Second DAQ assistant in the power control system does not

Hi all

I need your help on this issue. I'm currently programming a VI for one command power supply for pool boiling experiments. The organizational structure of the VI program is attached.

I use two assistants DAQ for steady-state acquisition and temperature unstable state data respectively. The first assistant DAQ (samples to read 5, 5 Hz rate) for the acquisition of works unstable state data well (see the attached image file first DAQ Assistant for acquisition of temperature unstable state). The second assistant DAQ (samples to read 12 k, 200 rate) for stationary data acquisition does not work (please see attachment image Second Assistant DAQ of steady-state temperature acquisition), showing only a series of data files size of 1 KB with no data on the inside. And indicators for steady-state data also revealed nothing.

After a similar Q & A search in the forum, I tried to distribute different channels for 1 and DAQ assistant 2. However, the situation was almost the same.

The material I used are chassis SCXI 1000 and SCXI 1303 Council to acquire thermal couple temperature data. Food was AMREL SPS200-50-K025. LabVIEW software is the 2014 version.

I had just started to learn LabVIEW for only a month, and I know that the VI is a little messy. Hope you guys can also give me some advice on how to improve this VI.

Have you looked at the error on the second daq assistant? You will see that a reserved resource error because you cannot use two different assistants. You do not mention the real DAQ hardware but there a clock unique convert. You can use only one assistant with a unique sampling frequency.

Tags: NI Software

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