Automation of line model for sorting by sample color using programmable logic controller S7-1500 in programming language SCL

Automatizacija modela linije za sortiranje po boji uzorka ostvarena je korištenjem programibilnog logičkog kontrolera Siemens SIMATIC S7 serije 1500. Sortiranje se obavlja na maketi pokretne trake. Model sadrži pokretnu traku pogonjenu istosmjernim motorom, kompresor i pneumatske cilindre za ubacivanje predmeta na odgovarajuće mjesto te razne senzore. U radu se opisuje princip rada PLC-a, modula ulaza i izlaza, memorije, programskih jezika kojima se izrađuje kod za PLC te komunikacijski sustav PLC-HMI. Navedeni su detaljni opisi korištenih modula, njihovih uzlaznih i izlaznih adresa te PLC i HMI tag-ova. Projekt je razvijen u razvojnom programskom okruženju TIA Portal, a za izradu operatorskog sučelja korišten je alat WinCC integriran u isto okruženje. Kod je napisan u programskom jeziku SCL (Structured Control Language). Za detekciju boje korišten je foto-detektor ugrađen u model linije za sortiranje. U automatskom načinu rada zahtjev je bio sortirati predmete po njihovoj boji i posložiti ih na odgovarajuća mjesta na maketi. Redoslijed boja zadan je unaprijed: zeleni predmet, bijeli predmet, plavi predmet. Implementirana je mogućnost ručnog načina rada u kojem se predmeti slažu proizvoljno po želji operatera. Procesom se upravlja putem HMI panela simuliranog na računalu u alatu WinCC runtime. Položaj i boja predmeta prikazuju se na zaslonu prilikom sortiranja. Implementirane su standardne indikacije i informacije o trenutnom načinu rada, stanju pokretne trake, stanju pneumatskih cilindara te tipka za zaustavljanje postrojenja u slučaju nužde.Line model for colour sorting was automated using the Siemens SIMATIC S7 Series 1500 programmable logic controller. The sorting is performed on the model with conveyor. The model includes a conveyor driven by a DC motor, a compressor, pneumatic pistons and various sensors. This thesis describes the principle of PLC operation, input and output modules, memory, programming languages for PLC coding and PLC-HMI communication systems. Detailed description of used modules is provided, along with their input and output addresses. The project was developed in the integrated development environment TIA Portal. WinCC tool used for creation of user interface is integrated in TIA Portal. The program code is written in the SCL (Structured Control Language) programming language. Model has it’s own photo-sensor for color detection installed near beginning of conveyor. In automatic mode, objects are sorted into slots in predefined order. The order of colours is defined in code: green object, white object and blue object. In manual mode, user has choice of sorting objects in arbitrary order. The process is supervised via the WinCC runtime tool simulated on the PC. Depending on the position and color of a particular object, it’s image appears on the HMI screen. Standard indications and information are displayed via HMI panel : mode of operation, conveyor status, pneumatic pistons status and compressor status along with emergency stop button