PLC - VIRTUAL INSTRUMENT INTERACTION USING THE OPC UA STANDARD FOR IIoT APPLICATIONS IN INDUSTRY AND REMOTE EDUCATION (INTERACCIÓN PLC - INSTRUMENTO VIRTUAL USANDO EL ESTÁNDAR OPC UA PARA APLICACIONES DE IIoT EN LA INDUSTRIA Y EN LA EDUCACIÓN REMOTA)

Abstract Industrial Internet of Things (IIoT) offers connectivity and information access for industrial devices. However, several devices cannot implement it because of being TCP/IP-incapable or having incompatible communication protocols. The OPC UA standard can be a solution by offering a platform-independent client-server communication model. The goal of the current work is to use OPC UA to connect a Programmable Logic Controller (PLC) in S7-PLCSIM and a Virtual Instrument (VI) in LabVIEW running as a Web Services application to enable applications in industry and remote education. The case study is a SCADA system simulated in FluidSIM. The results show a successful connection and demonstrate that the OPC UA standard can be used for implementing IIoT by connecting a simulated PLC to a VI for bidirectional information exchange in monitoring and control tasks. The former enables students to learn interactively and remotely about PLCs, and industries to improve their process control. Keywords: Industrial Internet of Things (IIoT), OPC UA, Programmable Logic Controller (PLC), Virtual Instrument (VI). Resumen El Internet Industrial de las Cosas (IIoT) ofrece conectividad y acceso a información para dispositivos industriales. Sin embargo, muchos dispositivos no pueden implementarlo por falta de capacidades TCP/IP o por protocolos de comunicación incompatibles. El estándar OPC UA puede ser una solución por su modelo de comunicación cliente-servidor independiente de plataforma. El objetivo del trabajo es usar OPC UA para conectar un Controlador Lógico Programable (PLC) en S7-PLCSIM y un Instrumento virtual (VI) en LabVIEW corriendo como una aplicación de Servicios Web para habilitar aplicaciones industriales y en educación remota. Se estudia un sistema SCADA simulado en FluidSIM. Los resultados muestran una conexión exitosa, demostrando que OPC UA puede usarse para implementar IIoT conectando un PLC simulado a un VI para intercambio bidireccional de información en tareas de monitoreo y control. Esto permite a estudiantes aprender interactiva y remotamente sobre PLCs, y a industrias mejorar su control de procesos. Palabras Clave: Controlador Lógico Programable (PLC), Instrumento Virtual (VI), Internet Industrial de las Cosas (IIoT), OPC UA

Análisis DAFO del sector hotelero: el caso de los hoteles de la ciudad de Sevilla

En el trabajo se realiza un análisis de las Debilidades, Amenazas, Fortalezas y Oportunidades de los hoteles de Sevilla y se establece un Plan de medidas y acción para su mejora. Se ha contado con la participación de profesionales y expertos que representan una muestra adecuada de las empresas del sector. La fórmula utilizada para realizar este análisis ha sido la entrevista personal a los mismos. Su experiencia y apoyo son la mayor garantía para presentar este análisis, así como las medidas y propuestas para conseguir la excelencia de los hoteles de Sevilla en un futuro.This project analyzes SWOT – Strengths, Weaknesses, Opportunities and Threats- of Sevillian hotels, as well as establishes a plan of measures and actions to improve them. Professionals and experts who represent an adequate sampling of businesses in this sector participated in the project. The method used to do this analysis was the personal interviews of the people aformentioned. Their experience and support are the best guarantee to present this analysis and the measures and proposals needed to achieve the excellence of Sevillian hotels in the future

Study and Design of a Diferentially Fed Tapered Slot Antenna Array

The results of a parametric study and design of an ultrawideband dual-polarized array of differentially-fed tapered slot antenna elements are presented. We examine arrays of bunny-ear antennas and discuss the capabilities and limitations of differential antenna technology. As we focus on radio astronomical applications, the absence of a balancing-feed circuit not only reduces the first-stage noise contribution associated to losses in the feed, but also leads to a cost reduction. Common-modes are supported by the antenna structure when a third conductor is present, such as a ground plane. We demonstrate that anomalies may occur in the differential-mode scan impedance. Knowledge of both types of scan impedances, differential and common mode, is required to properly design differential LNAs and to achieve optimal receiver sensitivity. A compromise solution is proposed based on the partial suppression of the undesired common-mode currents through a (low loss) balancing-dissipation technique. A fully steerable design up to 45?? in both principal planes is achieved

Quality in Blended Learning in Higher Education. A proposal for an Evaluation Model.

