Real-Time Measurement and Control
digital input not inverted
I had a digital input c-series module 9425. My inputs are "active-low"; ie a high voltage shld be interpreted as low.
I inverted the properties dialog and deployed the IO variables. But it don't seem to be workin.
Anyone has any idea? II'm using 2010 SP1.
Many thanks!
Hi j3r3mi,
What sort of output are you getting that makes you think that it isn't working? Do the values appear to be unchanged?
Just for certainty, go to the Distributed Systems Manager, found in the National Instruments folder in the Start > All Programs subdirectory and find your connected device. Try polling what values particular lines of your sinking digital input module return; apply a digital high (5V TTL) or low (0V) and see whether or not the expected values are displayed when you allow the lines to be inverted. This will show whether of not your module is correctly returning the expected data.
If this works through the DSM, try performing the same tests on your VI. This should return the same results, if not there may be a problem with the channel configuration through LabVIEW.
