Detecting When a Digital Line is Between Voltage Levels Using a High-Speed Digital I/O Card Hardware: Digital I/O (DIO)>>High-Speed>>PXI-6542, Digital I/O (DIO)>>High-Speed>>PXI-6551, Digital I/O (DIO)>>High-Speed>>PXI-6552, Digital I/O (DIO)>>High-Speed>>PXI-6561, Digital I/O (DIO)>>High-Speed>>PXI-6562, Digital I/O (DIO)>>High-Speed>>PCI-6541, Digital I/O (DIO)>>High-Speed>>PCI-6542, Digital I/O (DIO)>>High-Speed>>PCI-6551, Digital I/O (DIO)>>High-Speed>>PCI-6552, Digital I/O (DIO)>>High-Speed>>PCI-6561, Digital I/O (DIO)>>High-Speed>>PCI-6562, Digital I/O (DIO)>>High-Speed>>PXI-6541
Problem: Is it possible to detect when a digital line is between voltage levels using a High-Speed Digital I/O card? Solution: Yes, but only with the 655x series of High-Speed Digital I/O cards. The 654x/656x do not support this capability. This can be done with the niHSDIO Configure Data Interpretation VI. You have to set the data interpretation input terminal to "Valid or Invalid". The data being returned will be 1 when the acquired signal is between the Acquisition Voltage High and Acquisition Voltage Low, i.e. mid-band and invalid, and will return 0 otherwise. This is illustrated in the image attached. The Acquisition Voltage High and Acquisition Voltage Low levels can be configured using the niHSDIO Configure Voltage VI. Related Links: Attachments:
Report Date: 08/15/2005 Last Updated: 08/26/2005 Document ID: 3OEDQP9N |
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