Thematische Bibliographien / Modbus TCP communication protocol

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Auswahl der wissenschaftlichen Literatur zum Thema „Modbus TCP communication protocol“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 1. Februar 2022

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Zeitschriftenartikel zum Thema "Modbus TCP communication protocol"

Jaloudi, Samer. „Communication Protocols of an Industrial Internet of Things Environment: A Comparative Study“. Future Internet 11, Nr. 3 (07.03.2019): 66. http://dx.doi.org/10.3390/fi11030066.

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Most industrial and SCADA-like (supervisory control and data acquisition) systems use proprietary communication protocols, and hence interoperability is not fulfilled. However, the MODBUS TCP is an open de facto standard, and is used for some automation and telecontrol systems. It is based on a polling mechanism and follows the synchronous request–response pattern, as opposed to the asynchronous publish–subscribe pattern. In this study, polling-based and event-based protocols are investigated to realize an open and interoperable Industrial Internet of Things (IIoT) environment. Many Internet of Things (IoT) protocols are introduced and compared, and the message queuing telemetry transport (MQTT) is chosen as the event-based, publish–subscribe protocol. The study shows that MODBUS defines an optimized message structure in the application layer, which is dedicated to industrial applications. In addition, it shows that an event-oriented IoT protocol complements the MODBUS TCP but cannot replace it. Therefore, two scenarios are proposed to build the IIoT environment. The first scenario is to consider the MODBUS TCP as an IoT protocol, and build the environment using the MODBUS TCP on a standalone basis. The second scenario is to use MQTT in conjunction with the MODBUS TCP. The first scenario is efficient and complies with most industrial applications where the request–response pattern is needed only. If the publish–subscribe pattern is needed, the MQTT in the second scenario complements the MODBUS TCP and eliminates the need for a gateway; however, MQTT lacks interoperability. To maintain a homogeneous message structure for the entire environment, industrial data are organized using the structure of MODBUS messages, formatted in the UTF-8, and then transferred in the payload of an MQTT publish message. The open and interoperable environment can be used for Internet SCADA, Internet-based monitoring, and industrial control systems.

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Li, Yan Xia, Mo Li Zhang, Dan Mei Niu und Xiao Ling Zhang. „Design and Implementation of Embedded System Based on Modbus TCP/IP“. Advanced Materials Research 532-533 (Juni 2012): 667–71. http://dx.doi.org/10.4028/www.scientific.net/amr.532-533.667.

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It is the requirements of limited resources and realtime in embedded system. Design of network communication system based on embedded system is hard. In this paper, we propose the architecture of embedded network using Modbus TCP/IP protocol, analyze the composition of Modbus TCP/IP protocol. It is that Modbus protocol information can be made in the TCP/IP protocol of the Internet transmission, and thus extend the application of Modbus protocol. The network communication system is designed and implemented on the ARM platform using non-blanking socket in Linux. The system is available, stable and worthy of popularization.

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Shang, Wen Li, Sheng Shan Zhang und Ming Wan. „Modbus/TCP Communication Anomaly Detection Based on PSO-SVM“. Applied Mechanics and Materials 490-491 (Januar 2014): 1745–53. http://dx.doi.org/10.4028/www.scientific.net/amm.490-491.1745.

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Industrial firewall and intrusion detection system based on Modbus TCP protocol analysis and whitelist policy cannot effectively identify attacks on Modbus controller which exactly take advantage of the configured rules. An Industrial control systems simulation environment is established and a data preprocessing method for Modbus TCP traffic captured is designed to meet the need of anomaly detection module. Furthermore a Modbus function code sequence anomaly detection model based on SVM optimized by PSO method is designed. And the model can effectively identify abnormal Modbus TCP traffic, according to frequency of different short mode sequences in a Modbus code sequence.

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Bednarek, Marcin, Tadeusz Dąbrowski und Wiktor Olchowik. „Selected Practical Aspects of Communication Diagnosis in the Industrial Network“. Journal of KONBiN 49, Nr. 1 (01.03.2019): 383–404. http://dx.doi.org/10.2478/jok-2019-0020.

