Use an external reference to AOchannel

Hello

Using a device of 6259, I try to generate two analog outputs in a task. However, one of the outputs analog must use an external reference (using APFI1 for example).

The problem is that I can't find a way to indicate the external reference to a single channel.

Even though the documentation says that the AOChannelCollection was a member of the public "Item", this is not the case.

According to the manual of the 6259, it must be possible to assign the internal and external references per channel: "you can use one of the OD <0..3>signals as the AO reference for a different signal of AO. However, you need to externally connect this channel to APFI 0 or 1 APFI. ' - Manual usage of the series of the M, 5-2.

Thank you.

Hey,.

I tested it with the following code by using two channels, each with a different external reference:

myTask.AOChannels [0]. DacReferenceSource =
AODacReferenceSource.External;
myTask.AOChannels [0]. DacReferenceExternalSource
= "/ Dev3/APFI0";
myTask.AOChannels [0]. DacReferenceValue =
10.0;
myTask.AOChannels [1]. DacReferenceSource =
AODacReferenceSource.External;
myTask.AOChannels [1]. DacReferenceExternalSource
= "/ Dev3/APFI1";
myTask.AOChannels [1]. DacReferenceValue = 5.0;

Hope this helps,

Christian

Tags: NI Software

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