Make copy of OPC data access object
NewObj = copyobj(Obj)
NewObj = copyobj(Obj, ParentObj)
NewObj = copyobj(Obj, ParentObj) makes a copy of the objects in Obj inside the parent object ParentObj. ParentObj must be a valid scalar parent object for Obj. If any objects in Obj cannot be created in ParentObj, a warning will be generated.
A copied toolbox object contains new versions of all children, their children, and any parents that are required to construct that object. A copied object is different from its parent object in the following ways:
The values of read-only properties will not be copied to the new object. For example, if an object is saved with a Status property value of 'connected', the object will be recreated with a Status property value of 'disconnected' (the default value). You can use propinfo to determine if a property is read-only. Specifically, a connected opcda object is copied in the disconnected state, and a copy of a logging dagroup object is not reset to the logging state.
A copied dagroup object that has records in memory from a logging session is copied without those records.
OPC HDA objects do not support copyobj.
Create a connected Data Access client with a group containing an item:
da1 = opcda('localhost', 'Matrikon.OPC.Simulation'); connect(da1); grp1 = addgroup(da1, 'CopyobjEx'); itm1 = additem(grp1, 'Random.Real8');
Copy the client object. This also copies the group and item objects.
da2 = copyobj(da1); grp2 = da2.Group
Change the first group's name, and note that the second group's name is unchanged:
grp1.Name = 'NewGroupName'; grp2.Name