pxie-6363 conflict and voltage problems

[Fredster687]

I have a new test station that uses two PXIe-6363 DAQs. Fixture 1&2 are connected to one daq and fixture 3 is connect to the second.

When I test the fixtures one at a time the voltage readings are correct. But when I run the fixtures in parallel fixtures 1&2 read high always. Fixture 3 is fine.

Sometimes fixture 1 or 2 will error with a resource failure. The error reported is

Error, DAQmx Start Task.vi:10 Task Name: _unnamedTask NI Platform Services: The specified resource is reserved. The operation could not be completed as specified. [Error Code: -50103, User-defined error code.]

I thought at first that it might be a grounding issue as the returned volatges were sometimes double the expect value. But this does not appear to be the case.

I have made copies of the measurement vi using different names for each fixture, but no difference.

LED_Colour_Test.Channels.UUT1.Volt1    """PXI1Slot2/ai3"""
LED_Colour_Test.Channels.UUT1.Volt2    """PXI1Slot2/ai4"""
LED_Colour_Test.Channels.UUT1.Volt3    """PXI1Slot2/ai5"""
LED_Colour_Test.Channels.UUT2.Volt1    """PXI1Slot2/ai19"""
LED_Colour_Test.Channels.UUT2.Volt2    """PXI1Slot2/ai20"""
LED_Colour_Test.Channels.UUT2.Volt3    """PXI1Slot2/ai21"""
LED_Colour_Test.Channels.UUT3.Volt1    """PXI1Slot3/ai3"""
LED_Colour_Test.Channels.UUT3.Volt2    """PXI1Slot3/ai4"""
LED_Colour_Test.Channels.UUT3.Volt3    """PXI1Slot3/ai5"""

Any suggestions how to resolve this.

[David. B]

Hello,

There are a number of reasons as to why this error may occur and, as a result, there are a number of possible fixes. I have found a Knowledge Based Article that talks about many of these, I would imagine that Case 6 is the most likely to be appropriate for you but I would still consider all of the possible explanations.

I hope that this helps you and wish you all the best with your application.

Kind Regards

[Fredster687]

David,

Thanks for the quick response.

I think the article will help me fix the problem.

I will also try the suggestions for case 7 and use an autocleanup.