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Design of an HMI in Web Server of PLC’s S7 12001500 for the Control of a Multivariable Process of a Didactic Module Design of an HMI in Web Server of PLC’s S7 12001500 for the Control of a aasdaMultivari.
Design of an HMI in Web Server of PLC’s S7-1200/1500 for the Control of a Multivariable Process of a Didactic Module Sánchez Oca Wilson1(&), Almache Barahona Verónica1(&), Salazar Jácome Elizabeth2(&), Freire Llerena Washington1(&), and Silva Monteros Marcelo1(&) Departamento de Eléctrica y Electrónica, Universidad de las Fuerzas Armadas ESPE, ID: 60104598, Latacunga, Ecuador {wesanchez,wrfreire,cmsilva}@espe.edu.ec, vecarito@hotmail.com Departamento de Ciencias Exactas, Universidad de las Fuerzas Armadas ESPE, ID: 60104598, Latacunga, Ecuador mesalzar2@espe.edu.ec Abstract The present project consists of the design of a web page for the monitoring and control of a Profinet network of a multivariate process and the proportional hydraulic control of position of a didactic module controlled by a S7-1200 PLC and the second didactic module controlled with a PLC S7-1500, these programmable PLCs were used as a WEB server and to store the different web pages created by the user, allows to use any HTML text editor for processing In this case we used an AWP language and JavaScript that is a language similar to the C language that allows to change images, make animations, etc In addition, this control alternative minimizes the costs in its elaboration when using computer tools with free software, allows better control and supervision of each of the industrial process stations with efficient and secure WEB server Keywords: Web server HMI Á HTML language Á Industrial processes Introduction The Web Server is a technological tool that is incorporated into the PLC’s and creates a connection with the WEB, in this way it seeks to improve the supervision and control of the processes in execution [1] This Web technology helps in automation, providing safer supervision with greater reliability, through a dynamic and interactive HMI design for students [2], having two modules with different PLC’s identifies the shortcomings that exist in these controllers for HMI design in the case of S7 1200 there is a limited memory space for which a simple WEB design is made but maintaining the necessary dynamics of the process and control of variables [3], The S7 1500 has a larger memory space, allowing for better WEB design and a more dynamic and interactive HMI [4] © Springer International Publishing AG, part of Springer Nature 2018 Á Rocha et al (Eds.): WorldCIST'18 2018, AISC 746, pp 248–256, 2018 https://doi.org/10.1007/978-3-319-77712-2_24 Design of an HMI in Web Server of PLC’s S7-1200/1500 249 In order to access this tool, we must follow a series of sequential steps to activate it [5], once the communication of the CPU with the WEB has been established by means of the WWW instruction implemented within the programming of each process [6], with these modifications and the IP address of the CPU has been established, the SIMATIC S7 is already accessed in the browser This HMI design makes use of free software tools for the generation of code in HTML, Javascript, and AWP language that is characteristic of Siemens, this last one is which allows us to establish communication with the process variables of each module, these lines of code will be visualized in the browser Siemens’ web server is not a substitute for its WINCC [7] SCADA software, but if it has several limitations, taking as an example a simple SCADA software system, it takes a few steps, while using the web server would involve adding a large amount of code [8], and this must be downloaded to the PLC which is limited by the internal memory, although it is possible to expand that memory, when executing numerous tasks it would damage performance General Description These programmable logic controllers offer a tool that takes advantage of the benefits of the Internet, such as the Web Server application, by using this application it is possible to access the SIMATIC S7 [9] online portal from anywhere where the user can control and monitor the long-distance processes of the didactic module WEB Server in PLC’s S7 The web server allows the PLC data to be presented as HTML (or XML) pages [10], giving access through the standard internet browser Modern automation techniques [11], integrates this technology with the Internet that allows direct access to the installation via Intranet/Internet using transparent Ethernetbased communication During the test and commissioning phase, the aim is to flexibly access the PLC’s CPU and display individual data during browser operation; the most logical approach is to use existing standards for intranet or Internet access, such as HTTP technology [12], standard web browsers or widely used “languages” such as JavaScript [13] Translated with www.DeepL.com/Translator SIMATIC S7 The Simatic S7 wide range of technical features, including the following: • • • • High processing capacity 64-bit calculation Integrated Ethernet/PROFINET interface [14] Integrated analogue inputs [15] Function blocks for axis control according to