조명제어용 내셔널 프로토콜을 위한 모드버스 프로토콜 변환기 설계

Abstract

ABSTRACT

Design of Modbus Protocol Converter for National Protocol in Lighting Control

Seol, IL-Su Advisor : Prof. Choi, Dong-You, Ph.D. Dept. of Info. & Comm. Eng., Graduate School of Chosun University

Universal protocol converter is converting from lighting protocol to universal protocol (modbus) to be accessed for building automation system main control software with lighting controller. Lighting controller is using its own protocol to control light in the building of factory, but it cannot be interfaced with the other system in the control room. Therefore, one more pc or server is needed to monitor and control lights using displays and simple graphic in the monitor, in order to use on more system or pc, protocol converter has to be developed to communicate non-universal protocol controller and universal one. Protocol converter is converting from National protocol to Modbus protocol which is very famous for the BAS (Building Automation System) protocol. Nowadays, most of building automation solutions adopt that protocol to interface with BMS (Building Management System), but some of the controller e,g Lighting System is not using their own protocol. This converter is made of Atmega128 processor, and it has some peripherals which are RS232, RS485 monitored LED and couple of switches. Even if lighting system is using RS232 or RS485 cable to communicate with its own server, this converter can convert from both of them, because I installed the switch to change the port of 232 or 485. As a result this converter could be applied for the building automation system, and the other site where wants to communicate with non-universal protocol controller and universal protocol controller.