XNET: How many sessions?

I work with XNET for the first time, and I have a pretty general question. In my setup, I'll be reading and writing several signals. The outputs go to cyclical frames, and the entries come from cyclical images. However, I will be reading and writing at random times under software control. Indeed, different signals will be written and read rates and different times.

For simplicity, we will consider only the output of my computer. Suppose that I update a signal rate X 'A' and a 'B' signal at a rate of 0.25 X. Maybe it's because the signals are integrated into the same frame, or (for different signals, say that 'A' and 'C'), they can be in separate frames. Is it worth i) have two separate sessions, one for each signal? Or (ii) should I be two signals in a single session? Or (iii) is it important?

Thank you

Jason

I would recommend that you have a single session, which is a single unique Point, with all signals in it.  It would then look like this.

http://zone.NI.com/reference/en-XX/help/372841L-01/nixnet/modesignaloutputsinglepoint/

Here, you can write your signals at any time, and no matter whether the signals are in the same frame or not, the API will plan the writing of them to be at the speed specified by the database.  The only downside is on each entry, you have to write all the signals, but which is not so bad because you can keep in a shift register, what the previous writing was and then replace the values with signals that change and maintain the previous value for those who do not.  Probably, you should also read the default values of all the signals on the first entry.

Tags: NI Products

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    Isn't beautiful! I just wanted to share this.

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