Data Acquisition Toolbox

DefaultChannelValue

Specify the value held by the analog output subsystem

Description

DefaultChannelValue specifies the value to write to the analog output (AO) subsystem when data is finished being output from the engine.

DefaultChannelValue is used only when OutOfDataMode is set to DefaultValue. This property guarantees that a known value is held by the AO subsystem if a run-time error occurs. Note that sound cards do not have an OutOfDataMode property.

Characteristics

Usage	AO, Channel
Access	Read/write
Data type	Double
Read-only when running	Yes

Values

The default value is zero.

Example

Create the analog output object ao and add two channels to it.

• ao = analogoutput('nidaq',1);
  addchannel(ao,0:1);
  

You can configure ao so that when it stops outputting data, a value of 1 volt is held for both channels.

• ao.OutOfDataMode = 'DefaultValue';
  ao.Channel.DefaultChannelValue = 1.0;
  

See Also

Properties

OutOfDataMode

DataMissedFcn

Direction