Hello,
I am programming a piezo stage to raster scan using the 2 analog output ports on my BNC 2110 connector block. My DAQ card model PCI-6052E. I am using buffered waveform generation to control the scan and at the same time reading the displacement of the stage using 2 analog input ports. For 2 days, my program was working properly and I was able to simultaneously raster scan my stage and read the displacement. However, for some reason, my program no longer works and I have been searching fruitlessly for a solution.
Here is an outline of my application:
1) Generate 2 waveforms
2) Create a multichannel Analog In task
3) Create a multichannel Analog Out task
4) Configure the timing for both task using a waveform from (1)
5) Write the 2 Waveforms using DAQmx_write vi
6) Start the Analog Out task
7) Start the Analog In task
😎 Run DAQmx_read vi
I have learned the following:
I can run DAQmx_write.vi alone
I can run DAQmx_read.vi alone
I cannot run DAQmx_write and DAQmx_read together
As soon as I wire in a DAQmx_write into my block diagram, the DAQmx_read malfunctions. Normally DAQmx_read will spend some
time to read from the buffer, but when I wire in a DAQmx_write, the read vi spontaneously collects all the data. Even though the read vi
should take over a minute to collect all the sample points, I get a set of garbage instantly.
I tried to reinstall the DAQmx 7.2 drivers, but it did not solve my problem
I ran the "Multi-Function-Synch AI-AO.vi" example and have the same problem (and an additional error -- attempted to read samples that are
no longer available)
I have attached a copy of my vi and the subvi's necessary to run the application.
Thankyou,
Long
