基于PLC的自动门控制系统设计

Control system design of automatic door based on PLC

为增强自动门运行的可靠性,提出了一种以S7-200可编程序控制器(PLC)为核心的自动门控制系统。分析了该控制系统的工作原理,描述了系统的硬件组成,介绍了人体感应探测、自动门运行位置检测、门运行障碍检测等控制电路的工作过程,对PLC的选型及I/O点的确定进行了说明。结合PLC的运行特点,对控制系统的工作流程作了合理的优化。在此基础上,采用结构化的编程方法,给出了主程序模块、开门子程序模块、关门子程序模块的程序流程图。系统已通过硬件和软件调试,在实际中获得了应用。应用结果表明,整个系统功能完善,性能可靠。

Aiming at enhancing the reliability of the automatic door operation,S7-200 programmable logic controller（PLC） was used as the core of the automatic door system.The principle of control system was analyzed with description of the control system hardware.It was introduced that the working process of control circuits about human body detection sensor and automatic door position detection and obstacle detection and so on.it was introduced how to choose a PLC type,to really settle the I/O orders.Combining the operation characteristics of programmable controller,a reasonable optimization was made for the work flow of the system.On this basis,using structured programming method,the program flow charts of main program module and opening door subroutine module and closing door subroutine module were developed.The debugging of the control system was developed and the control system has been adopted.The practical application shows that the control system is good and reliable.