【作者】 朱敏；

【Author】 Min Zhu (School of Electrical and Automatization Engineering, Hefei University of Technology,Hefei, 230009)

【机构】 合肥工业大学电气与自动化工程学院；

【摘要】 本文详细介绍了基于PLC的智能变频恒压供水系统的结构和工作原理,并具体讨论了基于S7-200系列的PLC的控制系统的硬件设计和控制方法。系统采用PID控制算法,由PC机、S7-200PLC、EV1000变频器等构成智能变频控制系统, 取代水塔、水箱等设备,实现恒压供水的目的。整个系统设计结构简单、自动化程度高,并在实践中证明是可行的。更多还原

【Abstract】 This paper introduces in detail the configuration and working principle of the constant pressure water supplying intelligent system with frequency variation based on PLC. Concrete discussion is made on the hardware design and the control method of the control system based on the S7 - 200 PLC. For constant pressure water supplying, the intelligent system with frequency variation constituted by the PC ,S7 - 200 PLC and EV1000 transducer based on PID control arithmetic is instead of water supply equipment, such as water tower and water tank . The simplicity and high automation of the system design is verified in practice.更多还原