addAnalogInputChannel - Class: daq.Session
Package: daq

Add analog input channel

Syntax

Description

s.addAnalogInputChannel(deviceID, channelID, measurementType) adds a channel on the device represented by deviceID, with the specified channelID, and channel measurement type, represented by measurementType, to the session s. Measurement types are vendor specific.

ch = s.addAnalogInputChannel(deviceID, channelID, measurementType) creates and displays the object ch.

[ch, idx] = s.addAnalogInputChannel(deviceID, channelID, measurementType) creates and displays the object ch, representing the channel that was added and the index, idx, which is an index into the array of the session object's Channels property.

Tips

• Use daq.createSession to create a session object before you use this method.

• To use counter channels, see .

Input Arguments

deviceID	Specify the vendor-defined ID of the device on the CompactDAQ chassis. The specified channel is created for this device. The device ID is the ID of the device that you obtain by calling daq.getDevices.
channelID	Specify the ID of the channel added to the device. You can also add a range of channels. For NI devices, use either a terminal name, like 'ai2', or a numeric equivalent like 2 for the channel ID. Note   Channel ID is the physical location of the channel on the device. The index for this channel displayed in the session indicates this channels position in the session. If you add a channel with channel ID ‘ai2' as the first channel in your session, the session index will be 1.
measurementType	Specify a string that represents a vendor-defined measurement type. Measurement types include: 'Voltage' 'Thermocouple' 'Current' 'Accelerometer' 'RTD' 'Bridge' 'Microphone' 'IEPE'

Output Arguments

ch	Object representing the channel you added.
idx	An index into the array of the session object's Channels property.

Properties

ADCTimingMode	Set channel timing mode
BridgeMode	Specify analog input device bridge mode
Coupling	Specify input coupling mode
Device	Analog and counter channel device
ExcitationCurrent	Voltage of external source of excitation
ExcitationSource	External source of excitation
ExcitationVoltage	Voltage of excitation source
ExternalTriggerTimeout	Indicate if external trigger timed out
ID	Analog and counter channel ID
InputType	Specify analog input hardware channel configuration
MaxSoundPressureLevel	Sound pressure level for microphone channels
MeasurementType	Type counter channel measurement
Name	Specify descriptive name for the channel
NominalBridgeResistance	Resistance of sensor
R0	Specify resistance value
Range	Specify channel measurement range
RTDConfiguration	Specify wiring configuration of RTD device
RTDType	Specify sensor sensitivity
ScansAcquired	Number of scans acquired during operation
Sensitivity	Sensitivity of an analog channel
ShuntLocation	Indicate location of channel's shunt resistor
ShuntResistance	Resistance value of channel's shunt resistor
ThermocoupleType	Select thermocouple type
Units	Specify unit of RTD measurement

Examples

Add an analog input current channel:

s = daq.createSession ('ni')
s.addAnalogInputChannel('cDAQ1Mod3','ai0', 'Current');

Add an analog input thermocouple channel. Specify output arguments to represent the channel object and the index:

s = daq.createSession ('ni')
[ch, idx] = s.addAnalogInputChannel('cDAQ2Mod6', 'ai0', 'Thermocouple')

Add analog input voltage channels 0, 2, and 4:

s = daq.createSession ('ni')
s.addAnalogInputChannel('cDAQ1Mod1',[0 2 4], 'Voltage');

See Also

daq.Session | daq.Session.addAnalogOutputChannel | daq.Session.removeChannel | daq.Session.startBackground | daq.Session.startForeground

How To

• Using the Session-Based Interface

© 1984-2012- The MathWorks, Inc.    -   Site Help   -   Patents   -   Trademarks   -   Privacy Policy   -   Preventing Piracy   -   RSS