Thematische Bibliographien / PLC logic

Inhaltsverzeichnis

  1. Zeitschriftenartikel
  2. Dissertationen
  3. Bücher
  4. Buchteile
  5. Konferenzberichte
  6. Berichte der Organisationen

Auswahl der wissenschaftlichen Literatur zum Thema „PLC logic“

Autor: Grafiati
Veröffentlicht am 28. Juni 2021
Zuletzt aktualisiert am 10. Februar 2022

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Zeitschriftenartikel zum Thema "PLC logic"

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Garanina, Natalia Olegovna, Igor Sergeevich Anureev, Vladimir Evgenyevich Zyubin, et al. "Temporal Logic for Programmable Logic Controllers." Modeling and Analysis of Information Systems 27, no. 4 (2020): 412–27. http://dx.doi.org/10.18255/1818-1015-2020-4-412-427.

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We address the formal verification of the control software of critical systems, i.e., ensuring the absence of design errors in a system with respect to requirements. Control systems are usually based on industrial controllers, also known as Programmable Logic Controllers (PLCs). A specific feature of a PLC is a scan cycle: 1) the inputs are read, 2) the PLC states change, and 3) the outputs are written. Therefore, in order to formally verify PLC, e.g., by model checking, it is necessary to describe the transition system taking into account this specificity and reason both in terms of state transitions within a cycle and in terms of larger state transitions according to the scan-cyclic semantics. We propose a formal PLC model as a hyperprocess transition system and temporal cycle-LTL logic based on LTL logic for formulating PLC property. A feature of the cycle-LTL logic is the possibility of viewing the scan cycle in two ways: as the effect of the environment (in particular, the control object) on the control system and as the effect of the control system on the environment. For both cases we introduce modified LTL temporal operators. We also define special modified LTL temporal operators to specify inside properties of scan cycles. We describe the translation of formulas of cycle-LTL into formulas of LTL, and prove its correctness. This implies the possibility ofmodel checking requirements expressed in logic cycle-LTL, by using well-known model checking tools with LTL as specification logic, e.g., Spin. We give the illustrative examples of requirements expressed in the cycle-LTL logic.
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Triwijaya, Santi, Arief Darmawan, Andri Pradipta, and Dara Aulia Feriando. "Cable Car Speed Control Using Programmable Logic Control Based on Fuzzy Logic." Journal of Electronics, Electromedical Engineering, and Medical Informatics 2, no. 3 (2020): 125–29. http://dx.doi.org/10.35882/jeeemi.v2i3.7.

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A cable car is a hanging car that runs by cable. Cable car carrier controlled by DC motor. The cable car can be a solution to accommodate the mobilization of agricultural commodities in areas that are difficult to access while still paying attention to safety and reliability. In this research, the speed of a cable car would be automatically controlled with Programmable Logic Control (PLC). PLC functions as a cable car operation controller by considering 3 parameters, namely: wind speed, maximum load weight, and distance (meters). The speed of the cable car is controlled by the PLC using fuzzy logic. Cable car speed is based on parameters of wind speed, load weight and distance. From the results obtained, the PLC has worked well in regulating the speed of the cable car and if any parameter exceeds the PLC limit, it can turn off the cable car.
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Hu, Zhao Yong, Han Wu He, and Yu Tao Duan. "A New Simulation System of Programmable Logic Controller." Advanced Materials Research 139-141 (October 2010): 1954–58. http://dx.doi.org/10.4028/www.scientific.net/amr.139-141.1954.

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Programmable logic controller (abbr. PLC) is essential for automation in modern industry. In many colleges, it is also an important course for automation major. Currently, PLC is monopolistic technique with foreign company. Simulation of PLC has become popular scheme for substitute to real PLC. Virtual PLC is a kind of common scheme. Otherwise, virtual PLC is unfavorable of practical training for student. The thesis spread out exposition for a new simulation system, which consists of virtual PLC platform and a printed circuit board. The virtual PLC platform had been programmed under visual C++ by authors. It is a graphical programming tool, and is an interpretive routine too. Based on MCU, the board is developed for communication between virtual PLC and real control objects. The simulation system has been tried out. As an example, traffic light control of intersection shows feasibility and effectiveness.
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Wang, Li Wei. "Programmable Logic Controller Program Design Method Research Based on PLC." Applied Mechanics and Materials 713-715 (January 2015): 1281–84. http://dx.doi.org/10.4028/www.scientific.net/amm.713-715.1281.

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The working principle of Programmable Logic Controller (PLC) is introduced. Three kinds of PLC programming method, logic based method, function based method and Petri Net based method are emphasized. The example is also given. It also points out that function based PLC programming method is a practical engineering method.
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Hudedmani, Mallikarjun G., R. M. Umayal, Shiva Kumar Kabberalli, and Raghavendra Hittalamani. "Programmable Logic Controller (PLC) in Automation." Advanced Journal of Graduate Research 2, no. 1 (2017): 37–45. http://dx.doi.org/10.21467/ajgr.2.1.37-45.

