SCXI 1531 IEPE in LabVIEW

[SteveLundgren]

I have a question regarding turning on the SCXI-1532 internal IEPE source programmatically in LabVIEW 8.0. 

Background:  I am using a SCXI-1000 chassis with a SCXI-1600 DAQ, SCXI-1531 and a SCXI-1120 card to collect signals.  When testing out accelerometer signals under NI-DAQmx Devices in Max 4.0, I can hear the relays closing on the 1531 module to provide the constant current source.   

Problem:  When trying to switch the internal IEPE source on programmatically in LabVIEW, I do not hear the relays closing.  I have tried cycling the power on the chassis to reset the module and reset the chassis programmatically and nothing seems to work.

I have attached an example of the code in LabVIEW that does not work. What am I missing?  Any help would be greatly appreciated.

Thank you,

Steve

[Paul_C.]

Hi Steve,

I believe you will need a DAQmx Start Task to commit the task and for the internal IEPE source to turn on.  Just add this after you set the task types.

Regards,
Paul C