NationalInstruments.DAQmx Namespace

NI-DAQmx 17.1 .NET Class Library Help

Edition Date: June 2017

Part Number: 370473J-01

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Contains classes, delegates, and enumerations that provide a .NET interface to NI-DAQmx. You can use this class library to communicate with and control a NI data acquisition (DAQ) device. Some DAQ devices are not currently supported by the NI-DAQmx driver. Refer to NI-DAQ Readme for a complete listing of supported hardware.

Refer to Using the Measurement Studio NI-DAQmx .NET Library for more information.

Classes

	Class	Description
	AdvanceTrigger	Contains properties and methods that configure how the switch task advances to the next entry in the scan list and causes the switch to advance programmatically.
	AIChannel	Encapsulates one or more analog input virtual channels and the properties for an analog input virtual channel.
	AIChannelCollection	Contains the collection of analog input channels for a Task.
	AnalogEdgeReferenceTrigger	Contains properties to configure analog edgereference triggers.
	AnalogEdgeStartTrigger	Contains properties to configure analog edgestart triggers. For more information, refer to StartTrigger.
	AnalogLevelPauseTrigger	Contains properties to configure analog levelpause triggers. For more information, refer to PauseTrigger.
	AnalogMultiChannelReader	Contains methods for reading samples from one or more analog input channels in a task.
	AnalogMultiChannelWriter	Contains methods for writing samples to one or more analog output channels in a task.
	AnalogMultiEdgeReferenceTrigger	Provides properties for configuring analog multi-edge reference triggers.
	AnalogMultiEdgeStartTrigger	Provides properties for configuring analog multi-edge start triggers.
	AnalogSingleChannelReader	Contains methods for reading samples from the analog input channel in a task.
	AnalogSingleChannelWriter	Contains methods for writing samples to the analog output channel in a task.
	AnalogUnscaledReader	Contains methods that read unscaled samples from a task.
	AnalogUnscaledWriter	Contains methods that write unscaled samples to a task.
	AnalogWindowPauseTrigger	Contains properties to configure analog windowpause triggers. For more information, refer to PauseTrigger.
	AnalogWindowReferenceTrigger	Contains properties to configure analog windowreference triggers. For more information, refer to ReferenceTrigger.
	AnalogWindowStartTrigger	Contains properties to configure analog windowstart triggers. For more information, refer to StartTrigger.
	AOChannel	Encapsulates one or more analog output channels and the properties for an analog output channel.
	AOChannelCollection	Contains the collection of analog output channels for a Task.
	ArmStartTrigger	Contains properties and methods that configure a trigger that arms the task for a start trigger. For more information, refer to StartTrigger.
	Channel	Represents a channel or a set of channels and the properties you can set on a channel.
	CIChannel	Encapsulates one counter/timer input channel and the properties for a counter/timer input channel.
	CIChannelCollection	Contains the collection of counter/timer input channels for a Task.
	COChannel	Encapsulates one or more counter/timer output channels and the properties for a counter/timer output channel.
	COChannelCollection	Contains the collection of counter/timer output channels for a Task.
	CounterMultiChannelReader	Contains methods for reading samples from one or more counter input channels in a task.
	CounterMultiChannelWriter	Contains methods for writing samples to one or more counter output channels in a counter output task.
	CounterOutputEventArgs	Provides data for the CounterOutput event.
	CounterReader	Obsolete. Contains methods for reading samples from one or more counter input channels in a task.
	CounterSingleChannelReader	Contains methods for reading samples from the counter input channel in a task.
	CounterSingleChannelWriter	Contains methods for writing samples to a single counter output channel in a counter output task.
	DaqBuffer	Exposes a buffer on a Task that can be used to read or write samples to or from an NI-DAQmx task.
	DaqException	Represents the exception that is thrown when an NI-DAQmx driver error occurs.
	DaqStream	Exposes a data stream on a Task that can be used to control reading and writing behavior and can be used in conjunction with reader and writer classes to read or write samples to or from an NI-DAQmx task.
	DaqSystem	Contains methods that access tasks, scales, and global channels stored in Measurement Automation Explorer (MAX), performs immediate operations on DAQ hardware, and creates classes from which you can get information about the hardware.
	DaqWarningEventArgs	Provides data for the DaqWarning event.
	Device	Encapsulates a DAQ device and contains methods and properties that operate on devices outside the context of a task.
	DIChannel	Encapsulates one or more digital input channels and the properties for a digital input channel.
	DIChannelCollection	Contains the collection of digital input channels for a Task.
	DigitalChangeDetectionEventArgs	Provides data for the DigitalChangeDetection event.
	DigitalEdgeAdvanceTrigger	Contains properties to configure digital edgeadvance triggers. For more information, refer to AdvanceTrigger.
	DigitalEdgeArmStartTrigger	Contains properties to configure digital edgearm start triggers. For more information, refer to ArmStartTrigger.
	DigitalEdgeReferenceTrigger	Contains properties to configure digital edgereference triggers. For more information, refer to ReferenceTrigger.
	DigitalEdgeStartTrigger	Contains properties to configure digital edgestart triggers. For more information, refer to StartTrigger.
	DigitalEdgeWatchdogExpirationTrigger	Contains properties to configure digital edgewatchdog expiration triggers. For more information, refer to WatchdogExpirationTrigger.
	DigitalLevelPauseTrigger	Contains properties to configure digital levelpause triggers. For more information, refer to PauseTrigger.
	DigitalMultiChannelReader	Contains methods for reading samples from one or more digital input or output channels in a task.
	DigitalMultiChannelWriter	Contains methods for writing samples to one or more digital output channels in a task.
	DigitalPatternPauseTrigger	Contains properties that let a task pause the acquisition or generation when the device matches a digital pattern.
	DigitalPatternReferenceTrigger	Contains properties that let a task stop the acquisition when the device acquires all pretrigger samples, matches a digital pattern, and acquires all posttrigger samples.
	DigitalPatternStartTrigger	Contains properties that let a task start acquiring or generating samples when a digital pattern is matched.
	DigitalSingleChannelReader	Contains methods for reading samples from the digital input or output channel in a task.
	DigitalSingleChannelWriter	Contains methods for writing samples to the digital output channel in a task.
	DOChannel	Encapsulates one or more digital output channels and the properties for a digital output channel.
	DOChannelCollection	Contains the collection of digital output channels for a Task.
	EveryNSamplesReadEventArgs	Provides data for the EveryNSamplesRead event.
	EveryNSamplesWrittenEventArgs	Provides data for the EveryNSamplesWritten event.
	ExportSignals	Encapsulates the signals that are available for routing off of the DAQ device, the properties that define which terminal the signals are routed to, and the programmable characteristics of the signals for a Task.
	ExternalCalibrationSession	Represents a handle to an external calibration session on a device.
	HandshakeTrigger	Contains properties and methods that configure handshake trigger signals on a task.
	InterlockedHandshakeTrigger	Contains properties to configure interlocked handshake triggers. For more information, refer to HandshakeTrigger.
	LinearScale	Encapsulates a linear custom scale that scales values using the equation y = mx + b.
	PauseTrigger	Contains properties and methods that configure signals and triggers that pause a task.
	PhysicalChannel	Encapsulates one or more channels on an NI-DAQmx device and contains functions and properties that operate on the channel outside the context of a task.
	PolynomialScale	Encapsulates a custom scale that scales values by using an nth-order polynomial equation.
	RangeMapScale	Encapsulates a custom scale that scales values proportionally from a range of prescaled values to a range of scaled values.
	ReferenceTrigger	Contains properties and methods that configure the trigger that creates the reference point between the pretrigger samples and the post-trigger samples.
	SampleClockEventArgs	Provides data for the SampleClock event.
	SampleCompleteEventArgs	Provides data for the SampleComplete event.
	SavedChannelInfo	Encapsulates information about a global channel stored in Measurement Automation Explorer (MAX). You can retrieve an instance of this class by calling GetSavedChannelInfo.
	SavedScaleInfo	Encapsulates information about a custom scale stored in Measurement Automation Explorer (MAX). You can retrieve an instance of this class by calling GetSavedScaleInfo.
	SavedTaskInfo	Encapsulates information about a task stored in Measurement Automation Explorer (MAX). You can retrieve an instance of this class by calling GetSavedTaskInfo.
	Scale	Encapsulates a custom scale that translates between prescaled quantities in device units and quantities scaled to the units of interest.
	SinglePoint	Contains properties and methods that configure how to align to the sample clock of the Task.
	StartTrigger	Contains properties and methods that configure how the task begins measurement or generation.
	Switch	Obsolete. Encapsulates a switch device and contains properties and methods that operate on switch devices outside the context of a task.
	SwitchChannel	Obsolete. Encapsulates a channel on a switch device and contains properties and methods that operate on switch channels outside the context of a task. This class also defines the intended use of particular switch channels in tasks.
	SwitchScan	Obsolete. Contains properties for a switch scan list.
	TableScale	Encapsulates a custom scale that maps an array of prescaled values to an array of corresponding scaled values, with all other values scaled proportionally.
	Task	Represents a collection of virtual channels and their per-channel properties and timing, triggering, and other properties that apply to the DAQmx Task.
	TaskDoneEventArgs	Provides data for the Done event.
	TimeArmStartTrigger	Provides properties for configuring time arm start triggers.
	TimeStartTrigger	Provides properties for configuring time start triggers.
	Timing	Contains properties and methods that configure the sample timing and duration of the Task.
	Triggers	Contains members that configure all of the triggers that can affect a Task.
	Watchdog	Contains properties and methods for configuring and controlling a watchdog timerTask.
	WatchdogExpirationTrigger	Contains properties and methods that configure a trigger to cause the watchdog to expire in a watchdog timer task.