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Abstract Industrial networks combine elements of distributed control systems: process stations, operator stations and engineering stations. DCS stations often communicate using a dedicated, closed communication protocol. The industrial networks can be also used to manage communication between the stations of various systems, separate in terms of configuration. The process station communicates here with an external operator station, that is the SCADA system. For this purpose, the process stations and the SCADA systems can also communicate according to standard communication protocols, e.g. Modbus TCP. The paper examines the selected variants of diagnosing the communication status between the process station and the external operator station conducted according to the Modbus TCP protocol. The practical methods of finding the communication system unfitness causes are discussed.

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Chen Tiejun, und Yang Shaoming. „Implementation of the Modbus/TCP Protocol on the STM32“. Journal of Convergence Information Technology 8, Nr. 2 (31.01.2013): 87–93. http://dx.doi.org/10.4156/jcit.vol8.issue2.11.

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Meng, Fanwen, Yuxiang Zhang und Dongkai Yang. „Design of Communication Among Vision System, PLC and Industrial Robot based on Modbus-TCP protocol“. Journal of Physics: Conference Series 1288 (August 2019): 012083. http://dx.doi.org/10.1088/1742-6596/1288/1/012083.

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Tidrea, Alexandra, Adrian Korodi und Ioan Silea. „Cryptographic Considerations for Automation and SCADA Systems Using Trusted Platform Modules“. Sensors 19, Nr. 19 (27.09.2019): 4191. http://dx.doi.org/10.3390/s19194191.

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The increased number of cyber threats against the Supervisory Control and Data Acquisition (SCADA) and automation systems in the Industrial-Internet-of-Things (IIoT) and Industry 4.0 era has raised concerns in respect to the importance of securing critical infrastructures and manufacturing plants. The evolution towards interconnection and interoperability has expanded the vulnerabilities of these systems, especially in the context of the widely spread legacy standard protocols, by exposing the data to the outside network. After gaining access to the system data by launching a variety of attacks, an intruder can cause severe damage to the industrial process in place. Hence, this paper attempts to respond to the security issue caused by legacy structures using insecure communication protocols (e.g., Modbus TCP, DNP3, S7), presenting a different perspective focused on the capabilities of a trusted platform module (TPM). Furthermore, the intent is to assure the authenticity of the data transmitted between two entities on the same (horizontal interoperation) or different (vertical interoperation) hierarchical levels communicating through Modbus TCP protocol based on functionalities obtained by integrating trusted platform modules. From the experimental results perspective, the paper aims to show the advantages of integrating TPMs in automation/SCADA systems in terms of security. Two methods are proposed in order to assure the authenticity of the messages which are transmitted, respectively the study presents the measurements related to the increased time latency introduced due to the proposed concept.

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Wu, Hua Zhu, Le Jun Zhang und Chun Guang Zhang. „Realization of Ethernet and RS485 Communication Gateway Based on μC/OS-II System“. Applied Mechanics and Materials 39 (November 2010): 416–20. http://dx.doi.org/10.4028/www.scientific.net/amm.39.416.

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In order to realize the interconnection between RS485 interface equipments and industrial Ethernet to satisfy the information integration needs from enterprise equipment control layer to management layer, the paper introduces a realizing method of embedded Ethernet gateway based on μC/OS-II system. This method use LM3S8962 micro-controller which integrate Ethernet controller as control core to finish the conversion between Modbus and TCP/IP protocol by opening up a data buffer, and to enhance the speed of data communication. Compared with other embedded gateway it has simple hardware structure, easy software and strong anti-interference, etc.

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Mzrieb, Hossam. „Performance Evaluation of UDP, DCCP and TCP in Congested Wired Networks“. International Journal of Information Systems and Social Change 10, Nr. 3 (Juli 2019): 24–32. http://dx.doi.org/10.4018/ijissc.2019070103.

