propinfo

Property information for OPC objects

Syntax

Out = propinfo(Obj)
Out = propinfo(Obj,'PropName')


Description

Out = propinfo(Obj) returns a structure array with field names given by the property names for Obj. Each property name in the output contains a structure with the fields shown below.

Field Name	Description
Type	Data type of the property. Possible values are 'any', 'callback', 'double', and 'string'.
Constraint	Type of constraint on the property value. Possible values are 'bounded', 'callback', 'enum', and 'none'.
ConstraintValue	List of valid character vector values or a range of valid values
DefaultValue	Default value for the property
ReadOnly	Condition under which a property is read-only: 'always' — Property cannot be configured. 'whileConnected' — Property cannot be configured while Status is set to 'connected'. 'whileLogging' — Property cannot be configured while Logging is set to 'on'. 'never' — Property can be configured at any time.

Out = propinfo(Obj,'PropName') returns a structure array, Out, for the property specified by PropName. If PropName is a cell array of character vectors or an array of strings, then the function returns a cell array of structures for each property.

Examples

da = opcda('localhost','Dummy.Server'); 
allInfo = propinfo(da)
serverIDInfo = propinfo(da,'ServerID')

Version History

Introduced before R2006a