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Gunawan, Budi, and Yelly Prawoto. "Aplikasi Programmable Logic Controller (PLC) Omron CPM2A Sebagai Komponen Utama Sistem Pengukur Kecepatan Putar (RPM) Motor DC." Simetris : Jurnal Teknik Mesin, Elektro dan Ilmu Komputer 2, no. 1 (2013): 48. http://dx.doi.org/10.24176/simet.v2i1.98.

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Abstrak PLC (Programmable Logic Control) banyak dipakai dalam dunia industri sebagai unit kontrol utama pada mesin-mesin produksi. PLC merupakan sekumpulan saklar elektronik yang dapat diatur kapan harus ON dan kapan harus OFF sesuai dengan hukum-hukum kontrol logic yang telah diprogram. Salah satu keunggulan dari PLC adalah dapat digunakan menjadi Alat Pengatur mesin yang berlainan hanya dengan mengubah program yang ada dalam PLC tanpa harus mengubah perangkat kerasnya. Pada penelitian ini akan dirancang bangun penggunaan PLC untuk menggerakkan motor DC 12 Volt Sekaligus membaca kecepatan putarnya (RPM) dengan menggunakan sebuah piringan yang berlubang yang akan dibaca oleh sensor LDR. Kata kunci : PLC, motor, control, RPM, sensor
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Elamurugan, P., K. VinothBresnav, D. Abirami, and K. G.Suhirdham. "Automatic Material Segregation Using PLC." International Journal of Engineering & Technology 7, no. 2.24 (2018): 376. http://dx.doi.org/10.14419/ijet.v7i2.24.12088.

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At the present timeunusedghettoizationindications a vivaciousstarring protagonist in discardedsupervision system. The inappropriateapartheid of variegatedsurplus that split ends up in landfills sort out not fadingas it ought to be. This red-top grants knowledge of ghettoizing the substantial inevitably concluded the assistance of programmable logic controller (PLC). This treasure troveobliging to moderate the manual maneuver in the progression of reconditioning the alienatedquantifiable such in place ofpewter, cut-glass, malleable and supplementary devises crumpled consuming the air-filled piston. The dissimilar capacitive, proximity sensors etc. devours engaged in the process. The reprocessed product which partakes per received mutable byproduct. The sensible stirring on a conveyer belt intuited by the relevant sensors segregated into poles apartcontainers using a gearing contrivance. The entire component partakes organized by a programmable logic controller (PLC) staysencodedthroughPLClanguage by means of ladder logic.
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Huyck, Bart, Hans Joachim Ferreau, Moritz Diehl, et al. "Towards Online Model Predictive Control on a Programmable Logic Controller: Practical Considerations." Mathematical Problems in Engineering 2012 (2012): 1–20. http://dx.doi.org/10.1155/2012/912603.

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Given the growing computational power of embedded controllers, the use of model predictive control (MPC) strategies on this type of devices becomes more and more attractive. This paper investigates the use of online MPC, in which at each step, an optimization problem is solved, on both a programmable automation controller (PAC) and a programmable logic controller (PLC). Three different optimization routines to solve the quadratic program were investigated with respect to their applicability on these devices. To this end, an air heating setup was built and selected as a small-scale multi-input single-output system. It turns out that the code generator (CVXGEN) is not suited for the PLC as the required programming language is not available and the programming concept with preallocated memory consumes too much memory. The Hildreth and qpOASES algorithms successfully controlled the setup running on the PLC hardware. Both algorithms perform similarly, although it takes more time to calculate a solution for qpOASES. However, if the problem size increases, it is expected that the high number of required iterations when the constraints are hit will cause the Hildreth algorithm to exceed the necessary time to present a solution. For this small heating problem under test, the Hildreth algorithm is selected as most useful on a PLC.
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Zhang, De Min, and Shi Bo Li. "Research on the Design and Manufacture of Steam Cleaning Machine Based on PLC." Applied Mechanics and Materials 721 (December 2014): 322–25. http://dx.doi.org/10.4028/www.scientific.net/amm.721.322.

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In this paper, the programmable logic controller (PLC) produced the steam cleaning machine controller based on PLC and foundation design, and steam cleaning device controlled the process of the realization .The programmable logic controller PLC programming and logic design, system realizes according to different artifact types, complete cleaning, blowing, drying the corresponding action. This system after careful design, manufacturing and detailed inspection, and after the running test, the experimental results shows that: as long as the proper maintenance and proper use of equipment, the project can improve the efficiency to a great extent.
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Hidayati, Qory, Fathur Zaini Rachman, Nur Yanti, Nurwahidah Jamal, and Suhaedi Suhaedi. "Desain Model dan Simulasi PLC-Mikrokontroler sebagai Modul Pembelajaran Berbasis PLC." Jurnal Teknologi Rekayasa 2, no. 2 (2017): 73. http://dx.doi.org/10.31544/jtera.v2.i2.2017.73-82.

