addCounterOutputChannel - Class: daq.Session
Package: daq

Add counter output channel

Syntax

Description

s.addCounterOutputChannel(deviceID, channelID, measurementType) adds a counter output channel on the device represented by deviceID, with the specified channelID, and channel measurement type, defined by measurementType, on the session object, s. Measurement types are vendor specific.

ch = s.addCounterOutputChannel(deviceID, channelID, measurementType) returns the object ch, representing the channel that was added.

[ch, idx] = s.addCounterOutputChannel(deviceID, channelID, measurementType) returns 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.

Input Arguments

deviceID	Specify the vendor-defined ID of the device. 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 'ctr2', or a numeric equivalent like 2, for the channel ID.
measurementType	Specify a string that represents a vendor-defined measurement type. A valid output measurement type is 'PulseGeneration'.

Output Arguments

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

Properties

Device	Analog and counter channel device
DutyCycle	Duty cycle of counter output channel
Frequency	Frequency of generated pulses on counter output channel
ID	Analog and counter channel ID
IdleState	Default state of counter output channel
InitialDelay	Delay until output channel generates pulses
MeasurementType	Type counter channel measurement
Name	Specify descriptive name for the channel

Examples

Add an counter output PulseGeneration channel:

s = daq.createSession ('ni')
s.addCounterOutputChannel('cDAQ1Mod3','ctr0','PulseGeneration')

Add two counter output PulseGeneration channels:

s = daq.createSession ('ni')
s.addCounterOutputChannel('cDAQ1Mod3',0:1,'PulseGeneration')

See Also

daq.Session | daq.Session.addCounterInputChannel | daq.Session.removeChannel | daq.session.startBackground

How To

• Using the Session-Based Interface
• Generating Data on a Counter Channel

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