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Communication through the internet is one of the dominant methods of exchanging information. TCP and UDP are the transport layer protocols responsible for transit of nearly all Internet communications. Due to the growth of real-time audio and video applications, UDP is being used more frequently as a transport protocol, but unlike TCP, UDP has no mechanism for congestion control leading to wasted bandwidth and poor performance, so the DCCP protocol has appeared as a replacement for UDP. In this article, the author performs some simulations using NS2 for Drop Tail and RED queuing models to evaluate the performance of TCP, UDP, DCCP CCID2, and DCCP CCID3 protocols in congested wired networks. The performance metrics used are throughput, end to end delay, number of sent and lost packets. The obtained results show that the DCCP CCID2 performs the best throughput with the minimum of delay as compared to UDP, TCP, and DCCP CCID3.

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Fang, Xiao, Lin Chen und Hong Zhi Yin. „The Measurement and Control System of Agricultural Greenhouse Based on Network“. Advanced Materials Research 926-930 (Mai 2014): 1488–92. http://dx.doi.org/10.4028/www.scientific.net/amr.926-930.1488.

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A network measurement and control system based on STM32 is designed for the control of greenhouse temperature, humidity, carbon dioxide concentration, etc. ModbusRTU serial bus is used for managing the greenhouse environment instrumentation network and signal acquisition. The remote control of greenhouse is achieved by LWIP Ethernet and Modbus/TCP communication protocol, and the network control of multispan greenhouse is realized by them. MCGS(Monitorand Control Generated System) is used for the design of human machine interaction. The control system can reach producing requirements, high reliability, easy to operate and maintain.

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Dissertationen zum Thema "Modbus TCP communication protocol"

Záviš, Jan. „Model křižovatky s průmyslovou komunikací“. Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442438.

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This diploma project summarizes a theoretical introduction regarding the issue of traffic light control. Further there is industrial communication discussed, where they are the Ethernet / IP protocol and the Modbus TCP protocol described more in detail. The following is the description of the Logix series programmable controllers. Then the diploma follows up with market research in order to find the most suitable development kit which is used as a trial prototype. Then it is concerned with a development kit with a communication module from AND-TECH company. Software was developed on them, more specifically a library for processor ports, memory and the Modbus TCP protocol. After verifying the functionality of the software, the hardware design was started. From the first site it is development kit and module and from the second site there are input and output circuits. There must be the assessment of the results found during the test operation. The end of the document describes incorrect steps that were repaired in hardware.

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Otčenášek, Martin. „Distribuované řídící systémy a jejich využití v praxi“. Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217601.

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In control technique there is evident highly expressive trend of shifting from efficient central managing systems towards smaller systems which are distributed on technology and which are connected by communication bus. There is no need to link all signals to central management system, operation is then distributed and realized directly in individual parts of technology. That’s why these systems are called distributive managing systems. Distributive managing systems are widely used not only in industrial applications but also in buildings, cars, etc..

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Ramalata, Mulalo Phillip. „Development and implementation of a modbus based wireless air protocol“. Thesis, Stellenbosch : Stellenbosch University, 2004. http://hdl.handle.net/10019.1/49910.

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Thesis (MScEng)--University of Stellenbosch, 2004.
ENGLISH ABSTRACT: The recent performance improvements of wireless communication systems are presenting possibilites for the use of wireless networks for industrial applications, which typically impose severe restrictions in terms of response time and flexibility. Traditionally most of the industrial protocols employ cable connections, which have limitations in terms of flexibility and development oportunities. The industrial protocol used for this project, is the Modbus protocol. This protocol is developed and implemented on a wireless environment by using data radio modems. The Modbus protocol is a master/slave protocol which provides an industry standard for industrial data transfer. A Modbus driver is designed for radio networks, so that it can function with different PLCs and SCADA packages, supporting Modbus protocol. This enables control and monitoring to be excercised over a long distance, and enables control equipment to be placed as required and not with particular wiring restrictions.
AFRIKAANSE OPSOMMING: Die onlangse verbetering in radiokommunikasiestelsels bied moontlikhede vir die gebruik van radionetwerke vir industriële toepassings, wat gewoonlik streng beperkings plaas in terme van responstyd en buigbaarheid. Tradisioneel is meeste van die industriële protokolle kabelgebaseer, wat redelik onaanpasbaar is. Die Modbus protokol is as basis in hierdie projek gebruik. Dit is 'n meester/slaaf industriestandaard, wat hier aangepas is vir toepassings met radiomodems. Die Modbus drywer is ontwerp om funksioneel te wees met 'n verskeidenheid van PLC's en SCADA pakette, wat die Modbus protokolondersteun. Dit stel beheer- en meetaksies in staat oor lang afstande en laat relatief vrye plasing toe van toerusting sonder bedradingsbeperkings.