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Programmable Logic Controller (PLC) merupakan suatu piranti yang dibuat sebagai pengganti kumpulan relai-relai mekanik yang digunakan dalam sistem kontrol. PLC berkerja dengan cara membaca instruksi-instruksi dari masukannya. Karena PLC pada umumnya memiliki harga yang cukup mahal dan hanya beberapa orang yang dapat mempelajarinya, maka dibuatlah PLC trainer. PLC trainer dirancang menggunakan mikrokontroler Arduino Uno, modul input (berupa: toggle switch, push button, dan limit switch), dan modul output (berupa: LED, seven segment, motor DC, dan buzzer). PLC trainer juga dilengkapi prototype lampu lalu lintas sebagai modul output simulasi lampu lalu lintas empat arah. PLC trainer memanfaatkan LDmicro untuk membuat pemrograman ladder diagram dengan instruksi-instruksi sesuai dengan keinginan programmer dan menggunakan software Xloader untuk upload program ke Arduino Uno. Dari hasil pengujian diperoleh bahwa mikrokontroler Arduino Uno dapat dimanfaatkan sebagai PLC trainer untuk modul pembelajaran.Kata kunci: Programmable Logic Controller, Arduino Uno, modul input-output, lampu lalu lintas
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Dissertationen zum Thema "PLC logic"

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Mohan, Ashwin. "A fuzzy controller developed in RSLogix 5000 using ladder logic and function blocks implemented on a Control Logix PLC /." free to MU campus, to others for purchase, 2004. http://wwwlib.umi.com/cr/mo/fullcit?p1420941.

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Cheng, Yuan-Teng. "Algorithm and intelligent tutoring system design for ladder logic programming." Thesis, [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-1449.

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Tesfaye, Mussie. "Secure Reprogramming of a Network Connected Device : Securing programmable logic controllers." Thesis, KTH, Kommunikationssystem, CoS, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-104077.

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This is a master’s thesis project entitled “Secure reprogramming of network connected devices”. The thesis begins by providing some background information to enable the reader to understand the current vulnerabilities of network-connected devices, specifically with regard to cyber security and data integrity. Today supervisory control and data acquisition systems utilizing network connected programmable logic controllers are widely used in many industries and critical infrastructures. These network-attached devices have been under increasing attack for some time by malicious attackers (including in some cases possibly government supported efforts). This thesis evaluates currently available solutions to mitigate these attacks. Based upon this evaluation a new solution based on the Trusted Computing Group (TCG’s) Trusted Platform Modules (TPM) specification is proposed. This solution utilizes a lightweight version of TPM and TCG’s Reliable Computing Machine (RCM) to achieve the desired security. The security of the proposed solution is evaluated both theoretically and using a prototype. This evaluation shows that the proposed solution helps to a great extent to mitigate the previously observed vulnerabilities when reprogramming network connected devices. The main result of this thesis project is a secure way of reprogramming these network attached devices so that only a valid user can successfully reprogram the device and no one else can reprogram the device (either to return it to an earlier state, perhaps with a known attack vector, or even worse prevent a valid user from programming the device).<br>Avhandlingen börjar med att ge lite bakgrundsinformation för att läsaren att förstå de nuvarande sårbarheten i nätverksanslutna enheter, särskilt när det gäller IT-säkerhet och dataintegritet. Idag övervakande kontroll och datainsamlingssystem använder nätverksanslutna programmerbara styrsystem används allmänt i många branscher och kritisk infrastruktur. Dessa nätverk anslutna enheter har under ökande attacker under en tid av illvilliga angripare (inklusive i vissa fall eventuellt regeringen stöds insatser). Denna avhandling utvärderar för närvarande tillgängliga lösningar för att minska dessa attacker. Baserat på denna utvärdering en ny lösning baserad på Trusted Computing Group (TCG) Trusted Platform Modules (TPM) specifikation föreslås. Denna lösning använder en lätt version av TPM och TCG:s pålitliga dator (RCM) för att uppnå önskad säkerhet. Säkerheten i den föreslagna lösningen utvärderas både teoretiskt och med hjälp av en prototyp. Utvärderingen visar att den föreslagna lösningen bidrar i stor utsträckning för att minska de tidigare observerade sårbarheter när omprogrammering nätverksanslutna enheter.  Huvudresultatet av denna avhandling projektet är ett säkert sätt omprogrammering dessa nätverksanslutna enheter så att endast ett giltigt användarnamn framgångsrikt kan omprogrammera enheten och ingen annan kan programmera enheten (antingen att återställa den till ett tidigare tillstånd, kanske med en känd attack vector, eller ännu värre förhindra en giltig användare från programmering av enheten).
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Johansson, Marcus, and Jacob Nilsson. "Virtuell driftsättning : Verifiering av PLC logik mot simuleringsprogram." Thesis, Högskolan i Skövde, Institutionen för ingenjörsvetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-11529.

