abstract
In modern social and economic activities, computer technology, automatic control technology and power electronics technology have developed rapidly, and elevators have become a symbol of urban material civilization. Especially in high-rise buildings, elevators are indispensable vertical transportation equipment. Today, with the rapid development of high-rise buildings, the elevator industry has entered a new development period. Elevator control technology has developed to frequency modulation, voltage regulation and speed regulation, and its logical control has changed from relay control to PLC control. Many of its functions can not be realized by traditional relay control system.
In view of the present situation of elevator industry in China, this design applies PLC to elevator logic control. Through reasonable selection and design, not only the reliability, maintainability and flexibility of the elevator are improved, but also the service life is prolonged, the development cycle of the elevator is shortened, the control level of the elevator is improved, the comfort of the elevator operation is improved, and the ideal control effect is achieved. Compared with the traditional elevator, the elevator designed in this paper has good running comfort, saving electricity in life, achieving good economic and social benefits and achieving the ideal purpose. Elevator control system has the functions of floor pointing, hall calling, floor selection and direction selection, manual and automatic, and has the characteristics of centralized control.
On the basis of introducing the basic structure of elevator, the working principle of elevator is deeply analyzed, the advantages and characteristics of PLC are expounded, the hardware design and software design of elevator are emphatically analyzed, and the realization scheme of elevator control system design based on PLC is studied and put forward. Finally, the research content of this paper is summarized and prospected.
PLC control of elevator frequency converter; frequency control
catalogue
Abstract 1
Abstract 2
Chapter 1 Introduction 1
1. 1 the purpose and significance of the topic 1
1.2 research status of elevators at home and abroad 2
1.2. 1 2 Domestic research status
1.2.2 Status quo of foreign research II
1.3 characteristics of elevator variable frequency speed control 3
1.4 research content of this design 3
Chapter 2 Overview of Elevator 5
2. 1 Introduction to the basic structure of elevator 5
2.2 elevator equipment
Elevator classification 6
2.2.2 Main components of the elevator 6
2.3 Introduction of elevator operation flow 7
2.3. 1 speed given curve 8
Chapter III Programmable Controller 10
3. The development history of1programmable controller 10
3.2 Definition and characteristics of programmable controller 1 1
3.2. Definition of1programmable controller 1 1
3.2.2 Features of PLC11
3.3 Basic structure and working principle of PLC 13
3.3. Basic structure of1programmable controller 13
3.3.2 working principle of programmable controller 14
The fourth chapter is the hardware design of elevator PLC control system 15.
4. 1 overall design idea 15
4.2 PLC control system design analysis 16
4.2. 1 system design content and steps 16
4.2.2 Design of Control Circuit 16
4.2.3 PLC control system design 18
4.2.4 Circuit design of I/O interface 19
4.2.5 Functions Implemented by Elevator Control System 20
4.3 Selection of Inverter 2 1
4.3. Introduction of1vs-616G5 Inverter 2 1
4.3.2 Inverter structure and parameter setting 22
4.3.3 Configuration and capacity selection of frequency converter 25
4.4 Selection of PLC 27
4.4. Selection of1PLC 27
4.4.2 Calculation of I/O Point 28
4.4.3 I/O allocation comparison table 30
4.5 Connection between rotary encoder and PLC 33
4.6 Variable Voltage Variable Frequency Speed Regulation (VVVF) 33
4.7 Calculation of Variable Frequency Drive System 35
4.8 Circuit design of portal crane 37
4.8. 1 Opening and closing procedures 37
The door drag system 38
Chapter V Software Design of Elevator PLC Control System 40
5. 1 opening and closing door control 40
5. 1. 1 door opening control 40
5. 1.2 door closing control 4 1
5.2 Registration, cancellation and display of internal commands and external call signals 42
5.2. 1 command signal processing 42
5.2.2 External Call Signal Processing 43
5.3 Floor calculation, speed change, leveling and parking 43
5.4 Floor Position Indication 44
5.5 Call bell control and fault alarm 46
5.6 Fire fighting operation 46
5.6. 1 Fire automatically returns to the next base station 46.
5.6.2 There are only 47 firemen.
Conclusion 48
Acknowledgement 49
Reference 50
Appendix 1 5 1
Appendix 2 52
Appendix 3 57
Appendix 4 67