Multiple channel AI measurement in the same module with synchronised AO
I am using NI -9172 for measurment. I am trying to mesure two AI voltage signals on the same module (NI9215).A sinosoidal analog input voltage is generated using NI 9263. The AI and AO are synchronised using Ai start trigger signal from NI 9263( AO). While I can measure an AI signal using the same module, it does not show any measurement signal when I try to modify the VI program for multiple channel measurment. I don't see any kind of error in the program. ( At least the program does not show any kind of errors) Can anyone please tell me what my problems are? I have attached the VI below.
Attachments:
modified Magnetstriction.vi 96 KB
Hi
When you say it is working for one channel do you mean that if you enter either one of the inputs among Magenetic Flux or Strain you can see both the input and the output signals? I noticed that you have two DAQmx Create Virtual Channel VIs. They are connected to each ohter and to the same array. This essentially translates into the signal being shown in one graph. For learning more on using multichannel programming please refer to Multi Device Sunch--Shared External Convert Clock.vi. Hope this helps.
Ipshita C.
National Instruments
Applications Engineer
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