Building Automation System (BAS) merupakan salah satu penunjang kemoderenan manajemen bangunan. Salah satu utilitas dari BAS adalah sistem pengolahan air limbah atau Waste Water Treatment Plant (WWTP). Menjamurnya kegiatan perhotelan di daerah perkotaan mendorong banyaknya kadar air limbah yang dihasilkan sehingga diperlukan treatment agar air limbah itu tidak mengandung zat-zat yang dapat membahayakan jika dibuang ke lingkungan. Sistem BAS dibuat pada suatu konsul kendali dan plant pengolahan air limbah domestik di perhotelan dibuat dalam bentuk simulator. Sistem pengolahan air limbah pada konsul kendali dikendalikan oleh PLC merk Schneider TM221CE24R sebagai slave PLC yang mampu berintegrasi dengan master PLC dan HMI sebagai interface. Simulator sensor bekerja sesuai dengan karakteristik sensor asli sehingga simulator sistem pengolahan air limbah domestik perhotelan dapat dikendalikan pada konsul kendali dengan delay waktu komunikasi antara PLC dan HMI selama 0 ms. Konsul kendali dapat melakukan pengendalian level air pada tangki proses, pengkondisian pH, suhu, oksigen terlarut dan kekeruhan air agar air limbah sesuai standar baku mutu air limbah hotel yang ditentukan dan diatur oleh pemerintah. Kata Kunci: BAS, HMI, PLC, Waste Water Treatment Plant (WWTP).

Building Automation System (BAS) is one of the supporting modernity of building management. One of the utilities of BAS is Waste Water Treatment Plant (WWTP). The proliferation of hotel activities in urban areas encourages the amount of waste water level that is produced so the treatment is required so that the liquid does not contain harmful substances if it is directly disposed into the environment. In this study, BAS system is made in a control consul and the plant of waste water treatment that is made in this simulator. The system simulation uses PLC control device brand Schneider TM221CE24R as a PLC slave that is integrated with PLC master and HMI as the interface. The sensor simulator has worked according to the original sensor characteristics so that the system simulator of domestic waste water treatment in hotel can be controlled on the control consul with communication delay time between PLC and HMI for 0 ms. A control consul can control of water level in the process tank, pH conditioning, temperature, dissolved oxygen and water turbidity so that it is appropriate with the quality standard of the hotel's waste water that is determined and regulated by the government. Keywords: BAS, HMI, PLC, Waste Water Treatment Plant (WWTP).

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