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timison
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樓主  發(fā)表于: 2009-10-05 10:58
9個(gè)儀表控制9個(gè)可控制硅，要求是9個(gè)儀表的PV SV RUN/STOP 都在觸摸屏中設定與控制 ，9個(gè)回路做PID功能 ，用PLC與儀表作通訊RS485的，成本在2萬(wàn)元左右�，F在我想直接用PLC采集熱電偶信號，PLC內部做PID運算，來(lái)控制可控硅，其成本會(huì )增加多少（國產(chǎn)PLC）

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