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.
This article deals with the development of a Supervisory Control and Data Acquisition SCADA system to be used in a flexible manufacturing cell for educational purposes in different automation engineering fields (SCADA...
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This article deals with the development of a Supervisory Control and Data Acquisition SCADA system to be used in a flexible manufacturing cell for educational purposes in different automation engineering fields (SCADA development, plc programming and industrial communications). When dealing with industrial communications or plc programming the SCADA is employed as a supervision tool. in the other hand, when teaching SCADA systems the application will be developed by the students and the SCADA presented in this article is employed as a model. The application communicates through Internet with four controllers, by means of an OPC server, visualizes comprehensive information about the elements of the cell, includes the video streaming of an IP camera, and features traceability and report generation capabilities. (C) 2008 Wiley Periodicals, Inc.
The paper presents an original idea of the selective control program execution that allows significant response time reduction. The exhaustive analysis of the plc program performance is given. An analytic approach exp...
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The paper presents an original idea of the selective control program execution that allows significant response time reduction. The exhaustive analysis of the plc program performance is given. An analytic approach explains the idea of the selective control program evaluation and gives the requirements for its feasibility. There is presented a systematic and formal method of program analysis based on a data flow graph approach. The method generates acyclic graph from the control program that is subject of optimization, variable allocation and instruction generation. The graph approach allows determining variables dependencies and task partitioning required by selective program execution. The method utilize the hardware supported variable changes detection. It is transparent for system operation and enables evaluation of blocks that require update.
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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