Structures

	Structure	Description
	CIDataFrequency	Encapsulates a counter input specified in terms of frequency and duty cycle.
	CIDataTicks	Encapsulates a counter input specified in terms of timebase ticks.
	CIDataTime	Encapsulates a counter input specified in terms of time.
	CODataFrequency	Encapsulates a counter output specified in terms of frequency and duty cycle.
	CODataTicks	Encapsulates a counter output specified in terms of timebase ticks.
	CODataTime	Encapsulates a counter output specified in terms of time.

Interfaces

	Interface	Description
	IFilteredTypeDescriptor	Defines the interface that is implemented by all Task subobjects that can perform property filtering by programmatically returning an ICustomTypeDescriptor that contains the list of filtered properties for the subobject.

Delegates

	Delegate	Description
	CounterOutputEventHandler	Represents the method that handles the CounterOutput event.
	DaqWarningEventHandler	Represents the method that handles the DaqWarning event.
	DigitalChangeDetectionEventHandler	Represents the method that handles the DigitalChangeDetection event.
	EveryNSamplesReadEventHandler	Represents the method that handles the EveryNSamplesRead event.
	EveryNSamplesWrittenEventHandler	Represents the method that handles the EveryNSamplesWritten event.
	SampleClockEventHandler	Represents the method that handles the SampleClock event.
	SampleCompleteEventHandler	Represents the method that handles the SampleComplete event.
	TaskDoneEventHandler	Represents the method that handles the Done event.