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Šoustar, Jiří. „Modul rozhraní Ethernet pro platformu FITkit“. Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2008. http://www.nusl.cz/ntk/nusl-235428.

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This graduation thesis is aimed at design and implementation of embedded systems, network communication and support of the network communication for embedded systems. Furthermore it introduces school platform FITkit and offers a conceptional extension of the network interface for this platform based on Ethernet network standard. Based on that conception I'm trying to find and describe suitable solution for FITkit platform which realizes a network interface as a form of extension module capable of development supporting.

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Lai, Chengdi, und 赖成迪. „Congestion control for transmission control protocol (TCP) in wirelessnetworks“. Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hub.hku.hk/bib/B47102445.

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The best MPhil thesis in the Faculties of Dentistry, Engineering, Medicine and Science (University of Hong Kong), Li Ka Shing Prize,2010-11.
published_or_final_version
Electrical and Electronic Engineering
Master
Master of Philosophy

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Mouton, A. J. J., C. J. Smith und G. E. Smith. „An efficient communication interface and protocol for motor protection relays“. Journal for New Generation Sciences, Vol 7, Issue 1: Central University of Technology, Free State, Bloemfontein, 2009. http://hdl.handle.net/11462/524.

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Published Article
A company in South Africa is a three-phase induction motor protection relay manufacturer. The function of the protection relay is to capture running data, to provide protection against possible damage, to control an electric motor and to communicate this data to the System Control and Data Acquisition (SCADA) system in a control room. In the case of remote sites e.g. a pump station, the protection relays are used as standalone units. The protection relays are equipped with communication facilities to be used in an instrumentation environment. If a trip occurs or settings need to be changed a technician has to visit the remote site and address the problem. The ideal cost and time effective solution is to perform these tasks remotely via a reliable wireless network. A study was conducted to ascertain the viability of using the standard GSM cellular networks in South Africa to effectively control electric motors and to communicate with the Motor Protection Relays (MPRs) controlling the electric motors in order to determine the status of a motor, settings of the motor, trips that occurred and time of occurrence. It was shown that a node controller could be used to store all the data from various electric motors at a single location. It was also shown that the data from the different electric motors could be analysed at the node controller and that communication can then be initiated from the controller to a responsible person via the GSM network. It was further illustrated that, by making use of the GSM networks in South Africa together with the short message service (SMS), communication and control can be effectively established. SMSs proved to be a reliable means of communication between cellular phones, an embedded network and MPRs. It was shown that software protocols, although slower in communication speed, proved to be reliable and effective for the purpose of transferring information between the node controller and the motor protection relays connected to the electric motors.

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Gupta, Pawan Kumar. „Throughput Enhancement of TCP over Wireless Links“. Thesis, Indian Institute of Science, 2002. http://hdl.handle.net/2005/48.