PLC open [15] Programming using the STEP Basic v13 [16] software tool for configuring and programming not only the S7-1200, but also the Simatic Basic Panels [15] in an integrated way 250 S O Wilson et al Case Study The PLC S7 1200/1500 PLCs are suitable for reading and writing variables via the Internet, through web pages created by the user is possible to access and establish control of process variables, which are programmed through computer tools with free software, the use of this technological tool Web Server allows us to identify the status of PLC variables, through a predefined address or variable designation, which are stored within the PLC memory, for monitoring and control of physical signals coming from level, flow, pressure, position and actuators such as variable speed drives and proportional hydraulic valves WEB Server Enabling To carry out this type of operation, TIA PORTAL V13 software is necessary This software allows to maintain and establish communication and programming of these equipment that are integrated to the SIEMENS mark, in the tree of the PLC project selected in its properties, we enable the WEB server as shown in Fig Fig Activating WEB server in PLC S7 1200 Creation of User-Defined WEB Pages Once the PLC web server S7 1200/1500 has been activated, it is possible to design web pages using an HTML editor, commands in AWP language [17] which must be loaded into the PLC, this web page will serve to interact between the user and the PLC This process includes several tasks that are detailed below and a diagram is shown in Fig 2: Configuration in the WEB server of the S7 1200/1500 PLCs to read and process HTML pages Include the WWW command within the programming Enter AWP tags in HTML code, these AWP commands are a fixed set of programming lines Block generation from HTML web page Compile and load the blocks into the PLC Access the user-defined web page from a PC or mobile device Design of an HMI in Web Server of PLC’s S7-1200/1500 251 Fig User-defined web page structure Deploying Libraries in JavaScript There is the possibility of adding dynamic graphic elements [18], in which it is possible to visualize the values of the variables in execution by means of color indicators or animations with measurement scales as programmed, for which it is necessary to write lines of HTML code indicated and add these libraries of each element within the main folder, but the more code you enter, the more blocks of data will be necessary and these are limited to the PLC memory JavaScript libraries are required to dynamize and display the variables in real time according to the way the process is executed [13] Meters and displays are designed within HTML code through color matching pixel control and implementation of a measurement scale [10] Access to SIMATIC S7 To access the SIM ATIC S7, proceed as follows: • Check that the PLC S7 and PC are within a common Ethernet network or are directly interconnected with a standard Ethernet cable • Open web browser and enter the IP address of the configured S7 CPU 252 S O Wilson et al Results Once the design and implementation has been completed, the WEB pages created by the user, the WEB server enablement, the Wireless [19] network configuration and adaptation to mobile devices, are started with the testing of on and off and reading of the variables in the browser and verify the operation of the processes by designing the HMI of each project Control of the PLC Module Elements S7 1200 Previously loaded programming in the process controlled by the Profinet network [20] established, the communication test of sending data to the digital outputs on and off for the control of the hydraulic pump is displayed, the data transmission is done by means of the WEB page as show in Figs and shows the PID control [21] of level with a set point of value 5, in the curve, the green line shows the value of the set point and the blue line shows the process variable Fig Control on/off hydraulic pump Fig PID Level Control Design of an HMI in Web Server of PLC’s S7-1200/1500 253 Reading of Level and Flow Sensor Variables The data supplied by the sensors, the level (0–10) L and the flow rate of (150–400) L/h, are displayed Figure shows an example of the reading of the two variables; the WEB page shows a reading of 3.802 L and 406.4811 L/h of the didactic module, in real time (Fig 6) Fig Flow and level measurement in the web server and industrial process Fig Level measurement Control of the PLC Module Elements S7 1500 Data is sent to the digital outputs for switching on and off to establish control of the Festo hydraulic drive system [22], which is controlled via the WEB page This page is also designed with links to each of the proportional position and pressure control processes as shown in Fig 8, the set point value is entered and both the cylinder and the hydraulic motor reach the desired values, the animation of variables is shown in Fig 7, Fig shows the pressure control where we activate and deactivate the hydraulic pump and the meter shows the reading of the pressure variable in real time 254 S O Wilson et al Fig Hydraulic drive system on/off control Fig Proportional control of position and pressure