Table Of Contents

IviDmm Initiate (G Dataflow)

Version:
    Last Modified: October 23, 2017

    Initiates a measurement.

    After you call this node, the DMM leaves the Idle state and waits for a trigger. This node applies default values to properties that have not been set by the user under the following conditions: (1) If the user has not set the value of any property in the IviDmmMultiPoint extension group, the node sets the IviDmm>>Multi-Point Acquisition>>Sample Count [MP] and IviDmm>>Multi-Point Acquisition>>Trigger Count [MP] properties to 1. (2) If the user has not set the value of the IviDmm>Measurement Operation Options>Auto Zero [AZ] property, the node sets the value of this property to IVIDMM_VAL_AUTO_ZERO_OFF (0). Notes: (1) This node does not check the instrument status.

    Typically, you call this node only in a sequence of calls to other low-level driver nodes. The sequence performs one operation. You use the low-level VIs to optimize one or more aspects of interaction with the instrument. If you want to check the instrument status, call the IviDmm Error-Query Node at the conclusion of the sequence. (2) This node performs interchangeability checking when the IviDmm>>Inherent IVI Settings>>User Options>>Interchange Check property is set to TRUE. If the IviDmm>>Inherent IVI Settings>>User Options>>Spy property is set to TRUE, you use the NI I/O Trace utility to view interchangeability warnings. You use the IviDmm Get Next Interchange Warning Node to retrieve interchangeability warnings when the IviDmm>>Inherent IVI Settings>>User Options>>Spy property is set to FALSE. For more information about interchangeability checking, refer to the help text for the IviDmm>>Inherent IVI Settings>>User Options>>Interchange Check property. (3) The class driver initiates a simulated measurement when this node is called and the IviDmm>>Inherent IVI Settings>>User Options>>Simulate property is set to TRUE and the IviDmm>>Inherent IVI Settings>>User Options>>Use Specific Simulation property is set to FALSE. For information on how to configure a simulated measurement, refer to the online help manual.

    connector_pane_image
    datatype_icon

    error in

    Error conditions that occur before this node runs.

    The node responds to this input according to standard error behavior.

    Standard Error Behavior

    Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

    error in does not contain an error error in contains an error
    If no error occurred before the node runs, the node begins execution normally.

    If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

    If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

    Default: No error

    datatype_icon

    instrument handle

    The instrument handle that you obtain from the IviDmm Initialize Node. The handle identifies a particular instrument session.

    Default: None

    datatype_icon

    instrument handle out

    The instrument handle that you obtain from the IviDmm Initialize Node. The handle identifies a particular instrument session.

    Default: None

    datatype_icon

    error out

    Error information.

    The node produces this output according to standard error behavior.

    Standard Error Behavior

    Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

    error in does not contain an error error in contains an error
    If no error occurred before the node runs, the node begins execution normally.

    If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

    If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

    Where This Node Can Run:

    Desktop OS: Windows

    FPGA: Not supported

    Web Server: Not supported in VIs that run in a web application


    Recently Viewed Topics