These not only provide users with information but also allow the user input control over components. The different examples of input information into the PLC to the user are on and off states for switches, buttons, and encoders. High and low states for temperature and pressure sensors or liquid-level detectors. The different examples of human interaction inputs into the PLC can be a button, switch, or sensor activation from a keyboard, touchscreen, remote, or card reader.
The physical action output from the PLC when any of these inputs are activated can be starting motors, turning on lights, increasing or decreasing temperature, draining a valve, or turning a pump off.
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A programmable Logic Controller PLC is an industrial computer used to control a specific process, machine system, or sometimes even an entire production line. PLC is an industrial computer without a mouse, keyboard, and monitor. As it is an industrial computer, a logical program to control the process is prepared in the general computer. Then this program is transferred to the PLC using cables. This program is stored in the PLC memory. The logical program is prepared using a programming language called Ladder logic, Statement List, or Functional block diagram.
A program is prepared in such a way that the peoples with electrical or instrumentation background can easily understand. A Programmable Logic Controller consists of various inputs and outputs terminal. A PLC monitors the status of switches and sensors using input terminals and based on this status they will give the command to the output devices through the output terminals.
SCADA system is an important factor of the industrial organization as they help to monitor process data as well as control the processes and easily detect any issue within the process thus reduce downtime. Home Forum Tool Contact Us. Facebook Twitter Linkedin Youtube. Primary Menu AutomationForum. Search for: Search. What is industrial control system ICS. Sivaranjith Instrumentation Engineer. Related posts. Basics of Relays Areej February 14, February 25,
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