Converting NI 9250 Data (FPGA Interface)

NI CompactRIO Device Drivers Help

Edition Date: December 2017

Part Number: 373197L-01

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Set the Calibration Mode to Calibrated in the C Series Module Properties dialog box for the NI 9250 if you want the FPGA I/O Node to return calibrated, fixed-point data from the module. Set the Calibration Mode to Raw if you want the FPGA I/O Node to return calibrated, binary data from the module. If you set the Calibration Mode to Raw, you must convert the binary values to engineering units. You must convert these values in the host VI.

You can use the following equations in the host VI to convert binary voltage values to volts:

Volts = Binary Value × 608896 pV/LSB

where Binary Value is the value returned by the FPGA I/O Node.

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