Nội dung

s Welcome to STEP 7, Contents SIMATIC Introduction to STEP 7 1 The SIMATIC Manager 2 Programming with Symbols 3 Creating a Program in OB1 4 Creating a Program with Function Blocks and Data Blocks 5 Configuring the Central Rack 6 Downloading and Debugging the Program 7 Programming a Function 8 Programming a Shared Data Block 9 Working with STEP 7 V5.3 Getting Started Programming a Multiple Instance 10 Configuring the Distributed I/O 11 Appendix Appendix A Index This manual is part of the documentation package with the order number: 6ES7810-4CA07-8BW0 Edition 01/2004 A5E00261403-01 A Safety Guidelines This manual contains notices intended to ensure personal safety, as well as to protect the products and connected equipment against damage. These notices are highlighted by the symbols shown below and graded according to severity by the following texts: ! Danger ! Warning ! Caution indicates that death, severe personal injury or substantial property damage will result if proper precautions are not taken. indicates that death, severe personal injury or substantial property damage can result if proper precautions are not taken. indicates that minor personal injury can result if proper precautions are not taken. Caution indicates that property damage can result if proper precautions are not taken. Notice draws your attention to particularly important information on the product, handling the product, or to a particular part of the documentation. Qualified Personnel 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 systems 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 the technical description, and only in connection with devices or components from other manufacturers which have been approved or recommended by Siemens. This product can only function correctly and safely if it is transported, stored, set up, and installed correctly, and operated and maintained as recommended. Trademarks SIMATIC®, SIMATIC HMI® and SIMATIC NET® are 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. Copyright © Siemens AG 2004 All rights reserved Disclaimer of Liability The reproduction, transmission or use of this document or its contents is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved. We have checked the contents of this manual for agreement with the hardware and software described. Since deviations cannot be precluded entirely, we cannot guarantee full agreement. However, the data in this manual are reviewed regularly and any necessary corrections included in subsequent editions. Suggestions for improvement are welcomed. Siemens AG Bereich Automation and Drives Geschaeftsgebiet Industrial Automation Systems Postfach 4848, D- 90327 Nuernberg ©Siemens AG 2004 Technical data subject to change. Siemens Aktiengesellschaft A5E00261403-01 Welcome to STEP 7... ...the SIMATIC standard software for creating programmable logic control programs in Ladder Logic, Function Block Diagram, or Statement List for SIMATIC S7-300/400 stations. About This Getting Started Manual In this manual, you will get to know the basics of SIMATIC STEP 7. We will show you the most important screen dialog boxes and the procedures to follow using practical exercises, which are structured so that you can start with almost any chapter. Each section is split into two parts: a descriptive part, marked in gray, and a process-oriented part, marked in green. The instructions start with an arrow in the green margin and may be spread out over several pages, finishing in a full stop and a box containing related topics. Previous experience of working with the mouse, window handling, pull-down menus, etc. would be useful, and you should preferably be familiar with the basic principles of programmable logic control. The STEP 7 training courses provide you with in-depth knowledge above and beyond the contents of this Getting Started manual, teaching you how entire automation solutions can be created with STEP 7. Requirements for Working with the Getting Started Manual In order to carry out the practical exercises for STEP 7 in this Getting Started manual, you require the following: • A Siemens programming device or a PC • The STEP 7 software package and the respective license key • A SIMATIC S7-300 or S7-400 programmable controller (for Chapter 7 "Downloading and Debugging the Program"). Additional Documentation on STEP 7 • STEP 7 Basic Information • STEP 7 Reference Information After you have installed STEP 7, you will find the electronic manuals in the Start menu under Simatic > Documentation or alternatively, you can order them from any Siemens sales center. All of the information in the manuals can be called up in STEP 7 from the online help. Have fun and good luck! SIEMENS AG STEP 7 Getting Started A5E00261403-01 iii Welcome to STEP 7... iv STEP 7 Getting Started A5E00261403-01 Contents 1 Introduction to STEP 7 1.1 What You Will Learn 1-1 1.2 Combining Hardware and Software 1-3 1.3 Basic Procedure Using STEP 7 1-4 1.4 Installing STEP 7 1-5 2 The SIMATIC Manager 2.1 Starting the SIMATIC Manager and Creating a Project 2-1 2.2 The Project Structure in the SIMATIC Manager and How to Call the Online Help 2-4 In Chapters 3 to 5, you create a simple program. 