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wucunguan
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樓主  發(fā)表于: 2010-07-16 19:02
各位好
請教個(gè)問(wèn)題
用S7 300與一個(gè)設備通過(guò)profibusl連。那個(gè)設備需要發(fā)指令過(guò)去,比如說(shuō)發(fā)到字節5和6,也就是相對應于PLC是輸出點(diǎn),那這個(gè)我嘗試用簡(jiǎn)單的move指令,比如說(shuō)move 2和0到PQB105和PQB106,這個(gè)不管了,不是重點(diǎn)。
重點(diǎn)是,在第2個(gè)字節處還得進(jìn)行自加1操作,也就是發(fā)一次指令,該字節里的數值必需加1,那就相對于PLC輸出點(diǎn),那要怎么做呢?用加法(ADD)是沒(méi)辦法讓1和PQB102相加。這個(gè)輸出點(diǎn)的加1要怎么弄?
本人PLC菜鳥(niǎo)加新手,問(wèn)題若過(guò)于愚蠢,請嘴下留情。更希望看到各位的精辟見(jiàn)解。
非常謝謝
beiye1234
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1樓  發(fā)表于: 2010-07-17 23:30
movb 傳送應該可以吧。有字節自加1指令。

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