西門子PLC300。上位(vb)從PLC讀上來的數據是倒的?或者說,PLC存儲器高低位和別人的是反著的?見下。謝謝
這是上位要往PLC寫數據之前的操作,需要把數據倒過來一下。
CopyMemory pReadBuffer1(0), a, 4
pReadBuffer(0) = pReadBuffer1(3)
pReadBuffer(1) = pReadBuffer1(2)
pReadBuffer(2) = pReadBuffer1(1)
pReadBuffer(3) = pReadBuffer1(0)
MyHex = field_write_ex6(100, 2, 20, 12, 12, pReadBuffer(0))
求介紹西門子存儲器 是倒著的 詳細學習資料(網址也可喲)謝謝!
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