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DAQmx Create Virtual Channel (Analog Input » Charge) (G Dataflow)

Last Modified: February 6, 2017

Creates channel(s) that use(s) a charge-based sensor to measure acceleration.

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task in

task in specifies the task to which to add the virtual channels this node creates. If you do not specify a task, NI-DAQmx creates a task for you, and adds the virtual channels this node creates to that task.

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physical channels

physical channels specifies the names of the physical channels to use to create virtual channels. The DAQmx physical channel constant lists all physical channels on devices and modules installed in the system.

You can also wire a string that contains a list, or range of physical channels, to this input. If you have an array of physical channels, use the DAQmx Flatten Channel String node to convert the array to a list.

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name to assign

name to assign specifies a name to assign to the virtual channel this node creates. If you do not wire a value to this input, NI-DAQmx uses the physical channel name as the virtual channel name.

If you use this input to provide your own names for the virtual channels, you must use the names when you refer to these channels in other NI-DAQmx nodes, such as the source input of the DAQmx Trigger node.

If you create multiple virtual channels with one DAQmx Create Virtual Channel node, you can specify a comma-separated list of names to assign to the virtual channels. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.

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units

units specifies the units to use to return acceleration measurements from the channel.

Name Description
From Custom Scale

Units a custom scale specifies. If you select this value, you must wire a custom scale name to the custom scale name input.

g

1 g is approximately equal to 9.81 m/s/s.

in/s^2 Inches per second per second.
m/s^2

Meters per second per second.

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error in

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

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measurement range

measurement range specifies the minimum and maximum values you expect to measure.

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maximum value

maximum value specifies in units the maximum value you expect to measure.

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minimum value

minimum value specifies in units the minimum value you expect to measure.

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input terminal configuration

input terminal configuration specifies the input terminal configuration for the channel.

Name Description
default

At run time, NI-DAQmx chooses the default terminal configuration for the channel.

Differential

Differential mode.

NRSE

Non-referenced single-ended mode.

Pseudodifferential

Pseudodifferential mode.

RSE

Referenced single-ended mode.

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custom scale name

custom scale name specifies the name of a custom scale for the channel. If you want the channel to use a custom scale, wire the name of the custom scale to this input, and set units to From Custom Scale.

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sensitivity

sensitivity is the sensitivity of the sensor. This value is in the units you specify with the sensitivity units input. Refer to the sensor documentation to determine this value.

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sensitivity units

sensitivity units specifies the units of the sensitivity input.

Name Description
mVolts/g

mVolts/g.

Volts/g

Volts/g.

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task out

task out is a reference to the task after this node runs. The task contains any newly created virtual channels. If you did not wire a value to task in, NI-DAQmx automatically creates the task this output refers to.

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error out

error out contains error information. If error in indicates that an error occurred before this node ran, error out contains the same error information. Otherwise, error out describes the error status that this node produces.

Where This Node Can Run:

Desktop OS: Windows

FPGA: LabVIEW NXG does not support FPGA devices


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