Scada means Supervisory Control and Data Acquisition. Programs coded in Scada are used for controlling various industrial processes and complex equipments. There are various scada systems in use today. These are called MMI or man machine interfaces.
A master control unit runs the Scada programs that can control and analyze the data from various equipments. There are many ways by which communication takes place between the master control unit and the various devices. Ethernet, radio links and modems are widely used for the purpose.
In some cases there are instruments that have different types of data communication interfaces. In such cases, we can use converters for conversion of signals. All the information from various systems can then be viewed on the central location.
A database is maintained in the master control unit. All the equipments in the plant or infrastructure location have various parameters that are monitored and real time information about them is stored in the database. Thus any instrument can be controlled by the master unit.
There are two types of parameters used. These are analogue or digital. The SCADA software fetches them continuously and stores them. The program can then makes its calculations based on all those stored parameters.
The calculations made are dependent upon these parameters. The software shows a graphical interpretation of the data received from various equipments via various communication links in real time.
Some of the parameters received from various equipments are temperature, pressure and liquid level. The scada software can show the measurements and parameters in terms of graphical objects on the computer screen.
Additional software modules are available that will let you email or SMS yourself whenever a parameter passes a certain value. Thus SCADA systems can help maintain large scale plants having complex equipments. - 29939
A master control unit runs the Scada programs that can control and analyze the data from various equipments. There are many ways by which communication takes place between the master control unit and the various devices. Ethernet, radio links and modems are widely used for the purpose.
In some cases there are instruments that have different types of data communication interfaces. In such cases, we can use converters for conversion of signals. All the information from various systems can then be viewed on the central location.
A database is maintained in the master control unit. All the equipments in the plant or infrastructure location have various parameters that are monitored and real time information about them is stored in the database. Thus any instrument can be controlled by the master unit.
There are two types of parameters used. These are analogue or digital. The SCADA software fetches them continuously and stores them. The program can then makes its calculations based on all those stored parameters.
The calculations made are dependent upon these parameters. The software shows a graphical interpretation of the data received from various equipments via various communication links in real time.
Some of the parameters received from various equipments are temperature, pressure and liquid level. The scada software can show the measurements and parameters in terms of graphical objects on the computer screen.
Additional software modules are available that will let you email or SMS yourself whenever a parameter passes a certain value. Thus SCADA systems can help maintain large scale plants having complex equipments. - 29939
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