Finding The Best In PCs

If you have used personal computers for a long time, you know they have come a long way since they started out. PC touch screen is not something that is geeky anymore. It is found in a lot of places. The touch screen has found utility even in the mobile screens that we use. In case you are wondering how that translates to PC, it is because computers can also be built to be controlled like that. Technology like the LCD is often used for screens like these. They also serve as interfaces for data acquisition software. SCADA or Supervisory control and data acquisition is a control system architecture that uses computers, networked data communications and graphical user interfaces for high-level process supervisory management, but uses other peripheral devices such as programmable logic controllers and discrete PID controllers to interface to the process plant or machinery. The operator interfaces which enable monitoring and the issuing of process commands, such as controller set point changes, are handled through the SCADA supervisory computer system. However, the real-time control logic or controller calculations are performed by networked modules which connect to the field sensors and actuators. This is where it finds its usage often.

The usages can be defined as below

• The software is controlled through a human machine interface known as HMI. The human-machine interface (HMI) is the operating window of the supervisory system. It presents plant information to the operating personnel graphically in the form of mimic diagrams, which are a schematic representation of the plant being controlled, and alarm and event logging pages. The HMI is linked to the SCADA supervisory computer to provide live data to drive the mimic diagrams, alarm displays and trending graphs. In many installations the HMI is the graphical user interface for the operator, collects all data from external devices, creates reports, performs alarming, sends notifications, etc. Mimic diagrams consist of the line graphics and schematic symbols to represent process elements, or may consist of digital photographs of the process equipment overlain with animated symbols.

• Supervisory operation of the plant is by means of the HMI, with operators issuing commands using mouse pointers, keyboards and touch screens. For example, a symbol of a pump can show the operator that the pump is running, and a flow meter symbol can show how much fluid it is pumped through the pipe. The operator can switch the pump off from the mimic by a mouse click or screen touch. The HMI will show the flow rate of the fluid in the pipes decrease in real time. These are some real time applications of PC touch screen that users of the software can see. This makes it easy for the engineer to interact with the system because it tends to be more visual them. Also, there is not enough space to install big computers with keyboards next to the heavy machinery so touch screens serve the purpose quite well. If you haven’t seen one in use, you can visit a big plant or factory to see one of them being put into use.


Hey myself Archer Finch. Even though I took extra care about my systems, but still it was more prone to hacking. With the introduction of the PC touch screen, my system is now very much safe from all sorts of threats, as most of the SCADA are connected to web based portals or products.