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The congestion control mechanisms of Transmission Control Protocol (TCP) are very effective in providing best effort service in wired networks, where packet losses are mainly due to congestion in the network. In wireless mobile networks, more often than not, loss of packets is because of corruption of data on the wireless link. The TCP sender responds to these losses as if they are due to congestion, by reducing its congestion window, thereby reducing the rate of flow of packets. The reduction in congestion window is a necessity when network is experiencing congestion to avoid congestion collapse but it is not required if packet losses occur due to corruption of data on the wireless link. This unnecessary reduction in congestion window for corruption losses is the main reason for poor throughput of data transfer in wireless networks. The reduction in congestion window for corruption losses can be avoided if TCP can successfully differentiate between packet losses due to congestion and corruption. We suggest enhancements to TCP that, if implemented, will help the TCP receiver in separately identifying corruption losses and congestion losses. The enhancements are suggested over and above standard TCP NewReno and we call this new scheme as "NewRenoEln (NewReno with Explicit Loss Notification)". We suggest that the TCP sender attach a separate checksum for the TCP header with the packet. Since the length of the TCP header is much smaller as compared to the length of the TCP packet, there is a large probability that the TCP receiver will receive the header portion of the TCP packet without error even if the data portion of the packet is corrupted. Once the header information is found to be correct for a corrupted packet, the receiver can generate reliable Explicit 5oss Notification (ELN) for the sender. We derive an expression for the probability of a receiver generating successful Explicit Loss Notification, assuming a generic link layer protocol that is used for data transfer over wireless link. With this analysis, we show that there is large probability that receiver will generate successful ELN for various channel conditions We also suggest modifications to the sender behavior on receiving successful Explicit Loss Notification from the receiver. With these modifications, the TCP sender will recover from corruption losses without any reduction in congestion window. There is also a need to develop a unified analytical approach for the evaluation of TCP performance. We develop an analytical approach for the performance evaluation of NewRenoEln scheme. We compare the throughput results obtained by analytical calculations with results obtained by simulation and find them to be very close to each other. We also compare the performance of the proposed scheme NewRenoEln and the standard NewReno TCP via simulation as well as analytical approach, and find considerable improvement in throughput over wireless links.

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Yuen, Kwan Hung. „TCP performance over satellite networks /“. View Abstract or Full-Text, 2003. http://library.ust.hk/cgi/db/thesis.pl?COMP%202003%20YUEN.

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Thesis (M. Phil.)--Hong Kong University of Science and Technology, 2003.
Includes bibliographical references (leaves 68-71). Also available in electronic version. Access restricted to campus users.

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Li, Zhi. „TCP adaptation schemes in heterogeneous and ad hoc wireless networks“. Click to view the E-thesis via HKUTO, 2005. http://sunzi.lib.hku.hk/hkuto/record/B32037326.

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Li, Zhi, und 李志. „TCP adaptation schemes in heterogeneous and ad hoc wireless networks“. Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B32037326.

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Bücher zum Thema "Modbus TCP communication protocol"

John, Davidson. An introduction to TCP/IP. New York: Springer-Verlag, 1988.

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Chris, Hobbs, und Turton Brian, Hrsg. ATM and Internet protocol: A convergence of technologies. London: Arnold, 1998.

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1971-, Jinmei Tatuya, und Shima Keiichi 1970-, Hrsg. Mobile IPv6: Protocols and implementation. Burlington, MA: Elsevier, 2009.

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Salman, Asadullah, Hrsg. IPV6 in broadband access networks. Hoboken, N.J: Wiley, 2009.

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Mobile IP the Internet unplugged. Upper Saddle River, N.J: PTR Prentice Hall, 1998.

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Yi, Sŏng-chʻun. IPv6 kiban WiBro idongsŏng kisul mit idong AP sisŭtʻem kaebal =: Development of IPv6-based WiBro mobility technology and mobile AP system. [Seoul]: Chisik Kyŏngjebu, 2008.

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Li, Qing. Mobile IPv6: Protocols and implementation. Burlington, MA: Elsevier, 2009.

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Yi, Sŏng-chʻun. IPv6 kiban WiBro idongsŏng kisul mit idong AP sisŭtʻem kaebal =: Development of IPv6-based WiBro mobility technology and mobile AP system. [Seoul]: Chisik Kyŏngjebu, 2008.

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Wireless mobility: The why of wireless. New York: McGraw-Hill, 2010.

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Alex, Galis, Hrsg. Deploying and managing IP over WDM networks. Boston, MA: Artech House, 2003.

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Buchteile zum Thema "Modbus TCP communication protocol"

Hercog, Drago. „TCP Protocol“. In Communication Protocols, 325–35. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-50405-2_21.

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Maldonado, Violeta, Silvana Gamboa, María Fernanda Trujillo und Ana Rodas. „Development of an Industrial Data Server for Modbus TCP Protocol“. In Advances in Intelligent Systems and Computing, 16–28. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-63665-4_2.

