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樓主  發(fā)表于: 2008-06-19 02:04
小弟今天要將一個(gè)流量計的RS485信號通過(guò)S7-200采集然后再傳到300.。
在RS485信號到S7-200的通訊是個(gè)盲區,來(lái)此請教各位老師,如何編寫(xiě)程序
王睿
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1樓  發(fā)表于: 2008-06-19 06:36
還沒(méi)學(xué)會(huì )呢 不好意思
cvlsam
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2樓  發(fā)表于: 2008-06-19 08:51
基于物理結構的RS485協(xié)議非常的多,您使用何種協(xié)議?

如果是Modbus,那么論壇上已經(jīng)有相關(guān)例程,如果要簡(jiǎn)單通訊,可以購買(mǎi)慶同貿易(021-62521122)的Modbus界面轉換卡。

以上 !

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