Abstract : This design has introduced performance and characteristic of the FX2N PLC machine, and a kind of low cost , high accuracy , microminiaturization , digital display taking it as the core one agitates the control system. Can programme controller (Programmable controller ) abbreviate as PLC is one rapidly , it uses to be extremely extensive industry control device extremely in recent years. It is a kind of electronic system using the figure designed for the industrial environment to operate specially, it adopts the memory that can programme the procedure , used for storing user's order, figure or introductions of simulation /output not finishing order not logic not confirmed, timing , counting, operation and some functions confirmed control all kinds of machinery or production process.
Because the performance of PLC is superior , have concurrently function of computer complete , strong flexibility have , fine continuing electric contactor controlled and easily understood commonability have, maintain the double exte advantage such as being convenient, form the electron taking microcomputer as the core and control the equipment. there is extensive application in modern industrial production and actual life to become the basic automatically controlled device PLC in the automated system, because of the programmable controller (PLC), control flexible help , Have originally designed and analysed FX series PL and performance characteristics of CM68HC11 one-chip computer's serial communication interface, have introduced the communication protocol of FX series PLC and and one-chip computer news report design method, this technology has already been succeeded in applying to agitate the control system, practical application indicates this design is of simple structure, with low costs, dependability is high, have very good value to popularize.
Keyword: Agitate the control system Can programme the controller One-chip computer Communication protocol
目 录
摘 要 Ⅰ
Abstract Ⅱ
第1章 绪 论 1
1.1本课题的目的和意义 1
1.2 PLC的发展及前景展望 1
1.2.1PLC的历史 1
1.2.2PLC的应用领域 2
1.2.3PLC的国内外发展状况 2
1.2.4PLC的发展趋势 3
1.3 系统的工艺要求 4
第2章 系统的控制方案 7
2.1 方案的选择 7
2.2 程序控制器的选择（PLC的选型） 8
2.3 方案结构图 9
2.4 系统工作原理 9
第3章 系统的硬件设计 10
3.1 硬件的构成 10
3.2 通信协议 10
3.3 M68HC11单片机通信编程 13
3.3.1 通信方式设置 13
3.3.2 M68HC11单片机通信流程 13
3.4 元件的选择 14
3.4.1 电磁式交流接触器 15
3.4.2 热继电器 16
3.4.3 熔断器 16
3.4.4 塑料刀开关 17
3.4.5 控制按钮 17
3.4.6 光电传感器 17
3.4.7 电源 19
第4章 系统的软件设计 20
4.1 PLC的时间设定与控制 20
4.2 显示电路 22
4.3 抗干扰可靠性措施 23
4.4 故障检测与报警电路 26
总结 27
参考文献 28
致谢 29
附录 30
