Standalone OPC UA Wrapper for Industrial Monitoring and Control Systems

Standalone OPC UA Wrapper for Industrial Monitoring and Control Systems

Blog Article

OPC unified architecture (UA), a communication standard for the manufacturing industry, enables exchanging control and management data among distributed entities in industrial automation systems.OPC UA wrapper is a migration strategy that provides UA clients with seamless access to legacy servers having OPC classic interfaces.This paper presents the design of a standalone OPC UA wrapper and discusses its performance through extensive experiments using a prototype implementation.The wrapper consists of two main components, i.e.

, UA server and classic client, which communicate with each other via shared memory and semaphore.One important feature of the design is that it employs a distributed savingszoo.com component object model runtime library implemented in Java for platform independence.This makes it possible to build a cost-competitive wrapper system by using commercial off-the-shelf non-Windows solutions with low-cost microprocessors.Another key feature is the event-driven update interface between the UA and classic components, which we propose as an alternative to the sampling-based mechanism yoowe bacanora for the reduced delay.Through experiments using workloads from an industrial monitoring system, we present a systematic approach of identifying the system parameters having a direct impact on the wrapper performance and eventually tuning them such that the read and subscription services of OPC UA exhibit the best performance.