Use case of DA Client and DA Server connection

Abstract

OPC(OLE(Object Linking & Embedding) for Process Control) is an international standard software interface specification for industrial automation systems. The Data Access specification is constantly updated with three versions now released, DA1.02, DA2.0, DA3.0 (now in draft phase). As basic interfaces are compatible in each version, different version of DA Client and the DA Server are easily connected. This paper describes the use case of DA Client and DA Server connection.