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IviScope Configure AC Line Trigger Slope [AT] (G Dataflow)

Last Modified: October 24, 2017

Specifies the slope of the zero crossing upon which the scope triggers.

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ac line trigger slope

Value that specifies whether you want the oscilloscope to trigger on a zero crossing with a positive, negative, or either slope of the network supply voltage. The driver uses this value to set the IVISCOPE_ATTR_AC_LINE_TRIGGER_SLOPE attribute.

Defined Values

IVISCOPE_VAL_AC_LINE_POSITIVE Positive crossing
IVISCOPE_VAL_AC_LINE_NEGATIVE Negative crossing
IVISCOPE_VAL_AC_LINE_EITHER Either crossing

Default: IVISCOPE_VAL_AC_LINE_POSITIVE

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instrument handle out

The instrument handle that you obtain from the IviScope Initialize or IviScope Initialize With Options node. The handle identifies a particular instrument session.

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instrument handle

The instrument handle that you obtain from the IviScope Initialize or IviScope Initialize With Options node. The handle identifies a particular instrument session.

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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.
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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

Defined Values

AC Line Positive Configures the oscilloscope to trigger on positive slope zero crossings of the network supply voltage.
AC Line Negative Configures the oscilloscope to trigger on negative slope zero crossings of the network supply voltage.
AC Line Either Configures the oscilloscope to trigger on either positive or negative slope zero crossings of the network supply voltage.

Where This Node Can Run:

Desktop OS: Windows

FPGA: Not supported

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


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