Table Of Contents

Configure for Homogeneous Triggers (G Dataflow)

Version:
    Last Modified: March 3, 2017

    Configures the properties commonly required for the TClk synchronization of device sessions with homogeneous triggers in a single PXI chassis or a single PC.

    Use this node to configure properties for the Reference Clocks, Start Triggers, Reference Triggers, Script Triggers, and Pause Triggers.

    Programming Patterns
    If Configure For Homogeneous Triggers cannot perform all the steps required for the given sessions, it returns an error. If niTClk Configure For Homogeneous Triggers returns an error, use the instrument driver nodes and properties, along with the following NI-TClk properties, for signal routing.
    • Start Trigger Master Session
    • Reference Trigger Master Session
    • Script Trigger Master Session
    • Pause Trigger Master Session
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    sessions in

    Array of session references that are being synchronized.

    Obtain session references from an instrument driver by using the Get Session Reference node for that driver.

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    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

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    sessions out

    Array of session references passed to the next node.

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    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.

    How is the Reference Clock configured when I use this node?

    The niTClk Configure For Homogeneous Triggers node configures the Reference Clocks if they are needed. Specifically, if you use the internal Sample Clocks or internal Sample Clock timebases, and the Reference Clock Source is either not configured or is set to None (no trigger configured), niTClk Configure For Homogeneous Triggers configures the following:
    • PXI—The Reference Clock Source on all devices is set to be the 10 MHz PXI backplane clock (PXI_CLK10).
    • PCI—One of the devices exports its 10 MHz onboard Reference Clock to RTSI 7. The Reference Clock Source on all devices is set to be RTSI 7.
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    Note  

    If the Reference Clock Source is set to a value other than None, niTClk Configure For Homogeneous Triggers cannot configure the Reference Clock Source.

    Where This Node Can Run:

    Desktop OS: Windows

    FPGA: Not supported


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