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Fovino, Igor Nai, Andrea Carcano, Marcelo Masera und Alberto Trombetta. „Design and Implementation of a Secure Modbus Protocol“. In IFIP Advances in Information and Communication Technology, 83–96. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-04798-5_6.

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Kuang, Jian, Guibao Wang und Jiali Bian. „A Modbus Protocol Stack Compatible with RTU/TCP Frames and Embedded Application“. In Advances in Intelligent and Soft Computing, 765–70. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-27966-9_102.

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Wan, Ming, Yan Song, Yuan Jing, Zhaowei Wang, Jianming Zhao und Zhongshui Zhang. „Software-Defined Data Flow Detection and Control Approach for Industrial Modbus/TCP Communication“. In Advances in Intelligent, Interactive Systems and Applications, 722–29. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-02804-6_94.

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El Khayat, Ibtissam, Pierre Geurts und Guy Leduc. „On the Accuracy of Analytical Models of TCP Throughput“. In NETWORKING 2006. Networking Technologies, Services, and Protocols; Performance of Computer and Communication Networks; Mobile and Wireless Communications Systems, 488–500. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/11753810_41.

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Zhao, Feng, Jinshu Su und Xiaomei Cheng. „OpenRouter: A TCP-Based Lightweight Protocol for Control Plane and Forwarding Plane Communication“. In Networking and Mobile Computing, 1032–41. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/11534310_108.

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Kumar, Pranjal, und P. Arun Raj Kumar. „Towards the Investigation of TCP Congestion Control Protocol Effects in Smart Home Environment“. In Proceedings of the International Conference on Paradigms of Computing, Communication and Data Sciences, 503–14. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-7533-4_39.

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Lars-Åke, Larzon, Mikael Degermark und Stephen Pink. „Requirements on the TCP/IP Protocol Stack for Real-Time Communication in Wireless Environments“. In Quality of Service in Multiservice IP Networks, 273–83. Berlin, Heidelberg: Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/3-540-44554-4_18.

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Yuan, Shuai, Peng Liu und En Zhao. „Research on Security Protection of the Communication Network for Space TT&C Based on TCP/IP Protocol Vulnerabilities“. In Proceedings of the 28th Conference of Spacecraft TT&C Technology in China, 557–66. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-4837-1_45.

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Konferenzberichte zum Thema "Modbus TCP communication protocol"

Luswata, John, Pavol Zavarsky, Bobby Swar und Davison Zvabva. „Analysis of SCADA Security Using Penetration Testing: A Case Study on Modbus TCP Protocol“. In 2018 29th Biennial Symposium on Communications (BSC). IEEE, 2018. http://dx.doi.org/10.1109/bsc.2018.8494686.

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Deng, Li, Yisong Peng, Cancheng Liu, Xiaoshuai Xin und YuCen Xie. „Intrusion Detection Method Based on Support Vector Machine Access of Modbus TCP Protocol“. In 2016 IEEE International Conference on Internet of Things (iThings) and IEEE Green Computing and Communications (GreenCom) and IEEE Cyber, Physical and Social Computing (CPSCom) and IEEE Smart Data (SmartData). IEEE, 2016. http://dx.doi.org/10.1109/ithings-greencom-cpscom-smartdata.2016.90.

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Yan, Hui, und Yongbo Lai. „Design of P2P Network Communication Based on MODUBS/TCP Protocol“. In 2009 Second Pacific-Asia Conference on Web Mining and Web-based Application (WMWA). IEEE, 2009. http://dx.doi.org/10.1109/wmwa.2009.57.

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Chen, Bo, Nishant Pattanaik, Ana Goulart, Karen L. Butler-purry und Deepa Kundur. „Implementing attacks for modbus/TCP protocol in a real-time cyber physical system test bed“. In 2015 IEEE International Workshop Technical Committee on Communications Quality and Reliability (CQR 2015). IEEE, 2015. http://dx.doi.org/10.1109/cqr.2015.7129084.

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Oluwatope, Ayodeji, Biodun Obabire, G. Adesola Aderounmu und Matthew Adigun. „End-to-End Performance Evaluation of Selected TCP Variants across a Hybrid Wireless Network“. In InSITE 2006: Informing Science + IT Education Conference. Informing Science Institute, 2006. http://dx.doi.org/10.28945/3022.