Enumerations

	Enumeration	Description
	AdvanceCompleteEventPulsePolarity	Specifies the polarity of the exported Advance Complete Event.
	AdvanceTriggerPulsePolarity	Indicates the polarity of the exported Advance Trigger.
	AdvanceTriggerPulseWidthUnits	Specifies the units of AdvanceTriggerPulseWidth.
	AdvanceTriggerType	Obsolete. (Deprecated) Specifies the type of trigger to use to advance to the next entry in a switch scan list.
	AIAccelerationChargeSensitivityUnits	Specifies the units of AI.Accel.Charge.Sensitivity.
	AIAccelerationFourWireDCVoltageSensitivityUnits	Specifies the units of AI.Accel.4WireDCVoltage.Sensitivity.
	AIAccelerationUnits	Specifies the units to use to return acceleration measurements from the channel.
	AIAccelerometerSensitivityUnits	Specifies the units of AccelerometerSensitivity.
	AIACExcitationWireMode	Specifies the number of leads on the LVDT or RVDT. Some sensors require you to tie leads together to create a four- or five- wire sensor. Refer to the sensor documentation for more information.
	AIAdcTimingMode	Specifies the ADC timing mode, controlling the tradeoff between speed and effective resolution. Some ADC timing modes provide increased powerline noise rejection. On devices that have an AI Convert clock, this setting affects both the maximum and default values for AIConvertRate. You must use the same ADC timing mode for all channels on a device, but you can use different ADC timing modes for different devices in the same task.
	AIAutoZeroMode	Specifies how often to measure ground. NI-DAQmx subtracts the measured ground voltage from every sample.
	AIBridgeConfiguration	Specifies the type of Wheatstone bridge connected to the channel.
	AIBridgeElectricalUnits	Specifies from which electrical unit to scale data. Select the same unit that the sensor data sheet or calibration certificate uses for electrical values.
	AIBridgePhysicalUnits	Specifies to which physical unit to scale electrical data. Select the same unit that the sensor data sheet or calibration certificate uses for physical values.
	AIBridgeScaleType	Specifies the scaling type to use when scaling electrical values from the sensor to physical units.
	AIBridgeShuntCalibrationSelect	Specifies which shunt calibration switch(es) to enable. Use BridgeShuntCalibrationEnable to enable the switch(es) you specify with this property.
	AIBridgeUnits	Specifies in which unit to return voltage ratios from the channel.
	AIChannelCalibrationScaleType	Specifies the method or equation form that the calibration scale uses.
	AIChargeUnits	Specifies the units to use to return charge measurements from the channel.
	AIConvertActiveEdge	Specifies on which edge of the clock pulse an analog-to-digital conversion takes place.
	AIConvertClockPulsePolarity	Indicates the polarity of the exported AI Convert Clock. The polarity is fixed and independent of the active edge of the source of the AI Convert Clock.
	AIConvertTimebaseSource	Specifies the terminal of the signal to use as the AI Convert Clock Timebase.
	AICoupling	Specifies the coupling for the channel.
	AICurrentAcrmsUnits	Specifies the units to use to return current RMS measurements from the channel.
	AICurrentShuntLocation	Specifies the shunt resistor location for current measurements.
	AICurrentUnits	Specifies the units to use to return current measurements from the channel.
	AIDataTransferMechanism	Specifies the data transfer mode for the device.
	AIDataTransferRequestCondition	Specifies under what condition to transfer data from the onboard memory of the device to the buffer.
	AIDigitalFilterType	Indicates the AI digital filter types supported by the device.
	AIEddyCurrentProximityProbeSensitivityUnits	Specifies the units of EddyCurrentProximityProbeSensitivity.
	AIEddyCurrentProximityProbeUnits	Specifies the units to use to return proximity measurements from the channel.
	AIExcitationDCOrAC	Specifies if the excitation supply is DC or AC.
	AIExcitationSense	Specifies whether to use local or remote sense to sense excitation.
	AIExcitationSource	Specifies the source of excitation.
	AIExcitationVoltageOrCurrent	Specifies if the channel uses current or voltage excitation.
	AIFilterDelayUnits	Specifies the units of FilterDelay and FilterDelayAdjustment.
	AIForceIepeSensorSensitivityUnits	Specifies the units for ForceIepeSensorSensitivity.
	AIForceUnits	Specifies in which unit to return force or load measurements from the channel.
	AIFrequencyUnits	Specifies the units to use to return frequency measurements from the channel.
	AIHoldCompleteEventPulsePolarity	Specifies the polarity of an exported AI Hold Complete Event pulse.
	AILowpassSwitchedCapacitorClockSource	Specifies the source of the filter clock. If you need a higher resolution for the filter, you can supply an external clock to increase the resolution. Refer to the SCXI-1141/1142/1143 User Manual for more information.
	AILvdtSensitivityUnits	Specifies the units of LvdtSensitivity.
	AILvdtUnits	Specifies the units to use to return linear position measurements from the channel.
	AIMeasurementType	Indicates the measurement to take with the analog input channel and in some cases, such as for temperature measurements, the sensor to use.
	AIPressureUnits	Specifies in which unit to return pressure measurements from the channel.
	AIRawDataCompressionType	Specifies the type of compression to apply to raw samples returned from the device.
	AIRawSampleJustification	Indicates the justification of a raw sample from the device.
	AIResistanceConfiguration	Specifies the resistance configuration for the channel. NI-DAQmx uses this value for any resistance-based measurements, including temperature measurement using a thermistor or RTD.
	AIResistanceUnits	Specifies the units to use to return resistance measurements.
	AIResolutionUnits	Indicates the units of Resolution.
	AIRosetteMeasurementType	Specifies the type of rosette measurement.
	AIRosetteType	Indicates the type of rosette gage.
