[attachment=15579]
Abstract
Supervisory Control and Data Acquisition (SCADA) system was being used in industries to control easily and simply. It is a computer control and a software application. This paper describes implementation of control unit to control the filling system with modeling design. It aims a manufacturing system using SCADA control system. It has been designed to work on the computer for the process. The main purpose of this paper is to implement the hardware components for the filling process and to interface between master station and control unit for controlling the data. Microcontroller and control circuits have been used for control unit. This paper will support manufacturing systems to be easy, simple and accurate. Keywords—SCADA System, Control Unit, Manufacturing system, Motor driver, Microcontroller and Filling process.
I. INTRODUCTION
HIS paper implements the filling operation of pure drinking water plant, and this can be use other systems of various industries. It includes about how SCADA systems use in the industry. So, it includes SCADA components and protocols of the system. And it uses the facts that include how interface and monitor the process. It is mainly implemented SCADA software to apply for the control and monitoring between hardware processing and computer. It applies interfacing sever protocol when needed between the SCADA software and the hardware process. Filling process designs the model with nearly hardware devices. It uses dc motor drivers, sensing drivers, Programmable Interface Controller (PIC) microcontroller device and parallel port communication. So, a typical SCADA control system consists of one or more remote terminal units (RTU or PLCs) connected to a variety of sensors and actuators, and relaying information to a master station. Fig.1 shows the control system of filling process using SCADA. According to SCADA control system, the hardware components of the filling process are implemented and interfaced between the microcontroller and master station. In this project, the control unit will be used for filling process. But, the four main components will not be used because it is difficult to get the PLC hardware component. So, it will use PIC 16E877A instead of PLC hardware and parallel port as interface communication. Fig. 1 SCADA system for filling system
II. ANALYSIS OF CONTROL UNIT
This system is two sections in filling process- one is control process of the water level in the tank. This control section will make only the water level. When the water level reaches at the upper level, the pumping motor is OFF from the running mode. On the other hand, it is ON when the water level is at the lower level. Second is the operation of the filling process. Firstly, the position sensor will sense the bottles to fill the water whether the specified position on the conveyor or not. If the bottle reaches at this position, the filling motor will be operated. Then, the counter motor will be operated when the bottles reach at the counter sensor to push on the second conveyor and count the number of the bottles to pack when there are ten bottles. If the bottles have not only at the position sensor but also at the counter sensor, it will operate the counter motor to drive the second conveyor motor after the position sensor has operated to drive the filling motor. If the counter has ten bottles, the counter will reset. The overview block diagram of this project is shown in Fig. 2.