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Reliable transport protocols such as TCP are tuned to perform well in traditional networks where packet losses occur mostly because of congestion. TCP is intended for use as a highly reliable end-to-end transport protocol for transporting applications such as World-Wide Web (WWW) between hosts in packet-switched computer communication networks. TCP was originally designed for wired links where the error rate is really low and actually assumed that packet losses are due to congestion in the network. However, the increasing popularity of wireless networks indicates that wireless links will play more important role in future internetworks but TCP performance in such networks suffers from significant throughput degradation and very high interactive delays. TCP responds to all losses by invoking congestion control and avoidance algorithms, resulting in degraded end-to-end performance in wireless and lossy systems. Thus, in a bid to show and determine the possibility of adapting TCP protocol for optimal performance on the wireless link, this paper reviews and models the behaviors of TCP variants with a view to evaluate the end-to-end performance analysis of TCP versions: TCP Reno, TCP SACK and TCP Westwood (TCPW), which are designed to improve the performance of TCP in lossy networks. A wireless network model was developed using NS-2 network simulator which and the model was simulated. The results were analyzed in MATLAB 6.5 using throughput as a metric for comparison. The overall results indicate that TCP Westwood (TCPW) demonstrates better performance indices over other versions in a hybrid wireless network environment.

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Vargas Salgado, Carlos, Jesús Águila-León, Cristian Chiñas-Palacios und David Alfonso-Solar. „Supervisory Control And Data Acquisition system applied to a researching purpose microgrid based on Renewable Energy“. In INNODOCT 2020. Valencia: Editorial Universitat Politècnica de València, 2020. http://dx.doi.org/10.4995/inn2020.2020.11898.

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Control and data acquisition systems are required in researching facilities to analyze the behaviour of any process. In this paper, the results of the design and implementation of an automation and control system applied to a microgrid based on renewables energy are shown. The microgrid is located in the Laboratory for Distributed energy resources – LabDER at the Institute for Energy Engineering at UPV. The brain of the system is a PLC, programmed to carry out several tasks to guarantee the correct operation of the system. The measuring devices used are power meters, anemometer, temperature sensors and a solar cell to measure irradiance. The communication protocol used is Modbus TCP IP, Modbus RS-485 and Xanbus. All the information is centralized using a SCADA as an HMI. As a result, a robust control, and data acquisition system, able to manage a microgrid for researching purpose was obtained.

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Gasbarro, Lorenzo, Jinlong Liu, Christopher Ulishney, Cosmin E. Dumitrescu, Luca Ambrogi und Michele Battistoni. „Development of the Control and Acquisition System for a Natural-Gas Spark-Ignition Engine Test Bench“. In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-11485.

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Abstract Investigations using laboratory test benches are the most common way to find the technological solutions that will increase the efficiency of internal combustion engines and curtail their emissions. In addition, the collected experimental data are used by the CFD community to develop engine models that reduce the time-to-market. This paper describes the steps made to increase the reliability of engine experiments performed in a heavy-duty natural-gas spark-ignition engine test-cell such as the design of the control and data acquisition system based on Modbus TCP communication protocol. Specifically, new sensors and a new dynamometer controller were installed. The operation of the improved test bench was investigated at several operating conditions, with data obtained at both high- and low-sampling rates. The results indicated a stable test bench operation.

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Breeding, Charlie, Danny Tandra und Sandeep Shah. „Boiler Cleaning Using ISB (Intelligent Soot Blowing) System Integration: Recent Developments and Case Study“. In ASME 2010 Power Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/power2010-27322.

