Assistance
Information about the S7-200 and STEP 7--Micro/WIN
In addition to this manual, STEP 7--Micro/WIN provides extensive online help for getting started withprogramming the S7-200. Included with the purchase of the STEP 7--Micro/WIN software is a freedocumentation CD. On this CD you can find application tips, an electronic version of this manual andother information.
Online Help
Help is only a keystroke away! Pressing F1 accesses the extensive online help for STEP 7--Micro/WIN.The online help includes useful information about getting started with programming the S7-200, as wellas many other topics.
Electronic Manual
An electronic version of this S7-200 System Manual is available on the documentation CD. You caninstall the electronic manual onto your computer so that you can easily access the information in themanual while you are working with the STEP 7--Micro/WIN software.
Programming Tips
The documentation CD includes Programming Tips, a set of application examples with sampleprograms. Reviewing or modifying these examples can help you find efficient or innovative solutions foryour own application. You can also find the most current version of Programming Tips on the S7-200Internet site.
Internet: www.siemens.com/S7--200
For additional information about Siemens products and services, technical support, frequently askedquestions (FAQs), product updates, or application tips, refer to the following Internet addresses:
- www.ad.siemens.de for general Siemens information
This Siemens Automation & Drives Internet site includes information about the SIMATIC productline and other products available from Siemens.
- www.siemens.com/S7--200 for S7-200 product information
The S7-200 Internet site includes frequently asked questions (FAQs), Programming Tips(application examples and sample programs), information about newly released products, andproduct updates or downloads.
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Technical Assistance and Purchasing S7-200 Products
Local Siemens Sales Office or Distributor
For assistance in answering any technical questions, for training on the S7-200 products, or for orderingS7-200 products, contact your Siemens distributor or sales office. Because your sales representativesare technically trained and have the most specific knowledge about your operations, process andindustry, as well as about the individual Siemens products that you are using, they can provide thefastest and most efficient answers to any problems that you might encounter.
Technical Services
The highly trained staff of the S7-200 Technical Services center is also available to help you solve anyproblems that you might encounter. You can call on them 24 hours a day, 7 days a week:
- For calls originating from within the United States of AmericaLocal time: Monday to Friday 0800 to 1900 Eastern timeTelephone: +1 800 241--4453Fax: +1 (0) 770 740--3699E-Mail: [email protected]
- For calls originating from the Americas outside of the USALocal time: Monday to Friday 0800 to 1900 Eastern timeTelephone: +1 (0) 770 740--3505Fax: +1 (0) 770 740--3699E-Mail: [email protected]
- For calls originating from Europe and AfricaLocal time (Nuremberg): Monday to Friday 0700 to 1700Telephone: +49 (0) 180 5050--222Fax: +49 (0) 180 5050--223E-Mail: [email protected]
- For calls originating from Asia and AustraliaLocal time (Singapore): Monday to Friday 0830 to 1730Telephone: +65 (0) 740--7000Fax: +65 (0) 740--7001E-Mail: [email protected]