SCADA, PLC & Touch Screen Systems

SCADA, PLC & Touch Screen Systems

Category: SCADA, PLC & Touch Screen Systems Available
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Description

What is SCADA?

Supervisory control and data acquisition (SCADA) is a control system architecture comprising computers, networked data communications and graphical user interfaces for high-level supervision of machines and processes. It also covers sensors and other devices, such as programmable logic controllers, which interface with process plants or machinery.


Examples of use

Both large and small systems can be built using the SCADA concept. These systems can range from just tens to hundreds of control loops, depending on the application. Example processes include industrial, infrastructure, and facility-based processes, as described below:


Programmable Logic Controllers

Also known as PLCs, these are connected to sensors and actuators in the process, and are networked to the supervisory system. In factory automation, PLCs typically have a high-speed connection to the SCADA system. In remote applications, such as a large water treatment plant, PLCs may connect directly to SCADA over a wireless link, or more commonly, utilise an RTU for the communications management. PLCs are specifically designed for control and were the founding platform for the IEC 61131-3 programming languages. For economical reasons, PLCs are often used for remote sites where there is a large I/O count, rather than utilising an RTU alone.
 

What is Touch Screen Display?

A touch screen is the assembly of both an input ('touch panel') and output ('display') device. The touch panel is normally layered on the top of an electronic visual display of an electronic device.

The display is often an LCD, AMOLED or OLED display.

A user can give input or control the information processing system through simple or multi-touch gestures by touching the screen with a special stylus or one or more fingers. Some touchscreens use ordinary or specially coated gloves to work, while others may only work using a special stylus or pen. The user can use the touchscreen to react to what is displayed and, if the software allows, to control how it is displayed; for example, zooming to increase the text size.

The touchscreen enables the user to interact directly with what is displayed, rather than using a mouse, touchpad, or other such devices (other than a stylus, which is optional for most modern touchscreens).

 

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