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Ash and slag deposits in coal fired boilers contribute to boiler in-efficiency, capacity reductions, and overheated tubes, which lead to tube failures. Typical on-line cleaning systems are not automated and do not optimize the removal of ash and slag deposits. The paper describes the development and implementation of an Intelligent Sootblowing (ISB) system which monitors data such as heat transfer rate and pendant weight and operates the boiler cleaning devises in an automatic mode. The system operates cleaning equipment to only clean what needs to be cleaned, thus reducing tube erosion and clinker formation. The Intelligent Sootblowing (ISB) system uses the process data, algorithms, thermodynamic models, and ash weight to derive a supervisory sequence control to initiate most effective sootblowing device, when and where necessary. Unique strain gage ash weight measurement feedback is utilized in the system. The system is modular and built with an Open Architecture off the shelf components. It comprises PLC Panels, Data Acquisition Panels and HMI (Human Machine Interface) / EWS (Engineering Work Station) using distributed controls architecture. This system also supports industry standard communication protocols, which provides seamless integration between the ISB system and the plant’s DCS. This protocol can be Ethernet, Modbus, Modbus TCP, DH+ or Serial. The Case Studies will describe existing installations where the integrated system controls the entire boiler cleaning system. One installation is in Texas for an 850 MW, supercritical Combustion Engineering tangential fired pulverized coal unit. The boiler burns Texas lignite coal with as much as 15% Powder River Basin coal blended. The soot blowing system consists of 50 retractable soot blowers and 8 water cannons plus air heater cleaners. Testing for this unit was supervised by EPRI. A second installation is in Louisiana where the system improved overall plant efficiency as much as 1% with a resulting high return on investment. Improvements also included improved heat rate, boiler efficiency, a reduction in spray flow and a reduction in soot blowing events.

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Xiao, Zeyu. „Application of Modbus / TCP Protocol in Smart Home“. In 2nd International Conference on Mechatronics Engineering and Information Technology (ICMEIT 2017). Paris, France: Atlantis Press, 2017. http://dx.doi.org/10.2991/icmeit-17.2017.78.

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Mecham, Travis, Bruce Wilkerson und Bryan Templeton. „Full Integration of SCADA, Field Control Systems and High Speed Hydraulic Models: Application Pacific Pipeline System“. In 2000 3rd International Pipeline Conference. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/ipc2000-240.

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Recent advances in PLC, SCADA and leak detection system technologies lead to the development of a highly integrated control system. Interconnected with fiber optic communication speeds (OC-1), this level of integration moves away from the historic model of stand-alone field controllers connected over low speed communication links to a centralized control center which, in turn, exchanges data from the host system to stand-alone leak detection processors. A new system design approach utilized familiar pipeline control elements such as PLC controllers and MODBUS communication protocols in combination with elements more typically associated with an office environment such as Windows NT servers, PC compatible computers, and Ethernet TCP/IP communications networks. These open-architecture components were used to fully develop, debug and test the SCADA system prior to system startup. The pipeline simulator is used as the centerpiece for this process to perform thorough operational validation of the system long before initial linefill. Once the various components were fully tested they were exported to the physical system in an operational state. The result is nearly seamless control systems supported by high data rates, high model speeds, common databases, and multi-channel communications. The increased level of integration has had dramatic impacts in leak detection, system safety, engineering development, operator training, and overall reliability of the control systems. The following paper presents a narrative overview of these new developments in the context of an implementation on Pacific Pipeline System (PPS). PPS is a recently constructed and commissioned 209 km (130 mile), 50.8 cm (20″) diameter, hot crude oil pipeline between the southern portion of California’s San Joaquin Valley and refineries in the Los Angeles basin. Following the Interstate 5 corridor over the “Grapevine”, Tejon Pass, Angeles National Forest and through heavily populated areas, this pipeline traverses some of the most environmentally and safety sensitive regions in the United States. The joint federal and state Environmental Impact Report / Environmental Impact Statement (EIR/EIS) set high hurdles for leak detection and control system performance. The historic control architecture and technologies were not adequate. This paper provides an overview of the environmental and physical constraints of the Pacific Pipeline System alignment, hydraulics, pumping and metering equipment, and block valve locations. It also discusses their impact on the design, programming and commissioning of a SCADA system meeting the requirements of the EIR/EIS. The paper then describes in more detail the fiber-optic communication system, control system architecture, SCADA system, leak detection models, simulator models and implementation methods, along with the engineering decisions leading to a comprehensive solution for the SCADA and leak detection requirements.

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