IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308 _______________________________________________________________________________________ Volume: 06 Issue: 08 | Aug-2017, Available @ http://www.ijret.org 130 HVAC AND LIGHTING CONTROL USING PLC AND SCADA FOR INTEGRATED BUILDING MANAGEMENT SYSTEM Pooja Rajendra Varma 1 , Bhagsen J. Parvat 2 , V.K.Jadhav 3 1 Student, Department of Instrumentation and Control, PREC, Ahmednagar, MH, India 2 Professor, Department of Instrumentation and Control, PREC, Ahmednagar, MH, India 3 Assistant Professor, Department of Instrumentation and Control, PREC, Ahmednagar, MH, India Abstract Building Automation Systems (BAS) aims to improve efficiency, comfort, productivity, and the flexibility of buildings in the future. One of the major challenges in today’s society concerns the reduction in energy use and CO2 footprint in existing public buil dings without significant construction works. Building automation enhances protection and convenience. Benefits of using an advanced BAS includes Monitoring of several systems from one place, Interaction for more efficient control strategies, Remote service etc. Effective control of the heating, ventilation and air conditioning (HVAC) and lighting systems in a building is essential to provide a productive, healthy and safe working environment for the occupants. This paper presents effective control of HVAC and lighting systems in BMS by the use of Allen Bradley SLC 500 PLC along with wonder ware in touch SCADA for monitoring and management to control building conditions. Integration of two or more PLC’s can be used to control and automate collaborative systems of building management system [1]. With reference to figures 3 to 4 different methods for identification and control of atmospheric air were studied as explained in [2]. Authors in [3] presented control strategies for HVAC and lighting systems to control air handling unit operations. PLC-SCADA functionality is explained in [4]. For effective lighting, standard luminance control is explained in [5]. Keywords: BAS; BMS; PLC; SCADA; HVAC etc.. --------------------------------------------------------------------***---------------------------------------------------------------- 1. INTRODUCTION The main aim of BAS system is to improve control and management of mechanical as well as electrical systems in buildings. The Purpose of this project is to provide comfort and energy savings in laboratories, cleanrooms, warehouses, offices, and manufacturing spaces, industries, houses for Integrated Building Management. The control variables are temperature, humidity, enthalpy and luminance. The basic functionality of system can be divided in three main parts as below. 1.1 Field level The devices like temperature sensors, pressure sensors, humidity sensors, enthalpy sensors, actuators, motion sensors, smoke detectors, valves, dampers, fans, card readers, motors, light switches etc. are the field devices which physically controls and detect the building functions. They are located on field. Air temperature is the most common measure of comfort, and the one that is most widely used. The field network connects the actuators, sensors and other field level devices to controller in automation level. They are connected by means of hard wired, bus system, power line or wireless etc. 1.2 Automation level The automation level includes the advanced controllers like PLC that controls and regulates the field level devices in real time. Programs are stored in RAM of PLC to initiate different control actions according to changes in building conditions. 1.3 Management level All devices that manages and monitors the building automation system and that communicates with personnel and internet are included on management level. Examples of these devices are database which logs activities, web servers, operator panels, CCS (central control station), servers that translate messages into different protocols etc. 2. SYSTEM DESCRIPTION AND ARCHITECTURE Fig. 1 represents the architectural block diagram of system integration. Computerized control will help to achieve more critical control tasks than conventional one. Use of PLC in co-ordination with SCADA will ensure more increased performance as compared to relay logic systems. 2.1 Relay Logic Combinational logic implementation in electrical control circuits by using several electrical relays wired in a particular configuration is nothing but relay logic control. In this all system components are connected by means of hard wired connection hence the system flexibility is very low which means that if we want to change the connections in the system then whole system has to be redesigned.