thisischris99 Posted July 15, 2010 Report Share Posted July 15, 2010 Hi all, I'm trying to communicate with an instrument that uses serial connection. I have a closed loop wind tunnel algorithm in place that uses a pitot-static system in the wind tunnel to close the control loop (A voltage out controls speed). I am calibrating various anemometers, and previously was using a device that outputted a voltage and was read with a USB DAQ device. I was able to have my control loop run extremely fast prior to using the serial device. Any thoughts on this? Quote Link to comment
Saverio Posted July 16, 2010 Report Share Posted July 16, 2010 Other than the fact that a serial connection will be slower than a USB DAQ I'm not sure what you're really expecting in terms of an answer. Which USB DAQ device were you using? What's your instrument? What's your baud rate? Have you configured the VISA Read to end its read on a termination character? If not, are you accumulating the serial port reads in a loop? What's your loop rate? Quote Link to comment
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