Abstract:
In today’s highly industrialized world, everything is run by machines so the market is flooded with millions of products by thousands of vendors. This gives rise to issues with compatibility when using products from different vendors. Hence there is a need for a centralized system to efficiently manage and control equipment from various vendors.
We have implemented a Building Management System based on the MODBUS TCP protocol. This BMS is a customer/server-based control framework introduced in structures that controls and screens the building's mechanical and electrical supplies, for example, building lights, force frameworks, fire frameworks, and security systems. ModBus was first published by Modicon (now Schneider Electric) in 1979. MODBUS TCP is not only royalty-free. It has now become a de facto standard communication protocol and now it offers interoperability and compatibility among different vendors' devices. Our BMS has been implemented using master/slave architecture. The master device consists of an Arduino Mega board with an embedded webpage. This board is connected via Ethernet to a router. The router in-turn is connected to the internet as well as to slave devices. The slave devices are Arduino Uno boards that have sensors and actuators connected to them. These sensors record changes in the environment which are then sent back to the master, some of which are displayed on the webpage. The actuators come into action when either a preset threshold value is reached or when it receives an override from the master. The webpage is online i.e. it is accessible through the internet, it can be used both for monitoring as well as controlling the BMS. Access to the webpage is limited by authentication implemented through an ID and password .Each user has a unique ID and password that must be entered to view the webpage.
