The diploma thesis deals with installation and operation of the building automation system (BAS) at the Faculty of Medicine in Ljubljana. A BAS connects the general ventilation system and ventilation of clean rooms, heating and cooling, lighting, measuring the power consumption and connecting the unlocking system of the interlock doors. The thesis describes particular systems of various manufacturers, which are connected to a common communication network LON.
In practice, business premises require a system that allows easier and more efficient maintenance, while allowing comfortable use of premises for the users. For this purpose, we developed a functional and user-friendly control system SCADA (Supervisory Control And Data Acquisition) according to the given requirements of engineering. The system serves as a graphical interface between LON network and the user, and allows the user to monitor performance and history of operation and parameter setting of each part of the system.
The objective is to present LON technology, emphasize important processes of network integration with the program LonMaker, to describe the program TAC Graphic Editor for designing the SCADA graphical interface and to describe the functioning of the BAS.
As a third year student, I conducted a three-month practical training in the company Silon d.o.o. The companies is involved in consulting, engineering and launching systems in the field of building automation and energy savings . Towards the end of 2014 the company began setting up a BAS at the Faculty of Medicine in Ljubljana. I had the opportunity to monitor the implementation of the project from the very beginning: from drawing plans for the electrical cabinets, construction, connecting devices to the network and writing programs for the operation of PLCs (programmable logic controllers) to finally handing over the project. Because of the project's complexity, setting up of the BAS was taken over by my colleagues with extensive experience in the field. My job was to connect devices to LON network and to ensure electrical connection of the PLCs in the electrical cabinets. I also took part in the integrating phase of the network. I had to locate and resolve the faults caused by improper electrical connections made by the electricians. When the devices were connected to the LON network and when the operation of PLCs was programmed, I went over the operation of the equipment and eliminated any errors.