This paper presents an analysis of different models used to assess the quality of formative actions, considering classroom learning and distance education courses. Taking as starting point one of the analyzed models, the paper sets out the necessity of developing a new model that could measure the quality of a blended formation process, by selecting the applicable indicators and proposing some new. The model is composed of seven different categories, which include a sum of thirty five indicators. They will be used to represent courses quality level in Kiviat?s diagrams. This model is currently being put into practice in a real university environment

La piel, la membrana

En el hecho de la vanguardia resulta, dada la escasez de perspectiva, muy difícil el aislar los proyectos por corrientes o tendencias, sin embargo hay circunstancias comunes a todos los proyectos. La división formal y conceptual entre fachada y, diga-mos, resto del proyecto funciona perfectamente cuando se trabaja según los cá-nones morfológicos y compositivos considerados como clásicos o estándares, pero en los proyectos que vemos continuamente reflejados en las últimas publicaciones no siempre son estos los criterios predominantes a la hora de componer un edificio pues, en muchos casos, la fachada se ha extendido a todo el edificio sin solución de conti-nuidad, los suelos son al mismo tiempo paredes y luego techos y los exteriores son interiores. El concepto de fachada se hace pues extensible al concepto de imagen total pasando a ser un concepto meramente teórico que engloba la totalidad del edificio.In the case of avant-garde it is, considering the lack of perspective, very difficult to categorize projects by currents or trends. However there are common circumstances to all projects. The formal and conceptual division between facade and, we could say, the rest of the project works perfectly when understood according to the morphological and compositional canons regarded as classics or standard. Nevertheless in the projects continually reflected in recent publications those prevailing criteria are not always present when composing a building. Now days in many cases we can see how the facade has been extended to the entire building seamlessly, the floors are, at same time, walls and ceilings and the exteriors are also interiors. The facade concept has been extended to the concept of total image, consequently becoming a purely theoretical concept that encompasses the entire building

ACE 16k based stand-alone system for real-time pre-processing tasks

This paper describes the design of a programmable stand-alone system for real time vision pre-processing tasks. The system's architecture has been implemented and tested using an ACE16k chip and a Xilinx xc4028xl FPGA. The ACE16k chip consists basically of an array of 128×128 identical mixed-signal processing units, locally interacting, which operate in accordance with single instruction multiple data (SIMD) computing architectures and has been designed for high speed image pre-processing tasks requiring moderate accuracy levels (7 bits). The input images are acquired using the optical input capabilities of the ACE16k chip, and after being processed according to a programmed algorithm, the images are represented at real time on a TFT screen. The system is designed to store and run different algorithms and to allow changes and improvements. Its main board includes a digital core, implemented on a Xilinx 4028 Series FPGA, which comprises a custom programmable Control Unit, a digital monochrome PAL video generator and an image memory selector. Video SRAM chips are included to store and access images processed by the ACE16k. Two daughter boards hold the program SRAM and a video DAC-mixer card is used to generate composite analog video signal.European Commission IST2001 – 38097Ministerio de Ciencia y Tecnología TIC2003 – 09817- C02 – 01Office of Naval Research (USA) N00014021088

An Industrial Automation Course: Common Infrastructure for Physical, Virtual and Remote Laboratories for PLC Programming

This work describes the development of a teaching strategy to leverage current simulation tools and promote learning of industrial automation systems. Specifically, Programmable Logic Controller (PLC) programming in an industrial automation course. We propose an infrastructure where it is possible to work with physical, virtual and mixed laboratories

Production of Transglutaminase by Streptoverticillium ladakanum NRRL-3191 Grown on Media Made from Hydrolysates of Sorghum Straw

The aim of this work was to elucidate the suitability of the biotechnological production of transglutaminase by Streptoverticillium ladakanum NRRL-3191 grown on media made from hydrolysates of sorghum straw. Transglutaminase activity was determined in fermentations on sorghum straw hydrolysates and commercial xylose with initial xylose 10, 20 or 30 g/L. Using media containing commercial xylose 20 g/L, transglutaminase activity up to 0.282 U/mL was obtained in 96 h. Using neutralized, charcoal-treated hydrolysates of sorghum straw with xylose 30 g/L sterilized in autoclave at 121 °C, up to 0.155 U/mL was obtained in 96 h. However, when the sterilization was performed by filtration, using the same hydrolysates with xylose 20 g/L, up to 0.348 U/mL was obtained in 72 h. It was demonstrated that hydrolysates of sorghum straw are suitable media for transglutaminase production by Streptoverticillium ladakanum

Production of Transglutaminase by Streptoverticillium ladakanum NRRL-3191 Grown on Media Made from Hydrolysates of Sorghum Straw

The aim of this work was to elucidate the suitability of the biotechnological production of transglutaminase by Streptoverticillium ladakanum NRRL-3191 grown on media made from hydrolysates of sorghum straw. Transglutaminase activity was determined in fermentations on sorghum straw hydrolysates and commercial xylose with initial xylose 10, 20 or 30 g/L. Using media containing commercial xylose 20 g/L, transglutaminase activity up to 0.282 U/mL was obtained in 96 h. Using neutralized, charcoal-treated hydrolysates of sorghum straw with xylose 30 g/L sterilized in autoclave at 121 °C, up to 0.155 U/mL was obtained in 96 h. However, when the sterilization was performed by filtration, using the same hydrolysates with xylose 20 g/L, up to 0.348 U/mL was obtained in 72 h. It was demonstrated that hydrolysates of sorghum straw are suitable media for transglutaminase production by Streptoverticillium ladakanum