RACHMAN, AVIP (2025) IMPLEMENTASI SISTEM DISTRIBUSI POMPA AIR DENGAN ALGORITMA FIRST IN FIRST OUT UNTUK MULTI USERS BERBASIS PLC FX1N-24MR DAN HMI HAIWELL C7S. S1 thesis, Universitas Mercu Buana Jakarta.
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Abstract
Water is a vital resource that cannot be separated from human life and is utilized in various daily activities. As water demand continues to increase in residential areas, particularly in distribution systems that rely on a single water source to serve multiple users, several problems often arise, such as long tank filling queues, manual pump operation, energy wastage, and inefficient user time management. Based on these issues, this study aims to design and implement an integrated water distribution system using a single water pump based on a Programmable Logic Controller (PLC) with the application of the First In First Out (FIFO) scheduling algorithm to regulate the tank filling sequence automatically, orderly, and fairly for each user. The system was designed using a PLC FX1N-24MR as the main controller, water level sensors (float switches) to detect tank conditions, solenoid valves to regulate water distribution paths to each user, and a Haiwell C7S Human Machine Interface (HMI) as a monitoring and control interface. The FIFO algorithm was implemented to record and manage the filling request sequence based on arrival time, while an interlock system was applied to prevent conflicts among users, ensuring that the filling process operates safely and in a controlled manner. System testing was carried out through simulations of water filling requests by three users under several scenarios, including single-user operation, sequential multiuser operation, and simultaneous input conditions. The results of the FIFO algorithm testing show that the system is able to serve user requests according to their order of arrival with reliable performance, without any conflicts in the operation of the pump and solenoid valves. The system response test indicates an average response time of approximately 0.33 seconds within one PLC operating cycle. Actuator testing shows that the solenoid valves operate at an average voltage of 232 V when activated, while the pump motor current ranges from 0.1 to 0.2 A. Furthermore, HMI testing demonstrates that the displayed information is consistent with the actual system conditions, allowing the system to be monitored in real time and to operate stably throughout the testing process. Keywords: Water Distribution System, PLC, FIFO, Water pump, HMI Air merupakan unsur vital yang tidak dapat dipisahkan dari kehidupan manusia dan digunakan dalam berbagai aktivitas sehari-hari. Seiring meningkatnya kebutuhan air pada kawasan hunian, khususnya pada sistem distribusi yang menggunakan satu sumber air untuk melayani banyak pengguna, sering muncul permasalahan seperti antrian pengisian tandon, pengoperasian pompa yang masih manual, pemborosan energi, serta ketidakefisienan waktu pengguna. Berdasarkan permasalahan tersebut, penelitian ini bertujuan untuk merancang dan mengimplementasikan sistem distribusi air terintegrasi menggunakan satu pompa air berbasis Programmable Logic Controller (PLC) dengan penerapan algoritma penjadwalan First In First Out (FIFO) guna mengatur urutan pengisian tandon secara otomatis, teratur, dan adil bagi setiap pengguna. Perancangan sistem dilakukan dengan menggunakan PLC FX1N-24MR sebagai pengendali utama, sensor water level (float switch) untuk mendeteksi kondisi tandon, solenoid valve sebagai pengatur jalur distribusi air ke masing-masing pengguna, serta Human Machine Interface Haiwell C7S (HMI) sebagai media monitoring dan kontrol sistem. Algoritma FIFO diterapkan untuk mencatat dan mengatur urutan permintaan pengisian berdasarkan waktu kedatangan, sementara sistem interlock digunakan untuk mencegah terjadinya konflik antar pengguna agar proses pengisian berlangsung secara aman dan terkontrol. Pengujian sistem dilakukan melalui simulasi permintaan pengisian air oleh tiga pengguna dengan beberapa skenario, meliputi single user, multi user berurutan, dan input bersamaan. Berdasarkan hasil pengujian algoritma FIFO. Sistem mampu melayani permintaan pengguna sesuai urutan kedatangan dengan keberhasilan sistem yang mumpuni tanpa terjadi konflik penggunaan pompa dan solenoid valve. Hasil pengujian respon sistem menunjukkan waktu respon rata-rata sebesar ±0,33 detik dalam satu siklus kerja PLC. Pengujian aktuator menunjukkan solenoid valve bekerja pada tegangan rata-rata 232 V saat aktif, sedangkan arus kerja motor pompa berada pada rentang 0,1–0,2 A. Selain itu, hasil pengujian HMI menunjukkan kesesuaian tampilan terhadap kondisi aktual sistem selaras, sehingga sistem mampu dimonitor secara real-time dan berjalan stabil selama pengujian. Kata Kunci: Sistem distribusi air, PLC, FIFO, Pompa air, HMI
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