Pulling errors from PXIe-6535?

[CurtisHx]

The "Active" LED on my PXIe-6535 keeps strobing red, which I assume means something is going wrong.

However, I cannot find any information on why it might be strobing red, or how to get the root cause.

How can I determine what is causing the active LED on the PXIe-6535 to go red?

[sunaenae]

Hi CurtisHx,

Are you receiving any errors  or programming issues when running your program? A red active LED on your device can indicate a FIFO overflow or underflow, which may be your issue here.

[CurtisHx]

Crud.  I just realised it's the "Access" LED that's been strobing red, not the "Active" LED.

And no programming issues or anything to indicate something is going wrong.

[sunaenae]

Hi CurtisHX,

The red access LED is usually turned on when you are self-testing the device or if the self-test produced a failure. Are either of those situations applicable to your situation?

So nothing is actually giving you an error or producing incorrect results?

[CurtisHx]

I'm not explicitly triggering any self-testing.  The card is working as expected.  The red access LED will go red radomly while my test fixture is running.  

[sunaenae]

Hi CurtisHx,

Are you experiencing any errors or unexpected results? If not, it might just be expected behavior. Sometimes the LED turns amber (which unfortunately, looks a lot like red) when the device is being acessed or when data is being streamed to/from it.

[CurtisHx]

No errors.  No unexpected results.  My code runs without throwing any DAQmx exceptions.

The LEDs are typically yellow / amber, and the Access is clearly going red randomly.

I take it from your inquiries that there are not any diagnostics on the 6535 to determine the root cause?

[BvanG]

Hi CurtisHx,

Since it doesn't sound like this is impacting your data or throwing errors, it may just be expected. Since you're not running into errors, there's not much we can diagnose. If this becomes a larger issue, please call in to Support and create a service request.

Brittany V.

Applications Engineer

[Kyle_A.]

The Access LED strobes when the Host accesses the hardware. If you are running your program, this is probably due to you communicating with the hardware normally. There should be no concern about improper operation based on this scenario. If there is a more serious error in the future, you'll be warned by the NI-HSDIODAQmx driver throwing an error with a message. 

[CurtisHx]

Kyle,

The PXIe-6535 uses the DAQmx library.  I've downloaded and installed the HSDIO package, and it does not detect the 6535