西門(mén)子PLC300。上位(vb)從PLC讀上來(lái)的數據是倒的?或者說(shuō),PLC存儲器高低位和別人的是反著(zhù)的?見(jiàn)下。謝謝
這是上位要往PLC寫(xiě)數據之前的操作,需要把數據倒過(guò)來(lái)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(mén)子存儲器 是倒著(zhù)的 詳細學(xué)習資料(網(wǎng)址也可喲)謝謝!
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