• Title/Summary/Keyword: PLC

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Implementation of Zigbee/PLC Gateway System for U-Health Care (유비쿼터스 헬스케어를 위한 Zigbee/PLC 게이트웨이 시스템 구현)

  • Kim, Sung-Yun;Kang, Kyung-Il;Kweon, Min-Su;Rhee, Young-Chul
    • The Journal of the Korea institute of electronic communication sciences
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    • v.5 no.3
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    • pp.332-338
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    • 2010
  • In this paper, Zigbee/PLC gateway system is designed for Ubiquitous health care. A protocol conversion algorithm for smooth information exchange between Zigbee and PLC communication has been implemented on the gatway. If a moving object is detected by wireless sensor, the data is transmitted to gateway. Zigbee/PLC gateway analyzes received data and transmits to Power Line Communication for real-time monitoring. Implemented system is can support elder who lives alone activity analysis, crime prevention system, Home network service.

A Shelter Guidance System using the PLC Communication (PLC 통신을 이용한 피난구 유도장치 시스템)

  • Lee, Chang-Young;Lee, Kyu-Yun;Lee, Hyun-Kwan;Kim, In-Kook;Eom, Ki-Hwan
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • v.9 no.1
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    • pp.583-586
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    • 2005
  • We propose a shelter guidance system using the PLC communication to resolve that a conventional shelter guidance light for underground space has problems. The proposed shelter guidance system is composed of a main control part, a PLC remote control part, a charging part, a sound generation part, a display part, an alarm part and a smoke sensing part.. The efficacy of the proposed system is verified by means of experimental. Experimental results are presented that show the effectiveness and the improvement of noise.

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The PLC Controlling on Web Browser (Web Browser를 이용한 PLC 제어)

  • 김지은;박춘명;이강현
    • Proceedings of the IEEK Conference
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    • 2001.06c
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    • pp.105-108
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    • 2001
  • In this paper, "The PLC Controlling on Web Browser" is designed and implemented to remote control and to monitor FA system. Protocol bidirectional communication with PLC is written and sotted. Then Administration system sets Web server and JAVA Sevelet Program. The client system located at the monitoring Web browser are a JAVA Sevelet base system, and sends some commands to the server system which guards and controls the PLC system. The commands are delivered to the server system and the driver software exists in the server controls the PLC system directly.

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PLC개발

  • 안재봉
    • 전기의세계
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    • v.38 no.12
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    • pp.37-40
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    • 1989
  • 최근 국내기업들의 공장자동화가 활발히 추진되어 가고 있는 추세에 따라 PLC의 수요가 대폭적으로 증가하고 있으며 이에따라 각 업체들의 PLC의 생산을 서두르고 있으며 시설능력도 확충하는 등 수요에 대비하고 있는 것은 매우 고무적인 일이라 할 수 있다. 그러나 자체모델 및 자체 설계능력을 보유하기위한 PLC 연구개발활동은 극히 미약하고 PLC의 국내 기술수준은 극히 일부기업만 제외하고는 아직 초보단계에 머물러 있다. 한편 원화 절상 및 고임금화에 따른 국제 경쟁력 약화로 PLC의 국내 수요가 대폭적으로 상승될 것이 예상되므로 수입제품과 경쟁하여 수입대체 효과를 거두는 동시에 공장자동화를 활성화 시키기 위해서는 기술수준과 기술개발능력을 확충하는 것이 매우 중요하다.

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PLC Manager for Incompatible PLCs in a Cell Controller (비호환 기종 PLC들의 통합제어를 위한 PLC매니저 설계)

  • Park, Won-Yil
    • The Transactions of the Korean Institute of Electrical Engineers
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    • v.43 no.4
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    • pp.658-665
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    • 1994
  • CIM is generally considered as a solution for total automation of a manufacturing system. In a CIM system, Flexible Manufacturing System(FMS) is linked colsely to the actual manufacturing line. This study will examine the strategy of integrating incompatible FA equipments, expecially PLCs (Programable Logic Controllers). PLC Manager is proposed as a model for integrating PLC algorithms, whose primary tasks are to communicate line-field data with PLCs and cell controller. To operate it, a PLC script language is designed and implemented.

A Study on the Implementation of PLC Program for Flowing Type Steam Boiler Control (관류형 스팀보일러 제어를 위한 PLC PROGRAM 구현에 관한 연구)

  • Cho, Hyeon-Seob;Kim, Jong-Ok;Kim, Hee-Suk
    • Proceedings of the KIEE Conference
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    • 2001.07d
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    • pp.2439-2441
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    • 2001
  • In this paper, PLC program for flowing type steam boiler control is presented. The function of the implementation are flowing type steam boiler, PLC control, interpretation of PLC command, and temperature scheme. The flowing type steam boiler approach is based on master-slave control concept. To show validity of the developed PLC program, severial experiments are illustrated.