	AIRtdType	Specifies the type of RTD connected to the channel.
	AIRvdtSensitivityUnits	Specifies the units of RvdtSensitivity.
	AIRvdtUnits	Specifies the units to use to return angular position measurements from the channel.
	AISoundPressureUnits	Specifies the units to use to return sound pressure measurements from the channel.
	AIStrainGageConfiguration	Specifies the bridge configuration of the strain gages.
	AIStrainUnits	Specifies the units to use to return strain measurements from the channel.
	AITemperatureUnits	Specifies the units to use to return temperature measurements from the channel.
	AITerminalConfiguration	Specifies the terminal configuration for the channel.
	AIThermocoupleCjcSource	Indicates the source of cold-junction compensation.
	AIThermocoupleScaleType	Specifies the method or equation form that the thermocouple scale uses.
	AIThermocoupleType	Specifies the type of thermocouple connected to the channel. Thermocouple types differ in composition and measurement range.
	AITorqueUnits	Specifies in which unit to return torque measurements from the channel.
	AIVelocityIepeSensorSensitivityUnits	Specifies the units for VelocityIepeSensorSensitivity.
	AIVelocityUnits	Specifies in which unit to return velocity measurements from the channel.
	AIVoltageAcrmsUnits	Specifies the units to use to return voltage RMS measurements from the channel.
	AIVoltageUnits	Specifies the units to use to return voltage measurements from the channel.
	AnalogEdgePauseTriggerCoupling	Specifies the coupling for the source signal of the trigger if the source is a terminal rather than a virtual channel.
	AnalogEdgeReferenceTriggerCoupling	Specifies the coupling for the source signal of the trigger if the source is a terminal rather than a virtual channel.
	AnalogEdgeReferenceTriggerSlope	Specifies on which slope of the source signal the Reference Trigger occurs.
	AnalogEdgeStartTriggerCoupling	Specifies the coupling for the source signal of the trigger if the source is a terminal rather than a virtual channel.
	AnalogEdgeStartTriggerSlope	Specifies on which slope of the trigger signal to start acquiring or generating samples.
	AnalogLevelPauseTriggerCondition	Specifies whether the task pauses above or below the threshold you specify with Level.
	AnalogMultiEdgeReferenceTriggerCoupling	Specifies an array that describes the couplings for the corresponding source signal of the trigger if the source is a terminal rather than a virtual channel. Each element of the array corresponds to a source in Ref.AnlgMultiEdge.Srcs and an element in each of the other Analog Multi Edge property arrays, if they are not empty.
	AnalogMultiEdgeReferenceTriggerSlope	Specifies an array of slopes on which to trigger task to start generating or acquiring samples. Each element of the array corresponds to a source in Ref.AnlgMultiEdge.Srcs and an element in each of the other Analog Multi Edge property arrays, if they are not empty.
	AnalogMultiEdgeStartTriggerCoupling	Specifies an array that describes the couplings for the corresponding source signal of the trigger if the source is a terminal rather than a virtual channel. Each element of the array corresponds to a source in Start.AnlgMultiEdge.Srcs and an element in each of the other Analog Multi Edge property arrays, if they are not empty.
	AnalogMultiEdgeStartTriggerSlope	Specifies an array of slopes on which to trigger task to start generating or acquiring samples. Each element of the array corresponds to a source in Start.AnlgMultiEdge.Srcs and an element in each of the other Analog Multi Edge property arrays, if they are not empty.
	AnalogWindowPauseTriggerCondition	Specifies whether the task pauses while the trigger signal is inside or outside the window you specify with WindowBottom and WindowTop.
	AnalogWindowPauseTriggerCoupling	Specifies the coupling for the source signal of the terminal if the source is a terminal rather than a virtual channel.
	AnalogWindowReferenceTriggerCondition	Specifies whether the Reference Trigger occurs when the source signal enters the window or when it leaves the window. Use WindowBottom and WindowTop to specify the window.
	AnalogWindowReferenceTriggerCoupling	Specifies the coupling for the source signal of the trigger if the source is a terminal rather than a virtual channel.
	AnalogWindowStartTriggerCondition	Specifies whether the task starts acquiring or generating samples when the signal enters or leaves the window you specify with WindowBottom and WindowTop.
	AnalogWindowStartTriggerCoupling	Specifies the coupling for the source signal of the trigger if the source is a terminal rather than a virtual channel.
	AOCurrentUnits	Specifies in what units to generate current on the channel. Write data to the channel in the units you select.
	AODacOffsetSource	Specifies the source of the DAC offset voltage. The value of this voltage source determines the full-scale value of the DAC.
	AODacReferenceSource	Specifies the source of the DAC reference voltage. The value of this voltage source determines the full-scale value of the DAC.
	AODataTransferMechanism	Specifies the data transfer mode for the device.
	AODataTransferRequestCondition	Specifies under what condition to transfer data from the buffer to the onboard memory of the device.
	AOFilterDelayUnits	Specifies the units of FilterDelay and FilterDelayAdjustment.
	AOFunctionGenerationModulationType	Specifies if the device generates a modulated version of the waveform using the original waveform as a carrier and input from an external terminal as the signal.
	AOFunctionGenerationType	Specifies the kind of the waveform to generate.
	AOIdleOutputBehavior	Specifies the state of the channel when no generation is in progress.
	AOOutputType	Indicates whether the channel generates voltage, current, or a waveform.
	AOPowerUpOutputBehavior	Specifies the analog output state of the physical channels for some devices when your computer is powered on or the device is reset in NI-DAQmx.
	AOResolutionUnits	Specifies the units of Resolution.
