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×Ô¶¯»¯×¨ÒµÂÛÎÄ·¶ÎÄ Ä¿ ¼ µÚÒ»Õ ÒýÑÔ 1 1.1 ¿ÎÌâ±³¾° 1 1.2 ¿ÎÌâ¸ÅÊö 1 1.3 ¿ÎÌâµÄÒâÒå 2 µÚ¶þÕ ʹÓù¤¾ß½éÉÜ 3 2.1 EDA±à³Ì¹¤¾ßµÄ½éÉÜ 3 2.1.1 EDA¼¼ÊõµÄ·¢Õ¹ 3 2.1.2 Ó²¼þÃèÊöÓïÑÔVHDL½éÉÜ 4 2.2 PLC¹¤¾ßµÄ½éÉÜ 5 2.2.1 S7-200ϵÁÐPLCÓ²¼þ½éÉÜ 5 2.2.2 S7-200ϵÁÐPLCÈí¼þ¹¦ÄܽéÉÜ 7 µÚÈýÕ ·½°¸µÄÑ¡Ôñ 14 3.1 Ñ¡ÔñCPLDÉè¼ÆµÄÓÅÔ½ÐÔ 14 3.2 ·½°¸µÄ±È½Ï 15 µÚËÄÕ ϵͳ·ÖÎö 17 4.1 ϵͳµÄ¹¦ÄÜ 17 4.2 PLC³ÌÐò½â¶Á 17 4.3 Á÷³Ìͼ 20 µÚÎåÕ ³ÌÐòÉè¼Æ 24 5.1 ¸÷¹¦ÄÜÄ£¿éµÄ³ÌÐòÉè¼Æ 24 5.2 RS232½Ó¿ÚͨѶ 31 µÚÁùÕ Ӳ¼þµ÷ÊÔ 35 6.1 ÖÐƵµçÔ´µÄ¹¤×÷Ô­Àí 35 6.2 ÍâΧµç·µÄ¼ì²é 35 ½á ÂÛ 36 ÖÂл 37 ²Î¿¼ÎÄÏ× 38 ¸½Â¼Ò» 39 Õª Òª ±¾¿ÎÌâÊÇÓÃCPLDÀ´ÊµÏֶԿɿعèÖÐƵµçÔ´µÄÂß¼­¿ØÖÆ£¬²¢ÇÒÓÐRS232ͨѶ½Ó¿Ú£¬ÓÃÀ´´«Ë͹ÊÕÏ´úÂë¡£ÕâÊÇÉîÛÚºãÍؿƼ¼ÓÐÏÞ¹«Ë¾µÄ¸Ä½øÐÔ¿ÎÌâ¡£ ÓÃCPLDʵÏÖ¶ÔÖÐƵµçÔ´µÄ¿ØÖÆÖ÷ÒªÊÇÖ¸±à³ÌʵÏÖ¶ÔÖ÷½Ó´¥Æ÷µÄ¿ØÖÆ¡¢¶Ô¹¦ÂʽÓͨµÄ¿ØÖÆ¡¢Ô¤³ä´Å/Ô¤³äµç½Ó´¥Æ÷µÄ¿ØÖÆ¡¢¸÷¸ö¹ÊÕÏÐźŵĿØÖÆÒÔ¼°¸´Î»¹¦ÄܵȵĿØÖÆ£¬ÒÔʹÖÐƵµçÔ´Äܹ»ÆðÕñ³É¹¦¡£ ¹Ø¼ü´Ê£ºPLC£»CPLD£»VHDL£»RS232 Abstract 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
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