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343012090
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樓主  發(fā)表于: 2016-05-20 13:56
PLC要和工控機和觸摸屏連接起來(lái)，有些PLC 的CPU只有一個(gè)RS232或者是485的連接口比如CJ2M，如果有它和觸摸屏連接，那和工控機就要用特殊通訊模塊了，比如EIP21
,但是我看在連接的時(shí)候都是中間通過(guò)一個(gè)陸由器，然后工控機的通信線(xiàn)連接到陸由器上。
如果這樣子，不要EIP21，直接用CPU上的RS485和陸由器連接，然后在由陸由器分配，連接到工控機以及觸摸屏，那就少買(mǎi)了一個(gè)EIP21，不知道這樣可以嗎？
leadchina111
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1樓  發(fā)表于: 2016-05-23 07:50
觸摸屏選個(gè)有以太網(wǎng)接口的跟CJ2M系列通訊，CJ2M串口用RS232與工控機通訊不就可以了嗎？

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