	AOTerminalConfiguration	Specifies the terminal configuration of the channel.
	AOVoltageUnits	Specifies in what units to generate voltage on the channel. Write data to the channel in the units you select.
	ArmStartTriggerTimestampTimescale	Specifies the arm start trigger timestamp timescale.
	ArmStartTriggerType	Specifies the type of trigger to use to arm the task for a Start Trigger. If you configure an Arm Start Trigger, the task does not respond to a Start Trigger until the device receives the Arm Start Trigger.
	BasicTedsDataOption	Specifies how to handle basic TEDS data in a TEDS bitstream.
	BridgeShuntCalibrationSource	Specifies whether to use internal or external shunt when Shunt Cal A is selected.
	CalibrationCoupling9775	Represents the coupling of the calibration constants to be adjusted on the C Series NI 9775.
	CalibrationInputTerminalConfiguration4463	Specifies the input terminal configuration for the channel to calibrate on an NI PXIe 4463 device.
	CalibrationInputTerminalConfiguration9209	Specifies the input terminal configuration for the channel to calibrate on an NI 9209 device.
	CalibrationMode4339	Specifies which measurements to use to calibrate an NI 4339 device.
	CalibrationMode4480	Specifies which measurements to use to calibrate an NI 4480 device.
	ChangeDetectionEventPulsePolarity	Specifies the polarity of an exported Change Detection Event pulse.
	ChannelLineGrouping	Specifies how to group digital lines into one or more virtual channels.
	ChannelSynchronizationUnlockBehavior	Specifies the action to take if the target loses its synchronization to the grand master.
	ChannelType	Indicates the type of the virtual channel.
	CIAngularEncoderUnits	Specifies the units to use to return angular position measurements from the channel.
	CICountEdgesActiveEdge	Specifies on which edges to increment or decrement the counter.
	CICountEdgesCountDirection	Specifies whether to increment or decrement the counter on each edge.
	CICountEdgesCountDirectionLogicLevelBehavior	Specifies the logic level behavior on the count reset line.
	CICountEdgesCountDirectionTerminalConfiguration	Specifies the input terminal configuration.
	CICountEdgesCountResetActiveEdge	Specifies on which edge of the signal to reset the count.
	CICountEdgesCountResetLogicLevelBehavior	Specifies the logic level behavior on the count reset line.
	CICountEdgesCountResetTerminalConfiguration	Specifies the input terminal configuration.
	CICountEdgesGateLogicLevelBehavior	Specifies the logic level behavior on the gate input line.
	CICountEdgesGatePauseState	Specifies whether the counter gates input pulses while the signal is high or low.
	CICountEdgesGateTerminalConfiguration	Specifies the gate terminal configuration.
	CICountEdgesLogicLevelBehavior	Specifies the logic level behavior on the input line.
	CICountEdgesTerminalConfiguration	Specifies the input terminal configuration.
	CICounterTimebaseActiveEdge	Specifies whether a timebase cycle is from rising edge to rising edge or from falling edge to falling edge.
	CIDataTransferMechanism	Specifies the data transfer mode for the channel.
	CIDataTransferRequestCondition	Specifies under what condition to transfer data from the onboard memory of the device to the buffer.
	CIDutyCycleLogicLevelBehavior	Specifies the logic level behavior on the input line.
	CIDutyCycleStartingEdge	Specifies which edge of the input signal to begin the duty cycle measurement.
	CIDutyCycleTerminalConfiguration	Specifies the input terminal configuration.
	CIEncoderAInputLogicLevelBehavior	Specifies the logic level behavior on the input line.
	CIEncoderAInputTerminalConfiguration	Specifies the input terminal configuration.
	CIEncoderBInputLogicLevelBehavior	Specifies the logic level behavior on the input line.
	CIEncoderBInputTerminalConfiguration	Specifies the input terminal configuration.
	CIEncoderDecodingType	Specifies how to count and interpret the pulses the encoder generates on signal A and signal B. X1, X2, and X4 are valid for quadrature encoders only. TwoPulseCounting is valid for two-pulse encoders only.
	CIEncoderZIndexPhase	Specifies the states at which signal A and signal B must be while signal Z is high for NI-DAQmx to reset the measurement. If signal Z is never high while signal A and signal B are high, for example, you must choose a phase other than AHighBHigh.
	CIEncoderZInputLogicLevelBehavior	Specifies the logic level behavior on the input line.
	CIEncoderZInputTerminalConfiguration	Specifies the input terminal configuration.
	CIFrequencyLogicLevelBehavior	Specifies the logic level behavior on the input line.
	CIFrequencyMeasurementMethod	Specifies the method to use to measure the frequency of the signal.
	CIFrequencyStartingEdge	Specifies between which edges to measure the frequency of the signal.
	CIFrequencyTerminalConfiguration	Specifies the input terminal configuration.
	CIFrequencyUnits	Specifies the units to use to return frequency measurements.
	CIGpsSyncMethod	Specifies the method to use to synchronize the counter to a GPS receiver.
	CILinearEncoderUnits	Specifies the units to use to return linear encoder measurements from the channel.
	CIMeasurementType	Indicates the measurement to take with the channel.
	CIOutputState	Indicates the current state of the out terminal of the counter.
	CIPeriodLogicLevelBehavior	Specifies the logic level behavior on the input line.
	CIPeriodMeasurementMethod	Specifies the method to use to measure the period of the signal.
	CIPeriodStartingEdge	Specifies between which edges to measure the period of the signal.
	CIPeriodTerminalConfiguration	Specifies the input terminal configuration.
	CIPeriodUnits	Specifies the unit to use to return period measurements.
	CIPulseFrequencyLogicLevelBehavior	Specifies the logic level behavior on the count reset line.
	CIPulseFrequencyStartingEdge	Specifies on which edge of the input signal to begin pulse measurement.
	CIPulseFrequencyTerminalConfiguration	Specifies the input terminal configuration.
