In this project a concept for developing and improving the control and monitoring of a power transformer by using a plc is presented. A plc system can contribute with several key functionalities which are necessary in...
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In this project a concept for developing and improving the control and monitoring of a power transformer by using a plc is presented. A plc system can contribute with several key functionalities which are necessary in the ongoing reconstruction of the power grid, towards the smart grid concept. However due to a high variation in the design of the power transformer, it is neces- sary to use a smart code structure. This report presents a possible code structure of the control logic and simulation model, that can be used for validation of the control logic, as well as reducing the developing time for this type of projects. In order to obtain this, the project have been utilizing features from the object oriented programming which enables for easy modification, adding, removing, etc of different functionalities in the plc program. In this project the reusability and flexibility in the code structure have been increased by building the application in several layers based on basic components. This is accomplished by using two of the four foundations of object oriented programming, inheritance and encapsulation. This approach will reduce the required time for developing the control logic but also encourage to utilize the benefits of simulation earlier and give the engineer faster feedback.
Cílem této bakalářské práce je zdokonalit stávající řešení robotického stolního fotbalu, který vznikl v rámci studentských prací při společnos...
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Cílem této bakalářské práce je zdokonalit stávající řešení robotického stolního fotbalu, který vznikl v rámci studentských prací při společnosti B&R Automation. Práce se zabývá systémovou integrací jednotlivých dílčích řešení celého robotického fotbalu pomocí modulárního designu a tvorbou uživatelského rozhraní včetně vizualizace polohy míčku a hráčů na obrazovce. Součástí práce je i tvorba počítačové dynamické simulace pro testování herní strategie.
Diplomová práce se zabývá virtuálním zprovozněním robotizovaného pracoviště určeného ke gravírování deskových materiálů a jejich následn...
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Diplomová práce se zabývá virtuálním zprovozněním robotizovaného pracoviště určeného ke gravírování deskových materiálů a jejich následného balení. V teoretické části jsou shrnuty poznatky přispívající k rozvoji virtuálního zprovoznění a popsána zařízení nacházející se v zadané robotizované buňce. V praktické části je následně přiblížen postup sestavení simulačního modelu v softwaru Process Simulate, tvorba plc programu pomocí vývojového prostředí TIA Portal a v neposlední řadě tvorba vizualizace HMI panelu. Na závěr bylo provedeno samotné virtuální zprovoznění pracoviště následované dodatečnou úpravou a validací robotického programu.
IEC 61131-3, the world-wide standard for industrial control programming, is increasingly being used in safety-related control applications. Control loops are built from components taken from domain-specific function b...
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IEC 61131-3, the world-wide standard for industrial control programming, is increasingly being used in safety-related control applications. Control loops are built from components taken from domain-specific function block libraries. Code inspection and testing are the two predominant quality assurance techniques. For highly dependable control applications, however, these techniques are not sufficient, in general. This paper suggests to augment testing with compositional, theorem-prover supported verification. The approach is based on a representation of IEC 61131-3 function blocks in higher-order logic. The verification task is separated into the a priori verification of library components and a separate proof of individual application programs.
The use of simulation software allows control engineers to design better solutions, reduce development costs and avoid possible critical errors in the process to be controlled. In addition, simulation software can be ...
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The use of simulation software allows control engineers to design better solutions, reduce development costs and avoid possible critical errors in the process to be controlled. In addition, simulation software can be used in education to provide students with realistic problems. Although there are a host of different solutions for continuous systems, there are few simulators of industrial processes focused on automation technologies. In this work, we present a new 3D simulation software of industrial systems for programmable logic controller (plc) educational exercises. The application includes a physics simulation engine based on videogame technology, it can communicate with plcs using the OPC protocol, and allows the student to test their designs in real time. Moreover, an extension of the application enables the automated assessment of student work, by operating in conjunction with the Goodle GMS e-learning platform. The simulation software has been used in two process automation courses during 2011 and 2012.
IEC 61131-3, the world-wide standard for industrial control programming, is increasingly being used in embadded control applications. The standard supports the concept of reusable “software ICs” through the concept ...
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IEC 61131-3, the world-wide standard for industrial control programming, is increasingly being used in embadded control applications. The standard supports the concept of reusable “software ICs” through the concept of function blocks. can be hierarchically grouped and horizontally “wired” to Complex control loops are typically built from elementary components taken from domain-specific libraries. Code inspection and testing are the two predominant quality assurance techniques in practice, today. For highly dependable control applications, however, these techniques are not sufficient, in general. This paper suggests to augment testing with compositional, theorem-prover supported verification. The approach is based on a representation of IEC 61131-3 function blocks in higher-order logic. The verification task is separated into the a priori verification of library components and a separate proof of individual application programs. The latter relies on proven properties of the library components used. We sketch the semantic embedding of three most used languages of the IEC standard and illustrate our verification approach with a simple example. We conclude with a wish list for a verification tool that is usable by application and licensing engineers.
article presents developed method and general principles of creating ladder diagrams, which are commonly used for systems with programmable logic controllers (plc). Ladder diagrams are created for sequential control s...
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article presents developed method and general principles of creating ladder diagrams, which are commonly used for systems with programmable logic controllers (plc). Ladder diagrams are created for sequential control systems of technological processes, which are described by a connection pattern, time diagrams of the executive elements` operation. The executive elements are double-acting pneumatic or hydraulic actuators controlled by bistable electrovalves. A method of designing sequential systems enabling the creation of a ladder electro-pneumatic system is presented. The ladder diagram consists of two parts. One is responsible for controlling the valve coils, the other for the implementation of the memory block. The signals that control the transition to the next state are the signals described on the boundaries of the graph division. The synthesis of control systems and their verification was carried out using the computer aided program FluidSim by Festo.
In order to improve the automation degree of robot, design size of the robot is reduced, a new industrial robot has been designed using plc, servo motor drive and servo motor as the core component, through the plc pro...
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In order to improve the automation degree of robot, design size of the robot is reduced, a new industrial robot has been designed using plc, servo motor drive and servo motor as the core component, through the plc programming and the Modbus communication. IPC and Delta plc of this kind of robot uses RS232 serial port and communication mode of ASCII protocol to control servo motor, force control software and servo driver use Modbus protocol communication mode for real-time monitoring of motor movement state. Through the plc programming, the positioning function of the industrial robot servo motor is realized. Finally, the system positioning accuracy is higher after the debugging and running, which can meet the requirements for embedded industrial robot design.
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