TELECONTROL PLATFORM Telecontrol Platform for Industrial Installations Eduardo J. Moya, Oscar Calvo, José María Pérez, José Ramón Janeiro and David García Fundación CARTIF, Parque Tecnológico de Boecillo, Parcela 205, 47151 Boecillo, Valladolid, Spain Keywords: GSM modem, analogical modem, PLC, SCADA, monitoring, Industrial Process. Abstract: This article explains the telecontrol platform for industrial installations developed by CARTIF Foundation. Using this system it will be able to send control orders and receive notification of alarms from the PLC thanks to SMS (Short Messages System) messages which use GSM technology. In case of requiring a greater flow of data it will use telephone line combined with MODBUS protocol. All this will enable us to monitor and control any industrial installation with a very low cost. Copyright © 2007. 1 INTRODUCTION The possibility of remote connections with industrial processes can represent significant savings of time and money for companies. In fact, you can control and monitor equipments, update the software or locate faults regardless of equipment location with a simple remote connection. These monitoring tasks can be carried out with conventional technologies, as GSM network or switched telephone network, (International Engineering Consortium, 2007) which have been installed for many years. These systems are reappearing in industrial applications thanks to its low cost and the broad range of possibilities offered By using of these technologies (GeneralLynx, 2007), CARTIF Foundation has developed a monitoring system based on GSM modems and analogical ones that allow us to monitor and modify variables of processes controlled by SIEMENS S7- 200 automatisms. The article is organized as follows. In Section 2 we explain the first part of this project that consisted in creating a system capable of controlling and monitoring a process through SMS messaging. In Section 3 we expose the second part of this project. In this case we use an analogical modem to link PLC and SCADA. In Section 4 we will explain a practical case of the combined use of the library SMS and communication via RTC modem. Finally conclusions and open issues for future research are discussed in Section 5. 2 MONITORING OF PROCESSES USING GSM TECHNOLOGY In the case we're dealing with we’ll use the GSM network, which will allow us to send simple control commands between a cellular and a PLC from any place as long as we have enough coverage; this system requires only a GSM modem and a SIM card which are very cheap. In this section we’ll explain the library called SMS developed by CARTIF Foundation. This library has been developed to be used with a programmable Siemens PLC although similar developments can be performed to be used with other brands as Telemecanique, Omron or Allen- Bradley. 2.1 Elements of the System CARTIF Foundation uses mainly programmable PLCs of Siemens or Telemecanique. We decided to develop SMS library to be used with a low-mid range Siemens PLC. In this way, the automatism that has been selected is a S7-200. Developing this library for the S7-200, subsequent developments in other PLC´s will be able to be conducted in a very similar way. Besides that it will be needed a RS 232/PPI Multi-Master cable because the ports of Siemens S7- 200 series are RS-485 and GSM modems usually have RS-232. The third item of the system is a GSM modem. 81 J. Moya E., Calvo O., María Pérez J., Ramón Janeiro J. and García D. (2008). TELECONTROL PLATFORM - Telecontrol Platform for Industrial Installations. In Proceedings of the Fifth International Conference on Informatics in Control, Automation and Robotics - RA, pages 81-86 DOI: 10.5220/0001491300810086 Copyright c  SciTePress