	CIPulseFrequencyUnits	Specifies the units to use to return pulse specifications in terms of frequency.
	CIPulseTicksLogicLevelBehavior	Specifies the logic level behavior on the count reset line.
	CIPulseTicksStartingEdge	Specifies on which edge of the input signal to begin pulse measurement.
	CIPulseTicksTerminalConfiguration	Specifies the input terminal configuration.
	CIPulseTimeLogicLevelBehavior	Specifies the logic level behavior on the count reset line.
	CIPulseTimeStartingEdge	Specifies on which edge of the input signal to begin pulse measurement.
	CIPulseTimeTerminalConfiguration	Specifies the input terminal configuration.
	CIPulseTimeUnits	Specifies the units to use to return pulse specifications in terms of high time and low time.
	CIPulseWidthLogicLevelBehavior	Specifies the logic level behavior on the input line.
	CIPulseWidthStartingEdge	Specifies on which edge of the input signal to begin each pulse width measurement.
	CIPulseWidthTerminalConfiguration	Specifies the input terminal configuration.
	CIPulseWidthUnits	Specifies the units to use to return pulse width measurements.
	CISampleClockOverrunBehavior	Specifies the counter behavior when data is read but a new value was not detected during a sample clock.
	CISemiPeriodLogicLevelBehavior	Specifies the logic level behavior on the count reset line.
	CISemiPeriodStartingEdge	Specifies on which edge of the input signal to begin semi-period measurement. Semi-period measurements alternate between high time and low time, starting on this edge.
	CISemiPeriodTerminalConfiguration	Specifies the input terminal configuration.
	CISemiPeriodUnits	Specifies the units to use to return semi-period measurements.
	CITimestampUnits	Specifies the units to use to return timestamp measurements.
	CITwoEdgeSeparationFirstEdge	Specifies on which edge of the first signal to start each measurement.
	CITwoEdgeSeparationFirstLogicLevelBehavior	Specifies the logic level behavior on the input line.
	CITwoEdgeSeparationFirstTerminalConfiguration	Specifies the input terminal configuration.
	CITwoEdgeSeparationSecondEdge	Specifies on which edge of the second signal to stop each measurement.
	CITwoEdgeSeparationSecondLogicLevelBehavior	Specifies the logic level behavior on the count reset line.
	CITwoEdgeSeparationSecondTerminalConfiguration	Specifies the input terminal configuration.
	CITwoEdgeSeparationUnits	Specifies the units to use to return two-edge separation measurements from the channel.
	CIVelocityAInputLogicLevelBehavior	Specifies the logic level behavior of the input terminal.
	CIVelocityAInputTerminalConfiguration	Specifies the input terminal configuration.
	CIVelocityAngularEncoderUnits	Specifies the units to use to return angular velocity counter measurements.
	CIVelocityBInputLogicLevelBehavior	Specifies the logic level behavior of the input terminal.
	CIVelocityBInputTerminalConfiguration	Specifies the input terminal configuration.
	CIVelocityEncoderType	Specifies how to count and interpret the pulses the encoder generates on signal A and signal B. X1, X2, and X4 are valid for quadrature encoders only. Two Pulse Counting is valid for two-pulse encoders only.
	CIVelocityLinearEncoderUnits	Specifies the units to use to return linear encoder velocity measurements from the channel.
	COConstrainedGenerationMode	Specifies constraints to apply when the counter generates pulses. Constraining the counter reduces the device resources required for counter operation. Constraining the counter can also allow additional analog or counter tasks on the device to run concurrently. For continuous counter tasks, NI-DAQmx consumes no device resources when the counter is constrained. For finite counter tasks, resource use increases with the frequency regardless of the constraint mode. However, fixed frequency constraints significantly reduce resource usage, and fixed duty cycle constraint marginally reduces it.
	COCounterTimebaseActiveEdge	Specifies whether a timebase cycle is from rising edge to rising edge or from falling edge to falling edge.
	CODataTransferMechanism	Specifies the data transfer mode for the device. For buffered operations, use DMA or USB Bulk. For non-buffered operations, use Polled.
	CODataTransferRequestCondition	Specifies under what condition to transfer data from the buffer to the onboard memory of the device.
	COOutputState	Indicates the current state of the output terminal of the counter.
	COOutputType	Indicates how to define pulses generated on the channel.
	COPulseFrequencyUnits	Specifies the units in which to define pulse frequency.
	COPulseIdleState	Specifies the resting state of the output terminal.
	COPulseTimeUnits	Specifies the units in which to define high and low pulse time.
	CounterOutputEventIdleState	Specifies the initial state of the output terminal of the counter when CounterOutputEventOutputBehavior is Toggle. The terminal enters this state when NI-DAQmx commits the task.
	CounterOutputEventOutputBehavior	Specifies whether the exported Counter Output Event pulses or changes from one state to the other when the counter reaches terminal count.
	CounterOutputEventPulsePolarity	Specifies the polarity of the pulses at the output terminal of the counter when CounterOutputEventOutputBehavior is Pulse. NI-DAQmx ignores this property if CounterOutputEventOutputBehavior is Toggle.
	CouplingTypes	Specifies a set of coupling types a device may support.
	DataActiveEventLevelActiveLevel	Specifies the polarity of the exported Data Active Event.
	DelayFromSampleClockUnits	Specifies the units of DelayFromSampleClock.
	DeviceBusType	Indicates the bus type of the device.
	DIAcquireOn	Specifies on which edge of the sample clock to acquire samples.
	DIDataTransferMechanism	Specifies the data transfer mode for the device.
	DIDataTransferRequestCondition	Specifies under what condition to transfer data from the onboard memory of the device to the buffer.
