Abstract: With the development of industrial automation, communication between OLE for Process Control(OPC) applications in heterogeneous platforms becomes a frequent issue in industrial process control area. This paper describes three methods, using EntireX DCOM/Java/XML OPC respectively to develop OPC clients under Linux. OPC client on Linux platform is able to communicate with OPC server on Windows platform, which is a successful implementation of OPC cross-platform communication. Key technologies in each method are discussed and corresponding code is also included with explicit explanation. A comparison is made between all implementations, based on which their further application in industrial environment is evaluated.

Key words: OLE for Process Control(OPC), XML DA protocol, Python, Java, Linux platform

摘要： 随着工业自动化的发展，工控领域中常常会遇到异构平台之间的用于过程控制的OLE(OPC)通信问题。提出3种方法，分别利用EntireX DCOM, Java以及XML OPC，在Linux下开发OPC客户端。使用Linux上的OPC客户端访问Windows平台上的OPC服务器，从而实现OPC的跨平台通信。描述各种方法的关键技术并给出相关代码，并对所有实现方法进行比较，分析它们在工业应用中的前景。

关键词: 用于过程控制的OLE, XML DA协议, Python语言, Java技术, Linux平台

CLC Number: 

• TP311