Improvement of PLC control system using microcontroller

U ovome završnom radu opisana je povijest i razvoj samog PLC (eng. Programmable logic controller) uređaja, njegov način rada te logičko upravljanje putem programskog okruženja. Kao primjer prikazuje se FX1N-32MR Mitsubishi PLC kojeg je potrebno u MELSOFT programskom okruženju logički programirati i povezati s računalom putem RS232 serijske komunikacije. Uz logičko upravljanje tzv. ljestvičastim dijagramom (eng. Ladder Diagram, LD) izrađuje se vizualizacija s omogućenim upravljanjem u SIMATIC WinCC razvojnom okruženju. PLC uređaj se povezuje sa vizualizacijskim alatom putem MX OPC (eng. Mitsubishi O/I Process Control) servera. Unutar servera se definiraju ulazi i izlazi PLC uređaja, gdje se kasnije može putem OPC (eng. O/I Process Control) drivera u WinCC-u učitati taj server sa ulazno-izlaznim parametrima PLC-a prethodno definiranog u MX OPC (eng. Mitsubishi O/I Process Control) serveru. Opisuje se analiza te kvaliteta uspostavljanja i dohvata podataka, odnosno upravljanja putem WinCC-a uz simulaciju procesa u realnom okruženju sa vizualizacijom. Govori se o prednostima te nedostacima takvog sustava i koliko je način komunikacije uistinu važan. Opisuje se upravljanje pomoću razvojnog okruženja ESP-WROOM-32 mikrokontrolera, pri čemu se izrađuje programsko rješenje za upravljanje i dohvat podataka od strane PLC uređaja. Takvo okruženje predstavlja današnji moderni pristup, kojim je moguće upravljati gotovo u realnom vremenu. Razmatra se sigurnost protok podataka te kvaliteta i sigurnost upravljanja takvim sustavom. Izrađena je maketa idejnog rješenja u laboratorijskim uvjetima kroz rad PLC-a FX1N-32MR i paralelnim radom razvojnog okruženja ESP-WROOM-32 mikrokontrolera za upravljanje putem WiFi-a uz prikazanu vizualizaciju izrađenom u SIMATIC WinCC-u. Simulacijom rada sustava analiziraju se prednosti i nedostaci te donosi zaključak.In this graduate thesis is description about history and development of the PLC device, his proceedings and logical management through the software systems. It is show as an example of the FX1N-32MR Mitsubishi PLC whic is necessary programmed in MELSOFT software system and connect to computer by RS232 serial communication. By the logical management so called „The ladder diagram“ (eng. Ladder Diagram, LD) developed visualization with additional, enable contron in the SIMATIC WinCC visual tools. PLC device is connected to visualization tool by the MX OPC (Mitsubishi O / I Process Control) server. Into the server, inputs and outputs of the PLC device are defined, where you can after defined load the server with the input-output parameters of the PLC previously defined in the MX OPC driver in WinCC. It is describe in the quality of establishment and retrieval of data WinCC, it can simulating process in real environment with visualization. Describes about advantages and disadvantages of such a system and how important the way of communication is. It describes the control how using the existing ESP-WROOM-32 microcontroller, where softwere solutions are developed for the management and retrieval of data by the PLC device. Such a system represented today’s modern access which operates almost in real time. There is tallking about the security flow of data and about security manegement such a system. By making an example of conceptual design in laboratory working conditions of the system PLC FX1N- 32MR with control and visualization by SIMATIC WinCC and Parallel operation existing ESPWROOM- 32 controller whic is controled by WiFi. The system simulation shows the advantages and disadvantages of the same and analyzes the management process