	DigitalEdgeAdvanceTriggerEdge	Obsolete. (Deprecated) Specifies on which edge of a digital signal to advance to the next entry in a scan list.
	DigitalEdgeArmStartTriggerEdge	Specifies on which edge of a digital signal to arm the task for a Start Trigger.
	DigitalEdgeReferenceTriggerEdge	Specifies on what edge of a digital pulse the Reference Trigger occurs.
	DigitalEdgeStartTriggerEdge	Specifies on which edge of a digital pulse to start acquiring or generating samples.
	DigitalEdgeWatchdogExpirationTriggerEdge	Specifies on which edge of a digital signal to expire the watchdog task.
	DigitalLevelPauseTriggerCondition	Specifies whether the task pauses while the signal is high or low.
	DigitalPatternPauseTriggerCondition	Specifies if the Pause Trigger occurs when the physical channels specified with Source match or differ from the digital pattern specified with Pattern.
	DigitalPatternReferenceTriggerCondition	Specifies whether the Reference Trigger occurs when the physical channels specified with Source match or differ from the digital pattern specified with Pattern.
	DigitalPatternStartTriggerCondition	Specifies whether the Start Trigger occurs when the physical channels specified with Source match or differ from the digital pattern specified with Pattern.
	DigitalPowerUpState	Specifies the power up state to set for the physical channel.
	DigitalPullUpPullDownResistorState	Specifies the pull up pull down level for each physical channel.
	DILogicFamily	Specifies the logic family to use for acquisition. A logic family corresponds to voltage thresholds that are compatible with a group of voltage standards. Refer to the device documentation for information on the logic high and logic low voltages for these logic families.
	DODataTransferMechanism	Specifies the data transfer mode for the device.
	DODataTransferRequestCondition	Specifies under what condition to transfer data from the buffer to the onboard memory of the device.
	DOGenerateOn	Specifies on which edge of the sample clock to generate samples.
	DOLineStatesDoneState	Specifies the state of the lines in a digital output task when the task completes execution.
	DOLineStatesPausedState	Specifies the state of the lines in a digital output task when the task pauses.
	DOLineStatesStartState	Specifies the state of the lines in a digital output task when the task starts.
	DOLogicFamily	Specifies the logic family to use for generation. A logic family corresponds to voltage thresholds that are compatible with a group of voltage standards. Refer to the device documentation for information on the logic high and logic low voltages for these logic families.
	DOOutputDriveType	Specifies the drive type for digital output channels.
	ExcitationIdleOutputBehavior	Specifies whether this channel will disable excitation after the task is uncommitted. Setting this to Zero Volts or Amps disables excitation after task uncommit. Setting this attribute to Maintain Existing Value leaves the excitation on after task uncommit.
	ExportSignal	Specifies the name of the trigger, clock, or event to export.
	FilterResponse	Specifies the digital filter response.
	FilterType	Specifies the digital filter type.
	FirstSampleTimestampTimescale	Specifies the timescale to be used for the first sample timestamp.
	HandshakeEventInterlockedAssertedLevel	Specifies the asserted level of the exported Handshake Event if HandshakeEventOutputBehavior is Interlocked.
	HandshakeEventOutputBehavior	Specifies the output behavior of the Handshake Event.
	HandshakeEventPulsePolarity	Specifies the polarity of the exported Handshake Event if HandshakeEventOutputBehavior is Pulse.
	HandshakeSampleInputDataCondition	Specifies on which edge of the Handshake Trigger an input task latches the data from the peripheral device.
	HandshakeStartCondition	Specifies the point in the handshake cycle that the device is in when the task starts.
	HandshakeTriggerType	Specifies the type of Handshake Trigger to use.
	ImplicitUnderflowBehavior	Specifies the action to take when the onboard memory of the device becomes empty.
	InputCalibrationSource	Specifies the input source selection.
	InterlockedHandshakeTriggerAssertedLevel	Specifies the asserted level of the Handshake Trigger.
	LoggingMode	Specifies whether to enable logging and whether to allow reading data while logging. Log mode allows for the best performance. However, you cannot read data while logging if you specify this mode. If you want to read data while logging, specify Log and Read mode.
	LogicFamily	Specifies the logic family to use for generation and acquisition.
	PauseTriggerLevelActiveLevel	Specifies the active level of the exported Pause Trigger.
	PauseTriggerType	Specifies the type of trigger to use to pause a task.
	PhysicalChannelAccess	Specifies the physical channel access types to include when requesting a list of physical channels.
	PhysicalChannelTypes	Specifies the types of physical channels to include when requesting a list of physical channels.
	PolynomialDirection	Specifies the direction of the conversion the provided polynomial coefficients perform.
	ProductCategory	Indicates the product category of the device. This category corresponds to the category displayed in MAX when creating NI-DAQmx simulated devices.
	PropertyFilterFlags	Specifies a set of property filtering options.
	PropertyFilterType	Specifies the type of property filtering to perform.
	ReadOverwriteMode	Specifies whether to overwrite samples in the buffer that you have not yet read.
	ReadRelativeTo	Specifies the point in the buffer at which to begin a read operation. If you also specify an offset with ReadOffset, the read operation begins at that offset relative to the point you select with this property. The default value is CurrentReadPosition unless you configure a Reference Trigger for the task. If you configure a Reference Trigger, the default value is FirstPretriggerSample.
	ReadWaitMode	Specifies how reading from the task waits for samples to become available.
