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chuchu_chuchu
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how to read back the output state for digital output or anlog output ?

I use NI-pci 6221(68PIN) Accquistion card to do measurmet,after i do digital output ,or anlog output ,I find that the output will be maitained by the card.even after i exit my accquistion program.But if i reset the card ,the ouptut also will be reset.

Now if i don't reset the card ,how can i read back the output state,?