Chapter 7
Property Reference

The Property Description Format

• The property name
• A description of the property
• The property characteristics, including:
  • Device Objects - which device objects the property is associated with

  The device objects supported by the Data Acquisition Toolbox include analog input (AI), analog output (AO), and digital I/O (DIO) objects.

  • Class - whether it is a common property, or a channel or line property

  Common properties apply to all channels or lines contained by the device object.

  Channel (line) properties can be set on a per-channel (per-line) basis.

  • Access - whether the property is read/write or read-only

  Read/write property values can be returned with the get command, and configured with the set command.

  Read-only property values can be returned with the get command, but cannot be configured with the set command.

  • Data Type - the property data type
  • Modify while Running - whether a property value can be set while the device object is running
• Valid property values including the default value

When property values are given by an enumerated list, the default value is usually indicated by "{ }". If a default value is not indicated, then it is determined by the hardware. Default values for some properties are calculated by the data acquisition engine, while others are determined by the hardware driver.

If there are device-specific enumerated values, they are listed separately.

• An example using the property
• Related properties and functions

Functions appear in lower case, while properties appear in mixed case.