Property Names and Property Values
Property names and property values allow you to define and evaluate the behavior of your data acquisition application. You define acquisition behavior by assigning values to properties, and you can evaluate your configuration by displaying values for properties.
Data Acquisition Toolbox properties are divided into two main categories: common properties and channel/line properties. Common properties apply to every channel or line contained by a device object, while channel/line properties can be configured for individual channels or lines. The relationship between an analog input object, the channels it contains, and their properties is shown below.
Property values apply uniquely to a particular instance of a device object; setting a value for one object, channel, or line does not change this value for other device objects of the same type. If an invalid property value is specified, an error message is returned along with the invalid property name. All property values are verified that they are within the range of valid values when they are set. An error is returned if the value is out of range during a set.
Both common properties and channel/line properties can be subdivided into base properties and device-specific properties as shown below.
Common, channel/line, base, and device-specific properties are discussed below. For a complete description of all properties, refer to Chapter 7, "Property Reference."
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