Remote Data Acquisition Using Wireless - Scada System White Paper Free PDF Download Link

In this paper we have developed an integrated wireless SCADA system for monitoring &  accessing the performance of remotely situated device parameter such as temperature, pressure, humidity on real time basis.

For this we have used the infrastructure of the existing  mobile network, which is based on GPRS technique Supervisory Control and Data  Acquisition (SCADA) is a field of constant development and research. This project investigates on creating an extremely low cost device which can be adapted to many different SCADA applications via some very basic programming, and plugging in the relevant peripherals.

Much of the price in some expensive SCADA applications is a result of using specialized communication infrastructure. The application of infrastructure, in the proposed scheme the cost will come down. Additionally the generic nature of the device will be assured.

Wireless SCADA deals with the creation of an inexpensive, yet adaptable and easy to use SCADA device and infrastructure using the mobile telephone network, in particular, the General Packet Radio Service (GPRS). The hardware components making up the device are relatively unsophisticated, yet the custom written  software makes it re-programmable over the air, and able to provide a given SCADA application with the ability to send and receive control and data signals at any non predetermined time.

GPRS is a packet-based radio service that enables “always on” connections, eliminating repetitive and time-consuming dial-up connections.  It will also provide real throughput in excess of 40 Kbps, about the same speed as an excellent landline analog modem connection.

From the wireless SCADA system which is proposed in setup the temperature of around 30 deg C could be sufficiently recorded from remote location. In the similar manner reading of electric energy meter could be read 223 Kilo Watt Hour (KWH) or 223 Unit.

The properly designed SCADA system saves time and money by eliminating the need of service personal to visit each site for inspection, data collection /logging or make adjustments.    

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SCADA Systems Security - White Paper Free PDF Download Link

1. Abstract
The purpose of this paper is to define what SCADA systems are and their application in modern  industry and infrastructure, to elucidate the reasons for rising concern over the security of these  systems, to analyze the fundamental vulnerabilities and to put forth recommendations for the  implementation of security in these systems.

2. Introduction:
Supervisory Control and Data Acquisition systems are basically Process Control Systems (PCS), specifically designed to automate systems such as traffic control, power grid management, waste processing etc.

3. Application
Control systems are used at all levels of manufacturing and industrial processing. A  manufacturing plant that employs robotic arms will have a control system to direct robotic arms and conveyor belts on the shop floor. It may use that same system for packaging the finished product and tracking inventory. It may also use a control system to monitor its distribution network.

A chemical company will use control systems to monitor tank levels and to ensure that ingredients are mixed in the proper proportions. A Las Vegas casino will use control systems to direct the spray from water fountains in coordination with the lights and music. Control systems are also used in the drilling and refining of oil and natural gas. They are used in the distribution of water and electricity by utility companies, and in the collection of wastewater and sewage. Virtually every sector of the economy employs control systems at all levels.

The term "supervisory control and data acquisition" (SCADA), however, is generally accepted to
mean the systems that control the distribution of critical infrastructure public utilities (water,
sewer, electricity, and oil and gas).

SCADA systems are still to come into widespread infrastructural use in India. In this country they
are being used primarily for automation in industrial production, and to some extent for
specialized process control.  Ranbaxy Labs
1 and Voltas
2 are two of the companies in India using  SCADA systems for process control.


However, they are increasingly common in the US, UK, Australia to name a few countries, where
they are used in the control of infrastructural systems such as power, water and waste
management, traffic control etc. The economy and infrastructure of these countries is increasingly
dependant on SCADA systems.

4. Implementation: How do they work?
3. SCADA systems are primarily control systems. A typical control system consists of one or more
remote terminal units (RTU) connected to a variety of sensors and actuators, and relaying
information to a master station. Figure 1 illustrates this generic, three tiered approach to control
system design. Figure 2 shows a typical RTU.

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