**6. Integration of real-time noise system parameters with command and control center**

Noise monitoring data of holy places and their habitants can be collected in realtime domain with aid of computerized monitor and control distributed systems at master location. The system is called Supervisory Control and Data Acquisition (SCADA). The control may be automatic, or initiated by operator commands. The data acquisition is accomplished firstly by the remote terminal units (RTU's) scanning the field inputs connected to the programmable logic controller (PLC). This is usually done at the fast rate. The central host will scan the RTU's usually at a slower rate. The data is processed to detect alarm conditions, and if an alarm is present, it will be displayed on special alarm lists. Data can be of three main types. Analogue data (i.e. real numbers) will be trended on data analytics software (i.e. placed in graphs). Digital data (on/off) may have alarms attached to one state or the other. Pulse data (e.g. counting revolutions of a meter or counter) is normally accumulated or counted.

A typical SCADA system includes remote sensors, controllers, or alarms located at facilities of holy places, as well as a central processing system situated in an appropriate location. SCADA systems integrate data acquisition systems with data transmission systems and graphical software in order to provide a centrally located monitor and control system for numerous process inputs and outputs. SCADA systems are designed to collect information, transfer it back to a central computer and display the information to the operators, thereby allowing the operator to monitor and control the entire noise system parameters from a central location in real time.

#### **6.1 Components of SCADA system**

SCADA system is composed of the following:


The Central Monitoring Station (CMS) refers to the location of the master or host computer. Several workstations may be configured on the CMS. It uses a Man Machine Interface (MMI) program to monitor various types of data needed for the operation. The Remote Station is installed at the remote points in the facilities being monitored and controlled by the central host computer. This can be a Remote Terminal Unit (RTU) or a Programmable Logic Controller. Field instrumentation refers to the sensors and actuators that are directly interfaced to the remote locations in the holy facilities. They generate the analog and digital signals that will be monitored by the Remote Station. Signals are also conditioned to make sure they are compatible with the inputs/outputs of the RTU or PLC at the Remote Station. The Communications Network is the medium for transferring information from one location to another. This can be via telephone line, radio or cable.
