public: __fastcall boolean AsyncRead( TdOPCItemList aItemList = nil );
public boolean AsyncRead( TdOPCItemList aItemList );
Public Function AsyncRead( aItemList As TdOPCItemList = nil ) As boolean
AsyncRead performs an asynchronous read of the value, quality and timestamp information for all items either in the group or, if it is not nil, in the parameter aItemList.
The values are returned via the OnDataChange event. The result will be True on successful execution, otherwise False. Reading from the physical device is not affected by the Active state of the group or item.
What do you think about this topic? Send feedback!
Copyright © 2001-2014 Kassl GmbH (http://www.kassl.de). All rights reserved.