Problems triggering with NI-myDAQ, error: 200077

[jacquestkirk]

I am trying to do analog edge triggering on an analog output, but whenever I try to add a triggering block it throws error -200077, and tells me...

Property: Ref.TrigType
You Have Requested: Analog Edge
You Can Select: None

I'm pretty sure that my hardware supports analog triggering because I can trigger in the pre-compiled NI ELVISmx tools.

Any ideas?

[James_D]

Hello 🙂

Just to clarify, are you attempting to trigger the device based on an output from the device?

[gaving]

myDAQ does not support analog triggering in HW, so the ELVISmx software does it by using a continuously-acquiring task.  For some reason it didn't get ported to the express block.  Luckily someone did this for you.

http://decibel.ni.com/content/docs/DOC-5583

[jacquestkirk]

gaving: Thanks! I'll take a look at those VIs

James 😧 Actually I did want to trigger on an analog output but I thought it would be easier to generate a trigger output which is read by an analog input and trigger on that (since I thought the myDAQ had analog trigger capabilities). Since I need to implement custom triggering code anyway, do you know if the myDAQ has access to ao/StartTrigger?