说明：  摘要 随着自动控制领域在工业中的广泛应用，对自动控制的要求也越来越高，主要在于可操作性，稳定性，简易性。而可编程逻辑器PLC就很好的解决了这个问题，体积小，功能强大，安装方便。而现在市场上应用的最广的与PLC紧密结合的上位机操作软件就是IFIX软件，为了更好的了解和应用IFIX软件，本毕业设计通过在IFIX软件环境中实现交通灯的模拟，具有一定代表性，易于达到该目的。 本设计主要目的在于熟悉IFIX软件及应用，把PLC编程设计技术和IFIX软件功能紧密结合在一起，加强了应用能力。通过对交通的的模拟实验，进一步加深了两者之间的结合，加强了工程应用能力。 关键字：IFIX；可编程逻辑控制器；PLC；交通灯模拟
(Abstract As in the field of automatic control in a wide range of industrial applications, automatic control of the increasingly high demand, mainly in operation, stability, and recommendations. And programmable logic PLC for the good of this issue resolved, small size, powerful, easy installation. And now on the market the most extensive application of the PLC and in close connection with the PC operating software is IFIX software, in order to better understanding and application of IFIX software, the graduation passed in IFIX software design environment to achieve the simulation of traffic lights, the representative of a certain , Easy to achieve that purpose. The main purpose is to design IFIX familiar with the software and applications, the PLC programming software technology and IFIX closely together to strengthen the ability. Through the traffic of the simulation experiments, to further deepen the integration between the two, to strengthen the capacity of engineering applica)