20.500.12556/RUL-83594 Uporaba varnostnih programirljivih logičnih krmilnikov v industriji Industrial applications of safety programmable logic controllers V nalogi je predstavljena problematika varnosti v industrijskih obratih in standardi (IEC 61508, IEC61511), ki to problematiko obravnavajo. Predstavljeni so tudi koraki za izboljšanje varnosti z uvedbo varnostnih (SIS) sistemov v skladu z veljavnimi standardi na tem področju. V okviru teh korakov je v nalogi poseben poudarek pri analizi tveganja in izbiri ter implementaciji varnostnih krmilnikov. Podan je pregled najbolj razširjenih varnostnih krmilnikov in primerjava s klasičnimi krmilniki. Predstavljeni so trije primeri iz prakse: - sistem zasilne zaustavitve obrata v procesni industriji (proizvodnja peroksida), ki je izveden še z ožičenim sistemom SIL 4. - v drugem primeru gre za uporabo programirljivega varnostnega releja podjetja Reer, ki je vgrajen na lesno obdelovalnem stroju. - v tretjem primeru gre za Siemens S7 315 F varnostni krmilnik, ki skrbi za hlajenje peči. Za drugi in tretji primer je prikazano in opisano tudi programersko okolje ReeR Mosaic in Step 7. Ob posameznih primerih sledi tudi osnovna razlaga parametrov in prikaz programiranja v konkretnem primeru. V zaključku so opisane tudi pozitivne in negativne izkušnje pri izvedbi predstavljenih projektov. Poskušali smo tudi opozoriti na določene probleme s katerimi se srečujemo inženirji ob izvedbi varnostno kritičnih projektov. This thesis presents safety problems in industrial plants, and standards (IEC 61508, IEC61511) that address safety issues. In addition the steps to improve safety by using safety systems (SIS) according to standards in this area are introduced. In the context of these steps special attention is focused on risk analysis, and selection and implementation of fail-safe systems. This is followed by an overview of the most common fail-safe controllers and their comparison with standard controllers. Three practical examples are introduced: 1. emergency shutdown systems (ESD) of the plant in the process industry (production of peroxide). Safety functions are »programmed« with wired system (SIL 4) 2. the use of programmable safety relay »Reer« that is built on woodworking machine 3. description of Siemens S7-315F safety controller that is responsible for furnace cooling The second and third example also include the description of their programming environments ReeR Mosaic and Step 7. Each individual example is followed by a basic explanation of its parameters and programming presentation. Thesis concludes with the description of positive and negative experiences during the implementation of the three projects (examples) that are presented in the thesis. The conclusion also points out some of the problems that engineers are facing with when working on safety-critical projects. SIL varnostni PLC varnost IEC 61508 IEC 61511 SIL Failsafe PLC Safety IEC 61508 IEC 61511 true false false Slovenski jezik Angleški jezik Diplomsko delo 2016-06-20 13:35:29 2016-06-20 13:35:31 2022-08-02 00:06:05 0000-00-00 00:00:00 2016 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 34559 Nikolic_Branko_-_Uporaba_varnostnih_programirljivih_logicnih_krmilnikov_v_industriji.pdf Nikolic_Branko_-_Uporaba_varnostnih_programirljivih_logicnih_krmilnikov_v_industriji.pdf 1 33F1DE5751A7BB3466D7A44F1F440CA3 44c92c28abc1bc4295d995e76bfa002f0e7e8f442532faee02c8f6be2f2da068 4f3b7320-a1ae-11eb-a523-00155dcfd717 20.500.12556/rul/516844f4-117c-4cc0-87dd-01172d163109 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=86613 Fakulteta za elektrotehniko 0 0 0