• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2022.05a
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• pp.522-523
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• 2022

In this paper, we design a gateway protocol architecture for building an IoT-based smart factory. A smart factory system consists of several terminal devices, gateways and servers, and connects them through a wireless network. The terminal device collects information from various sensors and transmits the information to the server through the gateway. The terminal device controls the actuator by receiving a control signal according to a control algorithm of the server or by manual operation. Therefore, the gateway system connects Wi-SUN, a wireless smart utility network, and the Internet, serves as a Wi-SUN coordinator, and is equipped with Modbus-TCP to interwork with SCADA.

• Journal of IKEEE
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• v.19 no.3
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• pp.319-326
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• 2015

This paper proposes method about development of conversion software for controller without OPC stack to communicate with OPC DA client. The proposed method is composed of development of OPC server based on OPC DA standard protocol, development of GUI application can be checked the OPC tag and point informations, development of conversion module to convert from OPC protocol to open standard protocol. In the stage of development of OPC server based on OPC DA standard protocol, we develope server in the pc to transmit and receive datum through OPC DA protocol with OPC DA client. In the stage of evelopment of GUI application can be checked the OPC tag and point informations, run the OPC DA server and register to window system registry and check OPC tags, points, transmitting and receiving of data from serial communication. In the stage of development of conversion module to convert from OPC protocol to open standard protocol, convert from OPC tag data which has received from OPC DA client to protocol can be communicated with industrial controller using open standard protocol so that support to transmit and receive data. To evaluate the efficiency of the proposed software, we connected OPC DA server software and OPC client, and 5 sample industrial controller which use open standard protocol, as a result we got 96.98% average communication succeeding rate among entire transmitting and receiving packets. We also confirmed that successfully communicated between industrial building controller which uses modbus protocol and industrial OPC DA client using OPC DA conversion software proposed by this dissertation.

• Proceedings of the KIEE Conference
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• 2007.04a
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• pp.128-130
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• 2007

The research degined model which was integrated Cache technical for improvement of modebus protocol. The mode bus it leads and it does not solve in existing to shorten the tank data computing time. It desigine the algorithm which discriminates the shift time of the petrochemistry process tank m following. It is an objective of dissertation.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.21 no.11
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• pp.2139-2144
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• 2017

In case of communication method and protocol applied to the industrial field, various kinds and methods are applied to the field according to the environment and hardware configuration specifications. In order to develop and construct an industrial monitoring system, the development of the equipment is carried out through hardware system analysis and communication protocol analysis each time, so that a lot of development costs and time are being entered. In this paper, we proposed a programmable protocol conversion algorithm to support the integrated monitoring of industrial equipment using various protocols. This method can extract the necessary data from the data transmitted by serial communication, NMEA, CAN, Modbus communication method and transmit it to Ethernet. We implemented a communication gateway module that supports various communication methods, and experimented with data conversion and transmission.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.1
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• pp.151-158
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• 2010

The industrial foundation of the inside and outside of a country has brought significant damages due to attacks from hackers. Especially, if the national primary core infrastructures(like electric power, dam, railroad, atomic energy, etc.) has been significantly damaged, it can be directly linked not only to economic problems but also to people's lives. These national primary core infrastructures usually constitute SCADA system using Modbus RS486 communication. Because of this characteristic, SCADA system has RTU master and slave linked to RJ11 cables to directly pass commands. RJ11 is possible in data spoofing using physical connection because the transmission range of RJ11 has a wide bandwidth(almost 1km). Hence, this paper designed an idle-time measurement system for SCADA system for emerging security improvement in the national primary core infrastructures.