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För att korta ner den totala driftsättningstiden i projekt beslutade Volvo Cars Skövde om att undersöka möjligheterna för verifiering av PLC-logik mot simuleringsprogram. Det övergripande målet med examensarbetet var att undersöka möjligheterna för att upprätta kommunikation mellan flödesimuleringsprogrammet Siemens Plant Simulation och en PLC-enhet. En ingripande förståelse av området virtuell driftsättning skapades vid skrivandet av referensramen och en litteraturstudie vilket legat till grund för det fortsatta praktiska arbetet. Genom en datainsamling med intervjuer, diskussioner och en omfattande litteraturstudie kunde en bättre förståelse bildas kring hur kommunikation mellan de olika programmen fungerar, samt viktiga punkter som bör has i åtanke vid virtuell driftsättning överlag. Ett hypotetiskt system utvecklades i Plant Simulation av Volvo Cars Skövde för att användas som testsystem. I emuleringsmjukvaran Simumatik3D skapades en modell för att efterlikna Plant Simulation modellen samtidigt som PLC-logiken utvecklades i Siemens Step 7. Under utvecklingens gång verifierades delsystem i Simumatik3D mot den skapade PLC-logiken tills det att modellen var färdigutvecklad. För att säkerhetsställa att både Simumatik3D modellen och Plant Simulation modellen var valid undersöktes ett antal valideringspunkter. Experimentfasen tog vid efter valideringstestet där olika scenarier undersöktes och testades för att föra upp eventuella problem i modellerna till ytan. En omfattande utvärdering presenteras där hela uppbyggnadsfasen av modeller utvärderas med avseende på tidsåtgång, för- och nackdelar och kommunikation med PLC. De två programmen Simumatik3D och Plant Simulation utvärderades mot varandra för att få ut vilket program som mest lämpar sig för virtuell verifiering av PLC-logik. Ett översiktligt arbetssätt togs fram utifrån den utvärdering som gjorts samt erfarenheter från genomförandet av arbetet. Resultatet av det framtagna arbetssättet presenteras vilket beskriver uppdelningen mellan beställare och leverantör, kommunikationen mellan parterna samt en överskådlig visualisering av arbetssättets process. Resultatet från utvärderingen visade att Simumatik3D lämpar sig åt att verifiera PLC logik på detaljnivå. Utvärderingen visade även att PLC-logik kan verifieras med hjälp av Plant Simulation, dock inte på samma detaljnivå. Plant Simulation lämpar sig istället till att göra simuleringsmodeller mer verklighetstrogna. Virtuell driftsättning av PLC-logik är ett nytt koncept på Volvo Cars Skövde och därför kan resultatet från detta arbete ligga till grund för fortsatt arbete inom detta område. Virtuell verifiering av PLC-logik diskuteras där flera aspekter som är viktiga att tänka på presenteras. Projektens huvudmål att virtuellt verifiera PLC-logik mot simuleringsprogram uppnåddes och gav goda resultat, de uppsatta delmålen resulterade i en omfattande utvärdering och framtida rekommendationer.<br>To shorten project lead times Volvo Cars Skövde decided to explore the possibilities regarding verifi-cation of PLC-logic in simulation programs. The overall objective of the thesis was to analyze the pos-sibilities for establishing communication between the flow simulation program Plant Simulation and a PLC-device. A thorough understanding of the area virtual commissioning was obtained by writing the frame of reference and a literature review which served as basis for the continued practical work. Through a collection of interviews, discussions and an extensive literature review a better under-standing regarding how the communication between the different programs works, along with im-portant points that should be considered under a virtual commissioning project was obtained. A hy-pothetical system was developed in Plant Simulation by Volvo Cars Skövde to be used as a test sys-tem. The Simumatik3D model was created by emulating the Plant Simulation model and at the same time developing the PLC-logic in Siemens Step 7. During the development progress subsystems were verified in Simumatik3D against the created PLC-logic until the model was fully developed. To make sure that both the Simumatik3D model and the Plant Simulation model was valid a number of valida-tion points were tested. After the validation test the experimental phase started were different sce-narios were analyzed and tested to bring up any problems in the models to the surface. A thorough evaluation is presented in which the entire construction phase of the models is evaluated in terms of time required, advantages and disadvantages and communication with the PLC-device. The two pro-grams Simumatik3D and Plant Simulation was evaluated against one another in order to find out which program that is the most suited for virtual verification of PLC-logic. An overall methodology was developed based on the evaluation carried out and the experience gained from the implementa-tion of the work. The result from the developed methodology is presented which describes the parti-tion between the client and supplier, the communication between them and a visualization of the methodology-process. The result from the evaluation showed that Simumatik3D was more suitable for verification of PLC logic on a detailed level. The evaluation also showed that the PLC logic could be verified with Plant Simulation, but not on the same detailed level. Plant Simulation was more suit-able for making simulation models more realistic. Virtual commissioning of PLC-logic is a new con-cept on Volvo Cars Skövde and therefore can the result from this thesis form a basis for future work in this area. Virtual verification of PLC-logic is discussed in which several important aspects to think about is presented. The projects main goal to virtually verify PLC-logic in simulation programs was achieved and yielded good results, the partial objectives resulted in a thorough evaluation and future recommendations.
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Allensworth, Courtney. "Computer-based process simulator and testing environment for teaching PLC sequential logic systems /." Available to subscribers only, 2007. http://proquest.umi.com/pqdweb?did=1328064261&sid=24&Fmt=2&clientId=1509&RQT=309&VName=PQD.

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OKUMA, Shigeru, Tatsuya SUZUKI, Takashi MUTOU, and Eiji KONAKA. "Optimal Design of Sensor Parameters in PLC-Based Control System Using Mixed Integer Programming." Institute of Electronics, Information and Communication Engineers, 2005. http://hdl.handle.net/2237/14990.

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Tarasso, Markus, and Daniele Usai. "Utveckling av kontrollrumsstyrning : För DC-generator genom PLC och HMI." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-22104.