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Expression of Phospholipase C Isozymes in Human Lung Cancer Tissues (인체 폐암조직에서 Phospholipase C 동위효소의 발현양상)

  • Hwang, Sung-Chul;Mah, Kyung-Ae;Choi, So-Yeon;Oh, Yoon-Jung;Choi, Young-In;Kim, Deog-Ki;Lee, Hyung-Noh;Choi, Young-Hwa;Park, Kwang-Ju;Lee, Yi-Hyeong;Lee, Kyi-Beom;Ha, Mahn-Joon;Bae, Yoon-Su
    • Tuberculosis and Respiratory Diseases
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    • v.49 no.3
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    • pp.310-322
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    • 2000
  • Background : Phospholipase C(PLC) plays an important role in cellular signal transduction and is thought to be critical in cellular growth, differentiation and transformation of certain malignancies. Two second messengers produced from the enzymatic action of PLC are diacylglycerol (DAG) and inositol 1, 4, 5-trisphosphate (IP3). These two second messengers are important in down stream signal activation of protein kinase C and intracellular calcium elevation. In addition, functional domains of the PLC isozymes, such as Src homology 2 (SH2) domain, Src homology 3 (SH3) domain, and pleckstrin homology (PH) domain play crucial roles in protein translocation, lipid membrane modificailon and intracellular memrane trafficking which occur during various mitogenic processes. We have previously reported the presence of PLC-${\gamma}1$, ${\gamma}2$, ${\beta}1$, ${\beta}3$, and ${\delta}1$ isozymes in normal human lung tissue and tyrosine-kinase-independent activation of phospholipase C-${\gamma}$ isozymes by tau protein and AHNAK. We had also found that the expression of AHNAK protein was markedly increased in various mstologic types of lung can∞r tissues as compared to the normallungs. However, the report concerning expression of various PLC isozymes in lung canærs and other lung diseases is lacking. Therefore, in this study we examined the expression of PLC isozymes in the paired surgical specimens taken from lung cancer patients. Methods : Surgically resected lung cancer tissue samples taken from thirty seven patients and their paired normal control lungs from the same patients, The expression of various PLC isozymes were studied. Western blot analysis of the tissue extracts for the PLC isozymes and immunohistochemistry was performed on typical samples for localization of the isozyme. Results : In 16 of 18 squamous cell carcinomas, the expression of PLC-${\gamma}1$ was increased. PLC-${\gamma}1$ was also found to be increased in all of 15 adenocarcinoma patients. In most of the non-small cell lung cancer tissues we had examined, expression of PLC-${\delta}1$ was decreased. However, the expression of PLC-${\delta}1$ was markedly increased in 3 adenocarcinomas and 3 squamous carcinomas. Although the numbers were small, in all 4 cases of small cell lung cancer tissues, the expression of PLC-${\delta}1$ was nearly absent. Conclusion : We found increased expression of PLC-${\gamma}1$ isozyme in lung cancer tissues. Results of this study, taken together with our earlier findings of AHNAK protein-a putative PLD-${\gamma}$, activator-over-expression, and the changes observed in PLC-${\delta}1$ in primary human lung cancers may provide a possible insight into the derranged calcium-inositol signaling pathways leading to the lung malignancies.

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Study on recombinant expression of Phospholipase C gene (plc) in methylotrophic yeast Pichia pastoris and its properties

  • Seo, Kook-Hwa;Rhee, Jong-Il
    • 한국생물공학회:학술대회논문집
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    • 2003.10a
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    • pp.191-194
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    • 2003
  • The phospholipase C (PLC) hydrolyzes the polar head groups such as phosphocholine or phosphoethanolamine residues esterified at the sn-3 position of phospholipids. Pichia pastoris can utilize methanol as a carbon source and produce recombinant proteins under the control of the strong, tightly-regulated alcohol oxidase (AOX) promoter. In this study, we developed recombinant P. pastoris system for PLC expression and analyzed PLC activity.

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Methylotrophic yeast Pichia pastoris를 이용한 재조합 phospholipase C (PLC) 생산 및 특성 연구

  • Seo, Guk-Hwa;Jeong, Sang-Yun;Lee, Jong-Il;Bornscheuer, Uwe T.
    • 한국생물공학회:학술대회논문집
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    • 2003.04a
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    • pp.233-235
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    • 2003
  • The phospholipase C (PLC) hydrolyzes the polar head groups such as phosphocholine or phosphoethanolamine residues esterified at the sn-3 position of phospholipids. Pichia pastoris can utilize methanol as a carbon source and produce recombinant proteins under the control of the strong, tightly-regulated alcohol oxidase (AOX) promoter. In this study, we developed recombinant P. pastoris system for the high productivity of PLC and analyzed PLC activity.

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Present status of KEPCO's R&D of the PLC technology and AMI projects (저압원격검침시스템 구축현황 및 기술동향)

  • Yi, Sue-Muk;Jung, Kang-Sik;Lim, Ki-Sik;Kim, Myong-Ho
    • Proceedings of the KIEE Conference
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    • 2011.07a
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    • pp.488-489
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    • 2011
  • This technical reports describes KEPCO's PLC technology and PLC AMI projects. KEPCO has developed PLC and PLC convergence technology. KEPCO's BPL(Broadband over PLC) standard was selected as an IEC International Standard (IEC 12139-1) in 2009. KEPCO conducted a project installing 550,000 smart meters to residential customers finishing in 2010. KEPCO will carry out a PLC-AMI project around country until 2020, as well as many pilot projects to test its PLC convergence technology.

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