External convert samples don't work for PCI-6111

[DaveBern]

I'm trying to use an external convert signal for a single channel acquire on a PCI-6111. I'm using VB. The supplied example (DAQSingleBufExtConv_Eseries) doesn't work. I get error # -10003 at the DAQ_Config call. I have tried all sorts of combinations of DAQ_Config and Select_Signal, but have no success.
Why is this so? I'm using NI-DAQ 6.9.1.

[Spencer S.]

Dave,

The Traditional NI-DAQ Function Reference Help for the DAQ_Config function contains the following comment:

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Note: (61XX devices only) The only allowed values for extConv are 0 and 2. The conversions occur simultaneously for all channels and are controlled by the scan interval.
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The Traditional NI-DAQ Function Reference Help is available in the following location:

Start >> Programs >> National Instruments >> NI-DAQ >> Traditional NI-DAQ Function Reference Help

So, you will want to assign the extConv parameter a value of 2 and use the Select_Signal function to route the signal accordingly.

Good luck with your application.


Spencer S.

[DaveBern]

Thanks. It works fine now. (Perhaps I should read the notes more carefully in future!!!)

Dave.