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Projektet går ut på att ersätta den befintliga styrningen av en DC-generator för 1200 kV med en fjärrstyrning från kontrollrummet via optolänk. Den nya styrningen ska utgöras av ett PLC-system (Programmable Logic Controller) som manövreras med hjälp av ett HMI – Human Machine Interface. Bakgrunden till projektet härrör från att den befintliga styrutrustningen är opålitlig samt styrs i en farlig miljö. Rapporten går igenom hur befintlig styrutrustning fungerar samt dess ingående komponenter, hur ett PLC-system fungerar med dess bakgrund och olika programmeringsspråk. Även programmeringen och byggnationen av det nya systemet avhandlas. I slutet av rapporten ges en genomgång av de provkörningar som utförts för att säkerställa att alla funktioner fungerar som tänkt. Resultat av provkörningarna ges och diskussion förs kring projektet. Projektet är utfört åt högspänningsgruppen på RISE i Borås som använder generatorn bland annat vid kalibrering av spänningsdelare. Det nya styrsystemet innefattar alla av den tidigare styrutrustningens funktioner och några nya funktioner så som överströms- och överspänningsskydd vilka slår från spänningsmatningen om dessa begränsningar överskrids. Att styrutrustningen nu är placerad i kontrollrumsmiljö gör att operatören kan hantera utrustningen utan att vara i närheten av farlig spänning.<br>The report aims to replace the current control equipment for a DC-generator for 1200 kV by remote control from control room through optical fibre link. The new control will be a PLC system controlled by a HMI – Human Machine Interface. The background to the project is that the existing control equipment is unreliable and controlled in a dangerous environment. The report shows how the current control equipment works and its constituent components, how a PLC-system works with its background and different programming languages. This report will also describe how the programming and building of the hardware are done. In the end of this report are going through a test run to confirm that the system is working properly. Result of the test run are given and some discussion. The project is initiated by the high voltage group at RISE in Borås, who are using the DC-generator for instance while calibrating voltage dividers. The new control system contains all of the functions from the earlier control system but also some new functions such as overcurrent and overvoltage protection who turns off power supply if the limits are exceeded. The control system is now located in the control room so that the operator can use the system without being close to high voltage.
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Rickey, Matthew R. "Fuzzy Logic Learning for Predictive Feedback Estimation in a Radiant Heat System." Wright State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=wright1278616429.

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Alavizadeh, Zahra. "PLC Controlled System for Local Humidity Management in Electronic Enclosures." Thesis, Jönköping University, JTH, Computer and Electrical Engineering, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-13148.

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<p>This master thesis is about investigation a power efficient anti-moisture device thatcan be implemented in electronic enclosures in severe climatic environments.First, some of the existing knowledge and previous works were introduced. Then arelevant theoretical background including three main approaches in humiditymanagement are described, comparison between the enclosure heaters and localheaters, some psychrometics concepts that have been used in the project, heattransfer fundamentals, environmental test basics, some humidity and temperaturesensing techniques, computational fluid dynamics, programmable logic controlfundamentals, comparison PLCs with microcontrollers was provided.A series experiments have been performed in order to find the power efficient andmost effective anti-moisture method. Based on the analysis of the experiment data,the local heater system has been designed. CFD assisted parametric study of thelocal heater has been performed in order to find the best feasible design includingthe size and location. The local heater has been built based on the results ofparametric study. Different materials have been tested in laboratory in order tofind the proper material for final prototype of heater. The implemented localheater has been integrated with programmable logic control device. The controlalgorithm has been developed for activation/deactivation of local heater. The logiccontrolled PCB local heater has been experimentally evaluated.In the end the results achieved from environmental test have been presented andanalyzed. Some conclusions on the results and also future work have been discussed.</p>
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Klintrot, Oskar, and Daniel Forsström. "Lastfördelning och effektmätning med Arduino och PLC." Thesis, Linnéuniversitetet, Sjöfartshögskolan (SJÖ), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-34236.

