Activities Manual for Programmable Logic Controllers
Activities Manual for Programmable Logic Controllers
5th Edition
ISBN: 9781259679568
Author: Petruzella, Frank
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 14, Problem 2P
Program Plan Intro

Alarm:

In a control system, the alarm refers to the messages which help to point out the fault conditions occurred in the system. An alarm summary will contain a list of time stamped active alarms in the system.

Human Machine Interface (HMI):

  • HMI is a hard-wired panel board which helps to operate the control process using a simple touch-screen on the required control icon.
  • HMI eliminates the use of hard-wired components like switches, relays, push buttons, and many such.
  • During control operations, HMI enables one to watch the operation results by means of graphs.
  • HMI communicates with Programmable Logic Controller (PLC) and I/O sensors for getting and providing information for users to view.
  • It helps in optimizing an industrial process by digitizing and centralizing data for a viewer.

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Activities Manual for Programmable Logic Controllers

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