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kayling888
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樓主  發(fā)表于: 2009-05-06 20:03
     昨天看到一臺設備，感到PLC的結構新鮮，告知大家，有沒(méi)有懂的起的？
  用S7-200做主從通訊，主機有兩個(gè)通信口，從機只有一個(gè)通信口，問(wèn)題是從機在下傳了程序后，僅有的這個(gè)通訊口已經(jīng)定義了，不能再與PC/PPI通訊地，萬(wàn)一程序要調試怎么辦，以前我自己做，從機都選兩個(gè)通訊口的，一個(gè)做與主機通訊的，一個(gè)做調試程序用的，今天沒(méi)想到還有另一種用法，有點(diǎn)高啊，慚愧不已，但自已的道行不高又不能理解這種接法是怎么調試的，請各位大哥們指教��！1
dell
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1樓  發(fā)表于: 2009-05-07 08:53
就是啊,你仔細想一下就明白是怎么回事了啊!

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