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Detta arbete var beställt av Sjöfartshögskolan i Kalmar. Skolan ville ha en enhet som kunde mäta aktiv-, reaktiv- och skenbar effekt, ström, spänning, frekvens och cosϕ på en generator och som kommunicerade vidare dessa värden till en PLC. Detta för att kunna lastfördela lasten mellan ett antal generatorer i kursen Tillämpad elteknik 15 hp där studenterna bygger en generatorinstallation med tre generatorer. Ett funktionsblock för lastfördelning skulle också programmeras. Prototypen som konstruerades baserades på en Arduino Ethernet och kommunikationen löstes med Modbus TCP/IP över Ethernet. Ett lastfördelningsprogram programmerades i form av ett funktionsblock som studenterna kunde importera till CoDeSys v2.3 och använda i sina installationer. Prototypen kunde läsa av värdena med ungefär samma noggrannhet som ett kommersiellt instrument som använder sig av samma mätteknik som prototypen. Uppdateringsfrekvensen var dock lägre än hos ett kommersiellt instrument. Kommunikationen med PLC:n fungerade utan problem. Då ingen undervisning hölls i arbetets slutskede kunde inte lastfördelningen testas på en fullskalig anläggning. Lastfördelningsprogrammet klarade dock av att hålla rätt frekvens på en ensam generator och fungerade som tänkt när programmet testades i en simulator. Prototypen gav fel mätvärden vid kapacitiv last. Vid jämförelse med en kommersiell tångamperemeter visade sig mätfelet bero på mätmetoden då båda gav liknande resultat. Som referens användes en professionell elkvalitetsanalysator. Alla uppdragsgivarens krav blev uppfyllda och arbetet kommer att kunna användas i undervisningen.<br>This thesis was ordered by Kalmar Maritime Academy. The request was for a device that could measure active, reactive and apparent power, as well as frequency, voltage, current and cosϕ on a generator. The measured values would be communicated to a PLC for use in a load sharing program between a number of generators in the course Tillämpad elteknik, 15 ECTS. In that course the students constructs a three-generator electric power grid. Included in the request was also to program a load sharing program. The prototype being constructed was based on the Arduino Ethernet, and the communication was enabled by means of the Modbus TCP/IP protocol over Ethernet. A load sharing program was created in the form of a function block which the student could import into the CoDeSys for use in the generator systems. The prototype could measure values with close to the same accuracy as a commercial available instrument that were using the same technique for measuring. The refresh rate was however lower than the commercial available instrument. Communication with the PLC worked without any issues. No full-scale testing could be done since no course was held during the final stages of the thesis, however the load sharing program could keep frequency on a single generator alone and worked in a simulated soft environment. Measuring errors occurred when measuring a capacitive load. When comparing to a commercial available clamp meter, the same errors occurred. As a reference a professional power and energy quality analyser was used. All the requests were fulfilled and the result of this thesis will be used in the educational programme at the Academy.
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Bücher zum Thema "PLC logic"

1

Rohner, Peter. PLC Automation with Programmable Logic Controllers. Macmillan Education UK, 1996. http://dx.doi.org/10.1007/978-1-349-14267-5.

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Dropka, Ed. Toshiba medium PLC primer. Butterworth-Heinemann, 1996.

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Clements-Jewery, K. The PLC workbook: Programmable logic controllers made easy. Prentice Hall, 1996.

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4

Huang, Songwei, and Jinhui Zou. Dian qi kong zhi yu PLC ying yong ji shu. Dian zi gong ye chu ban she, 2012.

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PLC, automation with programmable logic controllers: A textbook for engineers and technicians. Macmillan, 1996.

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Rohner, Peter. PLC: automation with programmable logic controllers: A textbook for engineers and technicians. UNSW Press, 1996.

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Thomas, Dewing R., and Perini Matthew J. 1973-, eds. Inference: Teaching students to develop hypotheses, evaluate evidence, and draw logical conclusions : a strategic teacher PLC guide. ASCD, 2012.

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Components, Philips. Data handbook.: 10/100k ECL logic/memory/PLD. Philips Components, 1990.

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Components, Philips. 10/100K ECL logic/memory/PLD: Data handbook. Philips Components Ltd, 1991.

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Waite, Stephen J. A logic model to review material nominated for inclusion into project code PL3. Naval Postgraduate School, 1989.

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Buchteile zum Thema "PLC logic"

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Dey, Chanchal, and Sunit Kumar Sen. "Programmable Logic Controller (PLC)." In Industrial Automation Technologies. CRC Press, 2020. http://dx.doi.org/10.1201/9780429299346-2.

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Rohner, Peter. "PLC Programming Concepts." In PLC Automation with Programmable Logic Controllers. Macmillan Education UK, 1996. http://dx.doi.org/10.1007/978-1-349-14267-5_2.

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Rohner, Peter. "Timers in PLC." In PLC Automation with Programmable Logic Controllers. Macmillan Education UK, 1996. http://dx.doi.org/10.1007/978-1-349-14267-5_5.

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Rohner, Peter. "Counters in PLC." In PLC Automation with Programmable Logic Controllers. Macmillan Education UK, 1996. http://dx.doi.org/10.1007/978-1-349-14267-5_6.

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Bishop, Peter G. "Estimating PLC logic program reliability." In Practical Elements of Safety. Springer London, 2004. http://dx.doi.org/10.1007/978-0-85729-408-1_11.

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Rohner, Peter. "Programming Logic Functions on PLC." In PLC Automation with Programmable Logic Controllers. Macmillan Education UK, 1996. http://dx.doi.org/10.1007/978-1-349-14267-5_3.

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Rohner, Peter. "PLC Programming and Hardware Fundamentals." In PLC Automation with Programmable Logic Controllers. Macmillan Education UK, 1996. http://dx.doi.org/10.1007/978-1-349-14267-5_1.

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Rohner, Peter. "Sequential PLC Machine Control Design." In PLC Automation with Programmable Logic Controllers. Macmillan Education UK, 1996. http://dx.doi.org/10.1007/978-1-349-14267-5_8.

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Rohner, Peter. "Editing, Diagnosing and Documenting PLC Programs." In PLC Automation with Programmable Logic Controllers. Macmillan Education UK, 1996. http://dx.doi.org/10.1007/978-1-349-14267-5_11.

