The composition and operational principle of an automatic frequency con version constant pressure water supplying system based on PLC and frequency convertor with serial communication are introduced.
介绍了一种基于PLC和变频器采用串行总线方式通讯的变频恒压供水系统的构成和工作原理。
2
The operational principle of the system and serial communication method are presented. The hardware structure and program block diagram are given.
介绍了系统工作原理、串行通信方法，给出了硬件电路结构及程序框图。
3
Introduce advantage of design and component and operational principle on communication and control System of TK200.