This book is the designated textbook for secondary vocational students majoring in mechanical manufacturing and automation in Tianjin. Focusing on the theme of machine tool electrical appliances and control, it describes commonly used transmission motors and control motors, commonly used low-voltage electrical appliances and relay-contactor control circuits, programmable controller principles and their application technology, PLC control system design methods, and typical electromechanical control system design examples. Preface Chapter 1 Motor 1 1.1 Three-phase asynchronous motor 1 1.2 Single-phase asynchronous motor 20 1.3 DC motor 22 1.4 Permanent magnet synchronous motor and brushless DC motor 26 1.5 Motor selection 28 1.6 Micro motor 31 [Chapter summary] 36 Questions and exercises 37 Chapter 2 Relay contactor control 40 2.1 Common low-voltage control devices 40 2.2 Relay contactor control circuit 49 [Chapter summary] 53 Questions and exercises 54 Chapter 3 Introduction to Programmable Controller 55 3.1 History and definition of PLC 55 3.2 Structure and composition of PLC 56 3.3 Functions and classification of PLC 59 3.4 Characteristics and working principle of PLC 61 3.5 Development trend of PLC 63 [Chapter summary] 64 Questions and exercises 64 Chapter 4 S7 200 PLC structure and programming basis 65 4.1 S7 200 4.2 S7 200 PLC CPU Module 65 4.3 S7 200 PLC Digital I/O Expansion Module 68 4.4 S7 200 PLC Analog I/O Expansion Module 68 4.5 S7 200 PLC Communication Expansion Module 68 4.6 S7 200 PLC Control System Configuration Principle 69 4.7 PLC Programming Language 69 4.8 S7 200 PLC Program Structure 70 4.9 S7 200 PLC Data Type 71 4.10 S7 200 PLC Data Storage Area 72 4.11 S7 200 PLC Addressing Mode 74 [Chapter Summary] 76 Questions and Exercises 76 Chapter 5 S7 200 PLC Instruction System 78 5.1 Bit Logic Instructions 78 5.2 Timer and Counter Instructions 85 5.3 Data Processing Instructions 89 【Chapter Summary】96 Questions and Exercises 96 Chapter 6 Application of PLC Programming Software STEP 7 Micro/WIN 99 6.1 Installation Method and Main Functions of Programming Software STEP 7 Micro/WIN 99 6.2 Programming Rules and Methods of S7 200 PLC Ladder Diagram 107 6.3 Main Steps for Program Development and Debugging Using STEP 7 Micro/WIN 114 【Chapter Summary】125 Questions and Exercises 126 Chapter 7 Control System Design Method of S7 200 PLC 127 7.1 Connection Methods of Common Input and Output Components and PLCs in Electrical Control Systems 127 7.2 Principles of PLC Selection 131 7.3 Examples of Common PLC Control Programs 133 7.4 Typical Control System Design Methods 145 【Chapter Summary】157 Questions and Exercises 157 Chapter 8 PLC Application Design Examples of Typical Electromechanical Control Systems 159 8.1 Delayed Forward and Reverse Control of Material Transport Carriage 159 8.2 Star-delta decompression starting control of motor 162 8.3 Repeatable sequential starting and reverse stop control of belt conveyor 163 8.4 Automatic loading and unloading control of material transport cart 167 8.5 Automatic control program design of washing machine 168 8.6 Stepper motor operation control 170 8.7 PLC control of Z3050 radial drilling machine 174 8.8 Multi-stage speed operation of motor controlled by inverter 178 8.9 PLC control of T68 boring machine 182 8.10 PLC control of X62W universal milling machine 187 8.11 PLC control system of B2021A gantry planer 191 8.12 Manipulator control system for handling products 209 Appendix 217 Appendix AS7 200 PLC special register (SM) value and function 217 Appendix BS7 200 PLC instruction system table 224 Appendix CS7 200 PLC error code 229 References 232
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