How can digital pins be used as input and output at same time?

[stilly32]

Hi,
You'll want to set your Elvis in Bypass Mode and use DAQmx&nbsp;in order to read and write on the same lines (DI). Check out the <a href="http://digital.ni.com/manuals.nsf/websearch/11E6BA4103D9ADD086257103005C97E0" target="_blank">Elvis User Manual</a>, page 79. <a href="http://forums.ni.com/ni/board/message?board.id=10&amp;message.id=318&amp;requireLogin=False" target="_blank">This post</a>&nbsp;also has some good info.
Hope this helps, please post back if you have additional questions.
Cheers,
Andrew S
National Instruments

[stilly32]

Hi,
To read and write on the same lines, the best place to start would be the Write Dig Port shipping example. You would then just need to add a DAQmx Read.vi. Something like this:
<img src="Loading Image...">
Also, if you just need to read from lines 0-3 and write from 4-7, you'll just want to use the "write dig chan" and "read dig chan" examples and specify the correct channels.
Hope this helps,
Andrew S
&nbsp;
&nbsp;Message Edited by stilly32 on 03-05-2007 04:53 PM


write_read_dig_port.JPG:
http://forums.ni.com/attachments/ni/70/6467/1/write_read_dig_port.JPG