Electronic Theses and Dissertation

Sistem distribusi air bersih di Bandara Sultan Iskandar Muda masih bergantung pada operasi manual, yang membatasi proses monitoring akibat ketiadaan data historis untuk analisis performa sistem dan meningkatkan risiko operasional seperti beban berlebih pada satu unit pompa serta potensi downtime, yaitu kondisi saat sistem distribusi tidak dapat berfungsi optimal akibat keterlambatan deteksi atau pengambilan keputusan. Penelitian ini bertujuan untuk merancang dan mengimplementasikan sistem distribusi air berbasis SCADA dengan konfigurasi kontrol open-loop yang terintegrasi ke jaringan Internet of Things (IoT), guna memantau performa pompa submersible, booster, dan sensor secara real time. Metode yang digunakan meliputi pemrograman PLC Outseal Mega V.2 dengan komunikasi Modbus RS-485 untuk kontrol pompa dan level air, serta penerapan protokol MQTT sebagai jalur komunikasi data yang terhubung ke platform Haiwell Cloud SCADA. Hasil menunjukkan bahwa sistem mampu beroperasi dengan stabil pada fitur utama seperti monitoring level air GWT dan rooftank, kontrol otomatis pompa, pencatatan data logging, serta pengiriman data ke broker MQTT secara real time. Sistem yang dirancang telah berfungsi sebagai solusi awal yang andal
dan adaptif untuk pemantauan distribusi air berbasis SCADA-IoT. Sistem ini telah berfungsi sebagai solusi awal yang andal dan adaptif untuk monitoring distribusi air berbasis SCADA-IoT, serta menjadi fondasi bagi pengembangan otomatisasi yang lebih presisi dan responsif terhadap dinamika sistem melalui dukungan perangkat instrumentasi skala industri di masa mendatang.

Kata kunci: SCADA, IoT, distribusi air, open loop, modbus RS-485, MQTT

The clean water distribution system at Sultan Iskandar Muda Airport still relies on manual operations, which limits the monitoring process due to the absence of historical data for system performance analysis and increases operational risks such as overloading a single pump unit and potential downtime, defined as a condition where the distribution system fails to operate optimally due to delayed detection or decision making. This study aims to design and implement a SCADA-based water distribution system with an open-loop control configuration integrated into the Internet of Things (IoT) network, in order to monitor the performance of submersible pumps, booster pumps, and sensors in real time. The method involves programming the Outseal Mega V.2 PLC with Modbus RS-485 communication for pump and water level control, and applying the MQTT protocol as a data communication channel connected to the Haiwell Cloud SCADA platform. The results show that the system operates stably in its core functions, including GWT and rooftop tank level monitoring, automatic pump control, data logging, and realtime data transmission to the MQTT broker. The system has proven to function as a reliable and adaptive initial solution for SCADA-IoT-based water distribution monitoring, and serves as a foundation for the future development of more precise and responsive automation supported by industrial-scale instrumentation. Keywords: SCADA, IoT, water distribution, open loop, modbus RS-485, MQTT