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楠竹888
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樓主  發(fā)表于: 2024-10-31 21:01

十年前的系統了,用的是西門(mén)子PLC S7200, 和二個(gè)觸模屏(二地控制),一個(gè)是TP177B,一個(gè)是MP277 。最近TP177B屏壞了,就換了一個(gè)700IE V3上去。700IEV3安裝在電箱上,通電后這個(gè)能正常使用,但是MP277屏就黑屏,700IEV3不通電,MP277就能正常使用。簡(jiǎn)單說(shuō)就是二個(gè)不能同時(shí)通電使用。

剛開(kāi)始同時(shí)使用了幾天就不行了,后去拆MP277的時(shí)候發(fā)現把MP277的地線(xiàn)拆了就可以正常使用,但用了幾天又黑屏了。再接上地線(xiàn)也不行了。MP277的外殼碰到地線(xiàn)時(shí),地線(xiàn)與外殼好象有電壓差,會(huì )有火星。

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