• Proceedings of the KIEE Conference
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• 2006.07d
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• pp.2103-2104
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• 2006

빌딩이 지능화 되어감에 따라 많은 제어 시스템이 생겨나게 되었다. 그리고 이들을 통합하여 연동 서비스를 제공하기 위한 노력들이 이루어지고 있다. 그동안 빌딩에 도입된 자동화 및 제어 시스템은 공급업체도 다양할 뿐만 아니라 업체별로 시스템 통신 방식도 상이하기 때문에 공급업체에 의해 종속되는 문제점을 가지고 있었다. 이와 같은 문제를 인식하고 개방형 표준 프로토콜을 사용하려는 노력들이 있었고, 현재는 BACnet, LonWorks, Modbus 등의 개방형 프로토콜을 각 설비의 특성에 맞게 혼용하고 있다. 그러나 각 설비별로 데이터 포맷과 통신 방법이 틀리기 때문에 완벽한 통합과 연동 서비스는 이루어 지지 못하고 있다. 이에 본 논문에서는 빌딩 시스템간의 데이터 공유, 빌딩 어플리케이션과 다른 비즈니스 어플리케이션간의 데이터 공유 및 통신이 가능하도록 XML 웹 서비스를 제안하고 구현하였다.

• Electronics and Telecommunications Trends
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• v.28 no.6
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• pp.133-140
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• 2013

기존의 센서 접속 기술은 그 분야에 띠라 다양한 표준과 규격이 존재하였다. 빌딩 자동제어 및 제어 네트워크용으로는 BACnet이 있으며, 공장제어 및 계측제어를 위한 Modbus 등이 다양한 프로토콜이 존재한다. 최근 M2M(Machine-to-Machine) 및 IoT(Internet of Things), WoT(Web of Things) 시대로 접어 들음에 따라 센서 및 각종 디바이스 간에 상호 통신할 수 있는 공통 프로토콜이 필요하게 되었다. IoT 프로토콜로 IEIF(Internet Engineering Task Force) CoAP(Constrained Application Protocol) 프로토콜이 핵심 역할을 하고 있으며, 차세대 센서 접속 프로토콜로 IETF CoAP이 많이 사용될 것으로 예상된다. 본고에서는 IETF CoAP 표준화 동향 및 규격에 대해 살펴본다.

• Journal of Institute of Control, Robotics and Systems
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• v.10 no.4
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• pp.334-340
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• 2004

In this paper, a Web-based management system for the building network is described. A multi-protocol converter based on SoC and embedded Linux is designed. The open source licensing, reliability, and broad hardware support are key reasons for use of embedded Linux in embedded industry. The multi-protocol converter integrates control network of RS-485 and LonWorks devices through TCP/IP protocol for a client with Java applet. The system consists of three-tier architecture, such as a client, a server that is performed on a multi-protocol converter, and control devices. The developed system includes the inverter motor control system with modbus protocol for the RS-485 network. The experiment results show that the multi-protocol converter using embedded Linux is a flexible and effective way to builda Web -based monitoring and control system.

• Proceedings of the KIEE Conference
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• 2008.07a
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• pp.1706-1711
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• 2008

This paper proposes a new Web based-control concept & design method and implementation of LonWorks network system for a large scale renewable energy energy control and monitoring system in building. The Experimental LonWorks network system using LonWorks/Ethernet(Web) server is designed and fabricated. This article addresses issues in architecture of LonWorks/Ethernet sever, embedded processors architecture for converting LonTalks protocol to Modbus protocol and software, and Internet technologies. It is also verified that the multi-induction motor control and monitoring system using LonWorks/Ethernet server have available, interoperable, reliable performance characteristics from the experimental results, Especially, The seamless integration of TCP/IP networks with control networks allows access to any control point from anywhere. Thus, the results provide a available technical data for remote distributed control system of industrial and buildings field.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.65 no.5
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• pp.868-872
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• 2016

This paper presents the design of a BLDC motor driver applicable to various valve control systems using smart devices. BLDC motors are relatively small in size and have better performance than other motors. They help in reducing maintenance cost, installation costs and power consumption in plant facilities. The proposed driver is specially designed for BLDC motors using Smart Communication Platform. It adds smart features in the valve control system using BLDC motors such as multi-management, control, networking and monitoring in real time with the help of smart devices.