1、 摘 要 可编程控制器是一种应用很广泛的自动控制装置， 它将传统的继电器控制技 术、计算机技术和通讯技术融为一体，具有控制能力强、操作灵活方便、可靠性 高、适宜长期连续工作的特点，非常适合温度控制的要求。 在工业领域，随着自动化程度的迅速提高，用户对控制系统的过程监控要 求越来越高，人机界面的出现正好满足了用户这一需求。人机界面可以对控制系 统进行全面监控，包括过程监测、报警提示、数据记录等功能，从而使控制系统 变得操作人性化、过程可视化，在自动控制领域的作用日益显著。 本文主要介绍了基于西门子公司S7-200系列的可编程控制器和亚控公司的 组态软件组态王的炉温控制系统的设计方案。编程时调用了
2、编程软件STEP 7 -Micro WIN中自带的PID控制模块，使得程序更为简洁，运行速度更为理想。利 用组态软件组态王设计人机界面，实现控制系统的实时监控、数据的实时采样与 处理。实验证明，此系统具有快、准、稳等优点，在工业温度控制领域能够广泛 应用。 关键词：温度控制 可编程控制器 人机界面 组态王 ABSTRACT In modern cities, elevator is a closest companion to DHHGY customers as well as an indispensable travel tool, which is equally important
3、as water, electricity, gas and other necessities of life. With the continuous improvement of peoples living standard, increasingly high expectations of elevator are widespread concerned, especially the reliability, ride comfort, energy conservation and operating speed. To improve the operation effic
4、iency and service quality, it needs in-depth studies to improve elevator controller and speed governing approaches. Due to low reliability, bulky size and slow response, traditional relays in elevator control systems have basically been eliminated, and replaced by programmable logic controllers. Wit
5、h the development of power electronics technology and microelectronic technology, it is an indisputable fact that AC speed governing has been replaced by DC drive. In AC Drive Speed Control System mode, AC VVVF with advantages of easy speed-governing and energy-saving compares favourably with DC VVV
6、F， so it is widely used in various fields and becomes the mainstream of motor speed governing. In this paper, frequency control of motor speed based on programmable logic controller is applied to the elevator control system, which is got deep reaches Principles of programmable controller and frequency control technology are presented. According to six-story elevator control requirements, implementation of VVVF elevator control system is proposed based on S7-200 PLC and common