3 Programming with Symbols 3.1 Absolute Addresses 3-1 3.2 Symbolic Programming 3-2 4 Creating a Program in OB1 4.1 Opening the LAD/STL/FBD Program Window 4-1 4.2 Programming OB1 in Ladder Logic 4-4 4.3 Programming OB1 in Statement List 4-8 4.4 Programming OB1 in Function Block Diagram 4-11 5 Creating a Program with Function Blocks and Data Blocks 5.1 Creating and Opening Function Blocks (FB) 5-1 5.2 Programming FB1 in Ladder Logic 5-3 5.3 Programming FB1 in Statement List 5-7 5.4 Programming FB1 in Function Block Diagram 5-10 5.5 Generating Instance Data Blocks and Changing Actual Values 5-14 5.6 Programming a Block Call in Ladder Logic 5-16 5.7 Programming a Block Call in Statement List 5-19 5.8 Programming a Block Call in Function Block Diagram 5-21 STEP 7 Getting Started A5E00261403-01 v Contents In Chapters 6 and 7, you configure the hardware and test your program. 6 Configuring the Central Rack 6.1 Configuring Hardware 7 Downloading and Debugging the Program 7.1 Establishing an Online Connection 7-1 7.2 Downloading the Program to the Programmable Controller 7-3 7.3 Testing the Program with Program Status 7-6 7.4 Testing the Program with the Variable Table 7-8 7.5 Evaluating the Diagnostic Buffer 7-12 6-1 In Chapters 8 to 11, you can extend your knowledge to include new functions. 8 Programming a Function 8.1 Creating and Opening Functions (FC) 8-1 8.2 Programming Functions 8-3 8.3 Calling the Function in OB1 8-6 9 Programming a Shared Data Block 9.1 Creating and Opening Shared Data Blocks 10 Programming a Multiple Instance 9-1 10.1 Creating and Opening a Higher-Level Function Block 10-1 10.2 Programming FB10 10-3 10.3 Generating DB10 and Adapting the Actual Value 10-7 10.4 Calling FB10 in OB1 10-9 11 Configuring the Distributed I/O 11.1 Configuring the Distributed I/O with PROFIBUS DP 11-1 Appendix A A-1 Overview of the Sample Projects for the Getting Started Manual Index vi Index-1 STEP 7 Getting Started A5E00261403-01 1 Introduction to STEP 7 1.1 What You Will Learn Using practical exercises, we will show you how easy it is to program in Ladder Logic, Statement List, or Function Block Diagram with STEP 7. Detailed instructions in the individual chapters will show you step-by-step the many ways in which you can use STEP 7. Creating a Program with Binary Logic In Chapters 2 to 7, you will create a program with binary logic. Using the programmed logic operations, you will address the inputs and outputs of your CPU (if present). The programming examples in the Getting Started manual are based, among other things, on three fundamental binary logic operations. The first binary logic operation, which you will program later on, is the AND function. The AND function can be best illustrated in a circuit diagram using two keys. Key 1 Key 2 If both Key 1 and Key 2 are pressed, the bulb lights up. The second binary logic operation is the OR function. The OR function can also be represented in a circuit diagram. Key 3 Key 4 STEP 7 Getting Started A5E00261403-01 If either key 3 or key 4 is pressed, the bulb lights up. 1-1 Introduction to STEP 7 The third binary logic operation is the memory element. The SR function reacts within a circuit diagram to certain voltage states and passes these on accordingly. Memory Element Key S S R Key R If key S is pressed, the bulb lights up and remains lit until key R is pressed. 1-2 STEP 7 Getting Started A5E00261403-01 Introduction to STEP 7 1.2 Combining Hardware and Software Using the STEP 7 software, you can create your S7 program within a project. The S7 programmable controller consists of a power supply unit, a CPU, and input and output modules (I/O modules). The programmable logic controller (PLC) monitors and controls your machine with the S7 program. The I/O modules are addressed in the S7 program via the addresses. Programming device Programming device cable Transferring a program STEP 7 software Machine to be controlled CPU Power supply module STEP 7 Getting Started A5E00261403-01 Output module Input module 1-3 Introduction to STEP 7 1.3 Basic Procedure Using STEP 7 Before you create a project, you should know that STEP 7 projects can be created in different orders. Designing the solution to the automation task Creating a project (Chapter 2) Option 1 Option 2 Configuring the hardware (Chapter 6) Creating a program (Chapters 3 to 5) Creating a program (Chapters 3 to 5) Configuring the hardware (Chapter 6) Transferring the program to the CPU and debugging (Chapter 7) If you are creating comprehensive programs with many inputs and outputs, we recommend you configure the hardware first. The advantage of this is that STEP 7 displays the possible addresses in the Hardware Configuration Editor. If you choose the second option, you have to determine each address yourself, depending on your selected components and you cannot call these addresses via STEP 7. In the hardware configuration, not only can you define addresses, but you can also change the parameters and properties of modules. If you want to operate several CPUs, for example, you have to match up the MPI addresses of the CPUs. Since we are only using a small number of inputs and outputs in the Getting Started manual, we will skip the hardware configuration for now and start with the programming. 1-4 STEP 7 Getting Started A5E00261403-01