Design and Development of the Air Conditioning System by Using OPC UA Specifications and Modbus Protocol

This paper focuses on a technological innovation that has been applied in many countries and still has continuously been researched to enhance its effectiveness - OPC (Openness, Productivity, and Connectivity) Unified Architecture. OPC Unified Architecture (OPC UA) is new specification used for the connection of accessories, based on open form and independent of any technological system. OPC UA gains access to data base and events following its real time or are stored through safe, trustworthy and totally separate connection. The research presented in this paper attempts to introduce the development of an OPC UA specifications and Modbus protocol used for monitoring and controlling air conditioners (i.e., devices). In addition, this also reduces the development time and cost for such applications. This paper has been explained the established to comply with the requirements set forth. Its scope includes the solution to smart monitoring system of air conditioning equipment in compliance with a general industrial standard and a well-known protocol. This solution sets the first foundation for developing a software system based on OPC UA specifications for industrial use.