所有PLC錯(cuò)有問(wèn)題還是只一個(gè)PLC有問(wèn)題[?試著與多站系統(tǒng)中其它PLC連接。如果與任何-一個(gè)都不能連接，檢查常見(jiàn)的問(wèn)題如電纜本身缺陷。如果能與其它PLC連接，只是與某個(gè)PLC不能連接。采用直接連接方式如下一-段落所述。同樣，如果只是多站鏈路中最后一個(gè)PLC出現(xiàn)問(wèn)題，可能是最后一部分的電纜有問(wèn)題?；蛘?，你能與某一點(diǎn)上游的所有PLC連接，但與該點(diǎn)下游的所有PLC都不能連接，那么強(qiáng)烈建議檢查是否這部分電纜有問(wèn)題。

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