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Rohner, Peter. "Bistable and Monostable Outputs in PLC." In PLC Automation with Programmable Logic Controllers. Macmillan Education UK, 1996. http://dx.doi.org/10.1007/978-1-349-14267-5_4.

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Konferenzberichte zum Thema "PLC logic"

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DeGuglielmo, Nicolas P., Saurav M. S. Basnet, and Douglas E. Dow. "Introduce Ladder Logic and Programmable Logic Controller (PLC)." In 2020 Annual Conference Northeast Section (ASEE-NE). IEEE, 2020. http://dx.doi.org/10.1109/aseene51624.2020.9292646.

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Sages, Terence M. "Programmable Logic Controllers." In ASME 1991 Citrus Engineering Conference. American Society of Mechanical Engineers, 1991. http://dx.doi.org/10.1115/cec1991-3705.

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The use of the programmable logic controller has advanced tremendously since its introduction in the late 1960’s. The programmable logic controller, affectionately known as the PLC in today’s industries, was first introduced as an electrical control relay replacer. The purpose of this paper is to assist those who are considering the application of a PLC in their facility to better understand where programmable logic controller technology has advanced to today. Paper published with permission.
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Kalle, Sushma, Nehal Ameen, Hyunguk Yoo, and Irfan Ahmed. "CLIK on PLCs! Attacking Control Logic with Decompilation and Virtual PLC." In Workshop on Binary Analysis Research. Internet Society, 2019. http://dx.doi.org/10.14722/bar.2019.23074.

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Shiferaw, Dereje, Addisalem Hailegnaw, Alemie Assefa, Daniel Abebe, Eyob Dagne, and Getsh Fekadie. "LabVIEW based Fuzzy Logic Controller for PLC." In 2019 International Conference on Computer, Control, Electrical, and Electronics Engineering (ICCCEEE). IEEE, 2019. http://dx.doi.org/10.1109/iccceee46830.2019.9071278.

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Kocian, Jiri, Jiri Koziorek, and Miroslav Pokorny. "Implementation of fuzzy logic control based on PLC." In Factory Automation (ETFA 2011). IEEE, 2011. http://dx.doi.org/10.1109/etfa.2011.6059049.

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Rahim, A'zraa Afhzan Ab, Mohd Hazwan Md Shah, Ili Shairah Abdul Halim, and Siti Lailatul Mohd Hassan. "Programmable Logic Controller (PLC) for polymer mixing tank." In 2012 IEEE Symposium on Computer Applications and Industrial Electronics (ISCAIE). IEEE, 2012. http://dx.doi.org/10.1109/iscaie.2012.6482084.

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De, Soumen, Nagarajan Sethuraman, and Chengyin Yuan. "A Formal Approach on Specification Modeling to Support Industrial PLC Program Verification." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-67458.

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Intensive global competition requires the automotive manufacturers to launch new vehicle models with a shorter launch time, better quality, lower cost and more customization. One of the key enablers for achieving these objectives is to have an efficient &amp; error-free manufacturing automation system which is typically controlled by Programmable Logic Controllers (PLC). The current PLC logic code testing process in automotive industry is usually performed manually by individual engineer, and the overall testing quality highly depends on the engineer’s expertise and experience. The PLC logic code testing normally consists of two parts, testing requirements (specification) and testing methods. One of the major hurdles for applying rigorous testing methods on PLC logic verification in industry is the lack of formal testing specifications. The current PLC testing specifications and requirements are documented in various formats, such as sequence of operation document, process instrument diagram, wiring diagrams, and time motion diagrams, etc. These varied documents cannot be directly used for control logic testing and require a better alternative. Formal methods, the latest technology widely used in software testing, is an approach selected for generating comprehensive test cases to ensure the correctness and consistency of PLC programs. This paper presents a novel approach for specifying the expected behavior of the already implemented industrial PLC code. The generated formal specification models can work with math-based logic verification tool to facilitate the usage of formal verification in manufacturing automation control. The specification modeling methodology contains all the required information from different logic design and testing phases, such as process sequence, wiring information, logic pattern, code comments, and domain knowledge, etc. And the statecharts is used as model formalism, because of its capability to model states hierarchically and provide a better visual representation.
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Fasano, Raymond, Christopher Lamb, Mohamed El Genk, Timothy Schriener, and Andrew Hahn. "Emulation Methodology of Programmable Logic Controllers for Cybersecurity Applications." In 2020 International Conference on Nuclear Engineering collocated with the ASME 2020 Power Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/icone2020-16245.

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Abstract A programmable logic controller (PLC) emulation methodology can dramatically reduce the cost of high-fidelity operational technology (OT) network emulation without compromising specific functionality. A PLC emulation methodology is developed as part of an ongoing effort at the University of New Mexico’s Institute for Space and Nuclear Power Studies (UNM-ISNPS) in collaboration with Sandia National Laboratories (SNL) to develop an emulytic™ platform to support cybersecurity analyses of the instrumentation and control (I&amp;C) systems of pressurized water reactors (PWRs). This methodology identifies and characterizes key physical and digital signatures of interest. The obtained and displayed digital signatures include the network response, traffic, and software version, while the selected physical signatures include the actuation response time and sampling time. An extensive validation analysis is performed to characterize the signatures of the real, hardware-based PLC and the emulated PLC. These signatures are then compared to quantify differences and identify optimum settings for the emulation fidelity.
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Pham, Kinh D., Ja-Mie Luey, and Darin Schroyer. "Traction Power Substation Protection and Controls Using Programmable Logic Controllers." In ASME/IEEE 2007 Joint Rail Conference and Internal Combustion Engine Division Spring Technical Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/jrc/ice2007-40044.

