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cdxjfj
問(wèn)題總是很多
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樓主  發(fā)表于: 2023-11-20 11:11
為什么臺達PLC（DVP系列）可以通過(guò)MODBUS 通信讀寫(xiě)從站的M點(diǎn)（用的是01功能碼）？而西門(mén)子卻貌似不能？有哪位大神能解答一下？
wsxebjz
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1樓  發(fā)表于: 2023-11-28 22:48
自己用個(gè)威綸通觸摸屏做一個(gè)位狀態(tài)關(guān)聯(lián)西門(mén)子plc的m點(diǎn)，然后用串口監聽(tīng)報文看看
wsxebjz
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2樓  發(fā)表于: 2023-12-07 17:42
好像讀寫(xiě)y/q輸出，要用ff 00/00 00來(lái)代表1或0，功能碼是5/1，寫(xiě)/讀。

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