Journal on Processing and Energy in Agriculture 14 (2010) 2 109 Biblid: 1821-4487 (2010) 14; 2; p.109-111 Paper UDK: 65.012.7:681.51 Stručni rad THE PRACTICAL EXAMPLE OF CONNECTING THE PLANT PROCESSING INDUSTRY INTO A SINGLE SUPERVISORY AND CONTROL SYSTEM PRAKTIČNI PRIMER POVEZIVANJA POGONA PROCESNE INDUSTRIJE U JEDINSTVENI NADZORNO UPRAVLJAČKI SISTEM Perica NIKOLIĆ, Vladimir BUGARSKI, Filip KULIĆ, Đura OROS Faculty of Technical Sciences, 21000 Novi Sad, Trg Dositeja Obradovića 6, Serbia e-mail: npero@uns.ac.rs ABSTRACT This paper describes the connecting of different plants within the processing industry using modern technologies. The basic idea is to show the ability of linking different manufacturer’s equipment into a single supervisory system. The contemporary manufactur- ing requires modern solutions in the field of supervision and management so as to increase the efficiency and reduce the production costs of the final product. The connectivity solution shown in this paper is in line with modern trends and demands of the real produc- tion process. The described system was practically implemented in the plant using the internationally standardized communication media and protocols. The practical implementation provided users with a better insight into the production process by providing a number of possibilities for data collecting and analysis. Key words: communication, process industry, connecting, supervision and control. REZIME U radu je prikazano povezivanje različitih pogona u procesnoj industriji korišćenjem savremenih komunikacionih tehnologija. Osnovna ideja je bila da se prikaže mogućnost povezivanja opreme različitih proizvođača u jedinstveni nadzorno upravljački sistem. Današnja proizvodnja zahteva savremena rešenja u oblasti nadzora i upravljanja radi povećanja efikasnosti proizvodnje i smanjenja troškova finalnog proizvoda. Prikazano rešenje povezivanja je u skladu sa savremenim trendovima i realnim zahtevima proizvodnih procesa. Opisani sistem je praktično realizovan korišćenjem međunarodno standardizovanih komunikacionih medija i protokola. Iskorišćene su standardne široko dostupne komunikacione tehnologije za povezivanje opreme i uređaja u okviru pogona, povezivanje se sastoji od nekoliko nivoa hijerahije. Osnovni, nulti nivo je nivo senzora i izvršnih organa, prvi nivo je nivo na kom se nalaze dis- tribuirane periferije PLC uređaja. Na drugom nivou se nalaze PLC uređaji, treći nivo je na kome se nalazi nadzorni sistem. Prak- tična realizacija je omogućila bolji uvid u proizvodni proces obezbeđujući veći broj podataka i mogućnosti njihove analize. Prika- zano rešenje je danas vrlo lako moguće primeniti na širok spektar već postojećih realizovanih savremenih upravljačkih sistema do- davanjem potrebnih proširenja i kreiranjem komunikacione mreže. Osnovna ideja ovog rada je povezivanje svih proizvodnih pogona u okviru fabričkog postrojenja. U datoj realizaciji povezana su samo postrojenja u okviru iste zgrade dok je ostalo da se realizuje i povezivanje svih ostalih pogona. Ključne reči: komunikacija, procesna industrija, povezivanje, nadzor i upravljanje. INTRODUCTION The modern industrial production requires modern solutions in the areas of supervision and control. The competition in the market and reducing costs of production require the use of mod- ern solutions, which include efficiently and cost-effective energy production. In order to achieve these goals it is necessary to ap- ply generally accepted and standardized solutions that exist on the market. Today, a special area in the automation of industrial plants is the application of various communication solutions. Because of the production process requirements, nowadays it is very easy to find the application of contemporary communica- tion solutions. Of course, the use of generally accepted interna- tional standardized solutions enables the interconnection of equipment from different manufacturers. In this way, the produc- tion processes, which consist of many different technical and independent entities, can be circled in a single supervisory and control system. MATERIAL This paper will present the interconnectivity and integration of equipment from different manufacturers using a standard in- dustrial communication protocols. All solutions are applied prac- tically in the real industrial processes. The basic idea is to inte- grate a number of machines, which existed as separate units, into a single supervisory and control system. The connecting stan- dard, widely available in communication technologies for con- necting machines within the plant, consists of several levels of hierarchy. The basic level is the level sensor and actuators, the next level is the level on which the peripheral PLC (Programma- ble Logic Controller) devices (Bolton, 2006) are distributed. The PLC devices are at the next level and the supervisory system is at the third level. Figure 1. shows the standard commonly known structure with levels of control and supervision in the industrial plant. Each level uses the appropriate standard of communica- tion adapted to its speed and medium specified level of man- agement. The distance, speed, responsiveness and size of data to be exchanged are depending on the level and characterize each of communication levels, i.e. determine the characteristics of the communication protocol needed (Klaus Bender, 1993). DISCUSSION The practical implementation sensors and actuators are con- nected in the traditional way using current and voltage signals. This is the zero level. The level one where the distributed pe- ripherals belonging to each individual PLC controllers include: frequency converters, measurements devices for electrical net- works and distributed peripherals. This requires expansion of the basic PLC module. At this level each PLC has its own independ- ent distributed periphery (DP). In the given implementation DP