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A number of microprocessor-based digital devices with communication capabilities have been manufactured for traction power substations. These devices include protective relays, fault recorders, and metering units. One such device is the SIEMENS SITRAS DPU96 relay that provides over-current and rate-of-rise protection for faults on DC traction power distribution system. To fully utilize this digital technology, Programmable Logic Controller (PLC) was the best mean of collecting and organizing data from these devices locally at the traction power substation and also provide easy interface with the SCADA system. PLC was also used for high rail-to-earth potential monitoring and protection. The trip characteristics of this relay require adjustability over the voltage ranges normally from 40Vdc to 160Vdc and time-delay range from 10ms to 3 seconds which can be easily accomplished with PLC programming. This paper describes the applications of digital relays, human machine interface (HMI), and PLC in a traction power substation.
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Tolotta, Vincent P. "The Design and Implementation of a PLC Based Gas Turbine Controller for a Shipboard Application." In ASME Turbo Expo 2000: Power for Land, Sea, and Air. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/2000-gt-0323.

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A paper will be presented describing the design and development of the Gas Turbine Local Controller replacement used on the Magnetic Minesweeping Gas Turbine Generator (MMGTG) on the US Navy MCM-1 Class of ships. The advent of processor based controllers including PLCs has provided a low cost alternative for control system upgrades when faced with increasing maintenance costs and obsolescence issues of analog and hard relay logic control systems. The replacement controller is a Programmable Logic Controller (PLC) based system linked to a flat panel display and a supervisory control system. A MMGTG during pulsing operations applies a severe load transient cycle to the gas turbine for the fuel control to meet in a stable and safe manner. The algorithms which employ an adaptive Proportional Integral Derivative (PID) loop control structure with internal limiting constraints based on engine state are used to manage these transients, power turbine entry temperature and a wide range of steady state operation. The controller includes logic for alarming, start/stop and automatic shutdown. The design of the hardwired automatic shutdown logic integrated to the PLC will be presented. The control system design will be described in terms of its integration to a supervisory network, local control functionality and shipboard considerations. The Human Machine Interface screens of the flat panel display and their design are also considered.
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Berichte der Organisationen zum Thema "PLC logic"

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KOCH, M. R. Saltwell PIC Skid Programmable Logic Controller (PLC) Software Configuration Management Plan. Office of Scientific and Technical Information (OSTI), 1999. http://dx.doi.org/10.2172/798656.

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WHITE, K. A. Saltwell Leak Detector Station Programmable Logic Controller (PLC) Software Configuration Management Plan (SCMP). Office of Scientific and Technical Information (OSTI), 2000. http://dx.doi.org/10.2172/805460.

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Stouffer, Keith, Joe Falco, and Karen Scarfone. Guide to Industrial Control Systems (ICS) Security : Supervisory Control and Data Acquisition (SCADA) Systems, Distributed Control Systems (DCS), and Other Control System Configurations such as Programmable Logic Controllers (PLC). National Institute of Standards and Technology, 2013. http://dx.doi.org/10.6028/nist.sp.800-82r1.

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Stouffer, Keith, Joe Falco, and Karen Scarfone. Guide to Industrial Control Systems (ICS) Security - Supervisory Control and Data Acquisition (SCADA) systems, Distributed Control Systems (DCS), and other control system configurations such as Programmable Logic Controllers (PLC). National Institute of Standards and Technology, 2011. http://dx.doi.org/10.6028/nist.sp.800.82.

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Stouffer, Keith, Joe Falco, and Karen Scarfone. Guide to Industrial Control Systems (ICS) security : Supervisory Control and Data Acquisition (SCADA) systems, Distributed Control systems (DCS), and other control system configurations such as Programmable Logic Controllers (PLC) : recommendations of the National Institute of Standards and Technology, Computer security. National Institute of Standards and Technology, 2011. http://dx.doi.org/10.6028/nist.sp.800-82.

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Rudell, Richard L. Multiple-Valued Logic Minimization for PLA Synthesis. Defense Technical Information Center, 1986. http://dx.doi.org/10.21236/ada606736.

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Hance, R. D0 General Support: The Use of Programmable Logic Controllers (PLCS) at D0. Office of Scientific and Technical Information (OSTI), 2000. http://dx.doi.org/10.2172/1032083.

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Trotter, J. D., and A. K. R. Naini. Bulk CMOS VLSI Technology Studies. Part 1. Scalable CMOS Design Rules. Part 2. CMOS Approaches to PLA (Programmable Logic Array) Design. Defense Technical Information Center, 1985. http://dx.doi.org/10.21236/ada158367.

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Greene, D. L. RUMS: a PC-based Fortran program for estimating consumer surplus charges using multinomial logic and hedonic demand models. Office of Scientific and Technical Information (OSTI), 1986. http://dx.doi.org/10.2172/5381050.

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