The subject is using CPLD control conventional electric intermediate frequency heating plant, and, the system must have a RS232 interface to transmit the code of machine malfunction .This is a improvement issues of Shen Zhen heattop science & technology CO,.LTD.
Using CPLD control conventional electric intermediate frequency heating plant. It is main to program to control the leading connecter、the power connect、the complement electromagnetism、the signals of break down、the function of reset. To make the equipment start succeed.
Keywords: PLC;CPLD ;VHDL;RS232