ReadStatus Function

Serial polls a single device to get its status byte.

Refer to GPIB Function Defaults for more information about the timeout and address defaults.


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Inputs/Outputs

  • ci32.png bus —

    bus refers to the GPIB bus number. If you have only one GPIB interface in your computer, the default bus number is 0.

    Refer to the software installation instructions included with the GPIB controller for additional GPIB interfaces.
  • ci16.png address —

    address contains the primary address of the GPIB device with which the function communicates.

    If a secondary address is required, use the MakeAddr function to format the primary and secondary addresses.
  • cerrcodeclst.png error in —

    error in describes error conditions that occur before this node runs. This input provides standard error in functionality.

  • ii16.png serial poll response —

    serial poll response is the status byte of the device at address.

    Refer to the documentation supplied with the device to learn how to interpret this byte.
  • i1dbool.png status —

    status is a Boolean array in which each bit describes a state of the GPIB Controller.

    If an error occurs, the function sets bit 15. GPIB error is valid only if bit 15 of status is set.

    The following table shows the numeric value and symbolic status of each bit in status. This table also includes a description of each bit.
    Status BitNumeric ValueSymbolic StatusDescription
    01DCASDevice Clear state
    12DTASDevice Trigger State
    24LACSListener Active
    38TACSTalker Active
    416ATNAttention Asserted
    532CICController-In-Charge
    664REMRemote State
    7128LOKLockout State
    8256CMPLOperation Completed
    124096SRQISRQ Detected while CIC
    138192ENDEOI or EOS Detected
    1416384TIMOTimeout
    15-32768ERRError Detected
  • ierrcodeclst.png error out —

    error out contains error information. This output provides standard error out functionality.