Conclusions • The web page was designed using HTML programming, taking into consideration the standards, details and requirements required by the industrial process • The website was designed to control and monitor the different PLC variables wirelessly from a Smartphone or Tablet, as long as they have Internet access • The SERVER WEB option of each Siemens PLC was enabled to be used as servers and it is possible to access the user wirelessly by specifying the IP address corresponding to each didactic module to be controlled • The PLC was programmed using the AWP language where the communication was established • The control and monitoring of the variables of each didactic module was carried out through the web page designed in such a way that it is user-friendly and taking into account the corresponding security The website allows to visualize the inputs and outputs variables in real time and intuitively select the individual operation of each process Design of an HMI in Web Server of PLC’s S7-1200/1500 255 Limitations of Research and Future Work • Before starting a WEB project it is essential to have a basic knowledge in the management of software for HTML code and JavaScript, these are the computer tools to give dynamics and control of style to the WEB page • In addition, the limitation represented by the s7 CPU memory according to its capacity must be taken into consideration • Developing this type of projects in the future opens the possibility of creating more sophisticated WEB applications in industrial plants with greater complexity in which information from various types of processes is handled, thus creating remote control solutions in industry or any other area, presenting an economic saving and real time control and monitoring without the need to be present the operator References Lisa Ollinger, A.A.: SOA-PLC-dynamic generation and deployment of web services on a programmable logic controller IFAC Proc 47(3), 2622–2627 (2014) Bayrak, G.: An automation platform designs for electrical and electronics students: an application study Procedia 47(3), 950–955 (2012) Lakshmi Sangeetha, B.N.A.: Experimental validation of PID based cascade control system through SCADA–PLC–OPC and internet architectures Measurement 45(4), 643–649 (2012) Mathias Oppelt, G.W.: Automatic model generation for virtual commissioning based on plant engineering data IFAC 47, 24–29 (2014) SIEMENS: Potencia+eficiencia: SIMATIC S7-1500 plus TIA Portal, S7-1500 (2015) http:// w5.siemens.com/spain/web/es/industry/automatizacion/simatic/controladores_modulares/ controlador_avanzado/s71500/pages/default.aspx Último acceso 30 Oct 2017 AIISAS: Automatizacion Industrial inteligente, AII (2016) http://aiisas.com.co/web-server/ Último acceso 29 Oct 2017 SIEMENS: Simatic 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Último acceso 28 Sept 2017 13 Javascript: Las mejores librerias Javascript, github, 06 Apr 2017 https://frostqui.github.io/ mejores-librerias-javascript-2017 Último acceso 15 Sept 2017 256 S O Wilson et al 14 Siemens AG: PROFINET, SIEMENS (2017) http://w3.siemens.com/mcms/automation/es/ industrial-communications/profinet/pages/default.aspx Último acceso 29 Oct 2017 15 Siemens.com: SIMATIC S7-1200, Siemens (2017) http://w5.siemens.com/spain/web/es/ industry/automatizacion/simatic/controladores_modulares/controlador_basico_s71200/pages/ s7-1200.aspx Último acceso 15 Oct 2017 16 Industry Support Siemens: SIMATIC STEP Basic, TIA Portal, 11 May 2015 https:// support.industry.siemens.com/cs/…/STEP_7_Basic_V13_1_esES_es-ES.pdf Último acceso 25 Sept 2017 17 Industry Support Siemens: Servidor WEB, Comandos AWP, December 2014 https://cache industry.siemens.com/dl/files/560/59193560/att_109205/v1/s71500_webserver_function_ manual_es-ES_es-ES.pdf Último acceso 15 Sept 2017 18 Nieto, A.: jQuery Visualize, gráficas canvas y Javascript, anieto2k (2017) http://www anieto2k.com/2009/07/07/jquery-visualize-graficas-con-canvas-y-javascript/ Último acceso 30 June 2017 19 tp-link: Configurar router TP-Link, tp-link (2017) http://www.tp-link.com/pe/faq-417.html Último acceso 29 Oct 2017 20 Pablo Muñoz, C.P.: Repositorio Institucional de la Universidad de las Fuerzas Armadas ESPE, 19 August 2016 https://repositorio.espe.edu.ec/handle/21000/11939 Último acceso 25 Oct 2017 21 Wikispaces: CONTROL PID, METODOLOGÍA Y APLICACIONES (2014) http://controlpid.wikispaces.com Último acceso 30 Oct 2017 22 Edwin Huilcamaigua, L.V.: Repositorio Institucional de la Universidad de las Fuerzas Armadas ESPE, 12 July 2016 https://repositorio.espe.edu.ec/handle/21000/11929 Último acceso 29 Oct 2017 ... (0–10) L and the flow rate of (150–400) L/h, are displayed Figure shows an example of the reading of the two variables; the WEB page shows a reading of 3.802 L and 406.4811 L/h of the didactic module, ... • The PLC was programmed using the AWP language where the communication was established • The control and monitoring of the variables of each didactic module was carried out through the web page... user, the WEB server enablement, the Wireless [19] network configuration and adaptation to mobile devices, are started with the testing of on and off and reading of the variables in the browser and