	ReadyForStartEventLevelActiveLevel	Specifies the polarity of the exported Ready for Start Event.
	ReadyForTransferEventDeassertCondition	Specifies when the ready for transfer event deasserts.
	ReadyForTransferEventLevelActiveLevel	Specifies the active level of the exported Ready for Transfer Event.
	ReallocationPolicy	Specifies the behavior of a memory-optimized read method operation when the operation yields more samples than the current capacity of the buffer can allocate.
	ReferenceTriggerPulsePolarity	Specifies the polarity of the exported Reference Trigger.
	ReferenceTriggerTimestampTimescale	Specifies the reference trigger timestamp timescale.
	ReferenceTriggerType	Specifies the type of trigger to use to mark a reference point for the measurement.
	SampleClockActiveEdge	Specifies on which edge of a clock pulse sampling takes place. This property is useful primarily when the signal you use as the Sample Clock is not a periodic clock.
	SampleClockOutputBehavior	Specifies whether the exported Sample Clock issues a pulse at the beginning of a sample or changes to a high state for the duration of the sample.
	SampleClockOverrunBehavior	Specifies the action to take if Sample Clock edges occur faster than the device can handle them.
	SampleClockPulsePolarity	Specifies the polarity of the exported Sample Clock if SampleClockOutputBehavior is Pulse.
	SampleClockTimebaseActiveEdge	Specifies on which edge to recognize a Sample Clock Timebase pulse. This property is useful primarily when the signal you use as the Sample Clock Timebase is not a periodic clock.
	SampleClockTimingResponseMode	Specifies how the device responds to the sample clock and to triggers.
	SampleClockUnderflowBehavior	Specifies the action to take when the onboard memory of the device becomes empty. In either case, the sample clock does not stop.
	SampleQuantityMode	Specifies if a task acquires or generates a finite number of samples or if it continuously acquires or generates samples.
	SampleTimingType	Specifies the type of sample timing to use for the task.
	SaveOptions	Specifies various options used to save a task, a local or global channel , or a custom scale to Measurement Automation Explorer (MAX).
	ScalePreScaledUnits	Specifies the units of the values that you want to scale.
	ScaleType	Specifies the type of custom scale.
	Scxi1124Range	Specifies the range for the SCXI 1124 calibration values.
	ShuntCalibrationSelect	Specifies the shunt calibration switch(es) to enable.
	ShuntElementLocation	Specifies which resistor to use to calibrate the channel(s).
	ShuntResistorSource	Specifies whether to use internal or external shunt.
	SignalRoutingModifiers	Specifies if the signal routed from the source terminal to the destination terminal is inverted.
	StartTriggerDelayUnits	Specifies the units of Delay.
	StartTriggerPulsePolarity	Specifies the polarity of the exported Start Trigger.
	StartTriggerTimestampTimescale	Specifies the start trigger timestamp timescale.
	StartTriggerType	Specifies the type of trigger to use to start a task.
	SwitchChannelUsage	Obsolete. Specifies how you can use the channel. Using this property acts as a safety mechanism to prevent you from connecting two source channels, for example.
	SwitchPathStatus	Obsolete. Specifies the status of the requested path.
	SwitchRelayPosition	Obsolete. Specifies the position of each specified relay.
	SwitchScanBreakMode	Obsolete. Specifies the action to take between each entry in a scan list.
	SwitchScanRepeatMode	Obsolete. Specifies if the task advances through the scan list multiple times.
	SynchronizationPulseTimescale	Specifies the timescale to be used for timestamps for a sync pulse.
	SynchronizationPulseType	Specifies the type of sync pulse used in the task.
	TaskAction	Specifies how to alter the state of the task.
	TdmsLoggingOperation	Specifies how to open the TDMS file.
	TerminalConfigurationTypes	Specifies a set of terminal configuration types a physical channel may support.
	TerminalTypes	Specifies the types of terminals to include when requesting a list of terminals.
	TimeArmStartTriggerTimescale	Specifies the timescale to be used for timestamps used in an arm start time trigger.
	TimestampEvent	Represents the type of timestamp event.
	TimeStartTriggerTimescale	Specifies the timescale to be used for timestamps used in a time trigger.
	TriggerSynchronizationType	Specifies the role of the device in a synchronized system. Setting this value to Master or Slave enables trigger skew correction. If you enable trigger skew correction, set this property to Master on only one device, and set this property to Slave on the other devices.
	TriggerUsageTypes	Specifies a set of trigger types a device may support.
	WaitForNextSampleClockWaitMode	Specifies how WaitForNextSampleClock waits for the next Sample Clock pulse.
	WatchdogAOExpirationStateType	Specifies the output type of the analog output physical channels when the watchdog task expires.
	WatchdogCOExpirationState	Specifies the state to set the counter output channel terminal when the watchdog task expires.
	WatchdogDOExpirationState	Specifies the state to which to set the digital physical channels when the watchdog task expires. You cannot modify the expiration state of dedicated digital input physical channels.
	WatchdogExpirationTriggerType	Specifies the type of trigger to use to expire a watchdog task.
	WaveformAttributeModes	Specifies the type of information returned from waveform reads.
	WriteRecoveryMode	Specifies how NI-DAQmx attempts to recover after missing a Sample Clock pulse when performing counter writes.
	WriteRegenerationMode	Specifies whether to allow NI-DAQmx to generate the same data multiple times.
	WriteRelativeTo	Specifies the point in the buffer at which to write data. If you also specify an offset with WriteOffset, the write operation begins at that offset relative to this point you select with this property.
	WriteWaitMode	Specifies how writing to the task waits for space to become available in the buffer.