Error -200077 with a PCI-6251 card and SC-2345 signal conditioner block

[Lammers]

I'm getting this error message when I run the example v.i. "Acq&Graph Voltage-Int Clk-Dig Start.vi":

Error -200077 occurred at Property Node DAQmx Channel (arg 6) in DAQmx Create Channel (AI-Voltage-Custom with Excitation).vi

I'm using an SC-2345 signal conditioning block with a PCI-6251 card.  There are six wheatstone bridges connected to three SCC-SG04 blocks.  Under the "channel parameters" I can see the appropriate device (SCC1Mod1/ai0, for example).  But I always get the same error message.

Any ideas?

[Sarah_Coleman_NIUK]

Hi there,

you get this error when you try to configure a parameter that isn't supported for the device you're using. Could you post a copy of the code you're using so I can look at it?

[Jarrod_B.]

Hello Lammers,

There are a number of different things that can go wrong when configuring the DAQmx Create Channel VI for AI Custom Voltage with Excitation.  You should take a look at the example Acq Wheatstone Bridge Samples (with Calibration).vi to see how to properly configure this type of acquisition.  The following are some things to keep in mind:

• If you do not specify a value for the excitation volage, it defaults to 0, which is an unsupported value, and you will get error -200077. 
  
• If your max and mix input limits are out of range (if using a custom scale, you must specify the limits in terms of the scaled units...if no custom scale the signal range is +/-100mV) then you will get error -200077

The example I mentioned should clear things up.  Let us know if you have any problems after setting up your VI to follow this example.

Best regards,

[Lammers]

Thanks for your replies.  I ended up solving the problem my using the "DAQ assistant" sub-vi.  This solved the problem of connecting LabVIEW to my instruments, but now I've got another problem (posted in a new thread) with extracting [i]time[/i] from the data wire, which is apparently "dynamic."