Table Of Contents

stPMU Measure Voltage (G Dataflow)

Version:
Last Modified: September 27, 2017

Measures the voltage on the channels specified in the channel list parameter. You can call this node at any time, including while in a digital state or a PMU state.

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Note  

Only the PXIe-6555 and the PXIe-6556 support this node.

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session in

Instrument session obtained from the Initialize Acquisition Session node, the Initialize Generation Session node, or the Initialize External Calibration node.

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channel list

The channels you want to configure.

Specify multiple channels by using a channel list or a channel range. A channel list is a comma (,) separated sequence of channel names (for example, 0,2 specifies channels 0 and 2). A channel range is a lower bound channel followed by a hyphen (-) or colon (:) followed by an upper bound channel (for example, 0-2 specifies channels 0, 1, and 2).

Use PFI1 or PFI2 to specify a valid PFI channel. Use DDC_CLKOUT or STROBE to specify a valid clocking terminal. If you configure multiple channels with this parameter, all those channels have the same settings. Selecting no channels for this parameter returns an error.

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aperture time (4E-06)

Parameter that configures the amount of time, in seconds, to measure each channel.

The aperture time determines the number of hardware averages per measurement. The larger the aperture time, the greater the number of hardware averages.

Default: 4E^6 (0.000004)

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sense (local)

Parameter that selects between local or remote sensing on the specified channel(s).

Name Value Description
local 88 Local sensing of voltages. This value is measured on the DDC connector.
remote 89 Remote sensing of voltages. This value is measured on the Remote Sense connector.

Default: local

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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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session out

Handle that identifies the session in all subsequent node calls.

The session out parameter is obtained from the Initialize Acquisition Session node or the Initialize Generation Session node.

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voltage measurements

The returned array of double-precision numbers that represents the averaged measured voltages, per channel, in volts (V), over time.

The order of the returned voltages directly corresponds with the order in which the channels are configured in the channel list parameter.

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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.

Committing your session

If you have not yet committed your session, calling this node implicitly commits your session. If you have already committed your session by calling a node such as the Commit node, the Initiate node, the Read Waveform node, the Write Named Waveform node, or the other nodes, this node will not commit your session again.

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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