NI DAQMX Channel Attributes

Channel Attributes

See how to get and set attributes.

• Analog Input
• Analog Output
• Digital Input
• Digital Output
• Counter Input
• Counter Output
• General Properties
  • DAQmx_ChanType
  • DAQmx_PhysicalChanName
  • DAQmx_ChanDescr
  • DAQmx_ChanIsGlobal
  • DAQmx_Chan_SyncUnlockBehavior

General Properties

DAQmx_ChanType

Data Type:	int32
Description:	Indicates the type of the virtual channel.
Restrictions:	Not Settable

Valid values

DAQmx_Val_AI	10100	Analog input channel.
DAQmx_Val_AO	10102	Analog output channel.
DAQmx_Val_DI	10151	Digital input channel.
DAQmx_Val_DO	10153	Digital output channel.
DAQmx_Val_CI	10131	Counter input channel.
DAQmx_Val_CO	10132	Counter output channel.

You can get this attribute using:   DAQmxGetChanAttribute

DAQmx_PhysicalChanName

Data Type:	char*
Description:	Specifies the name of the physical channel upon which this virtual channel is based.

You can get/set this attribute using:   DAQmxGetChanAttribute   DAQmxSetChanAttribute

DAQmx_ChanDescr

Data Type:	char*
Description:	Specifies a user-defined description for the channel.

You can get/set/reset this attribute using:   DAQmxGetChanAttribute   DAQmxSetChanAttribute   DAQmxResetChanAttribute

DAQmx_ChanIsGlobal

Data Type:	bool32
Description:	Indicates whether the channel is a global channel.
Restrictions:	Not Settable

You can get this attribute using:   DAQmxGetChanAttribute

DAQmx_Chan_SyncUnlockBehavior

Data Type:	int32
Description:	Specifies the action to take if the target loses its synchronization to the grand master.

Valid values

DAQmx_Val_StopTaskAndError	15862	Stop task and return an error.
DAQmx_Val_IgnoreLostSyncLock	16129	Ignore the loss of synchronization and do nothing.

You can get/set/reset this attribute using:   DAQmxGetChanAttribute   DAQmxSetChanAttribute   DAQmxResetChanAttribute