Information You Did Not Know About PLC

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Ever heard terms like PLC or Fanuc Alarm Codes List, and wondered what do they mean? This article will dive into the world of PLC to help you know information that you probably did not know before. 


Why is the programmable logic controller essential in industrial automation?

  1. Easily controlling the production procedure
  2. The quality to provide fast and high accurate operations
  3. The possibility to read many digital, analog, and high-frequency inputs
  4. Transferring control output systems and components
  5. Safe, accurate, and flexible
  6. Network connection facilities
  7. Networking of programmable logic controllers and the ability to control them with a central compute
  8. Speedy responses
  9. Diminutive dimensions


The Application of programmable logic controller

  1. Manage any mechanical or electrical device
  2. Manage the production lines system
  3. CNC circuit management 


The disadvantages of PLC

  • We all know that programmable logic controllers have many advantages, but still, they have some disadvantages. Here is a list of some of them: 
  • It is difficult to change the thinking of personnel from ladder and relay systems to computer concepts of PLC.
  • Some applications are single-purpose applications. Using a PLC that has a lot of programming capabilities may not be cost-effective if you do not need them. An example of these applications is roller controllers/trackers. Some equipment manufacturers still use mechanical roller systems to reduce costs. The order of operation of the rollers rarely changes, so the ability to change the programming of PLCs is not so important here.
  • Some work environment parameters, such as high temperature, vibrations, and electromagnetic interference, are factors that limit the use of PLCs.
  • In relay systems, pressing the stop switch cuts off the power to the circuit and shuts off the power supply, causing the system to shut down. In addition, relay systems do not turn on automatically when the power is reconnected. Of course, this can also be done through PLC programming. However, in some PLC applications, an input voltage may be required to stop a device. Such systems are not safe from error. This defect is fixed, in addition to the protection relays to the PLC system.
  • If the circuit never needs to be changed, a fixed control system (such as a mechanical roller) will cost less than a PLC. PLCs are more efficient where change operations occur periodically.


Application of programmable logic controller in the industry

Programmable logic controllers are used in various machines and accessories in many industries worldwide. Many people believe that it is better to call our age the age of PLC, rather than naming it the age of industry! If you work in a field in which you deal with packaging, machine building, or others, then you probably use programmable logic controllers.


Here are some industries that use the PLCs: 

  1. Automotive industry 
  2. Plastic industry 
  3. Heavy industries 
  4. Chemical industry 
  5. Food industry 
  6. Machine industries 
  7. Transportation industries 
  8. Energy conversion industries
  9. Construction services 


What is the difference between a PLC and a computer?

We can find the components of a computer in a single programmable logic controller. A computer is distinctive when it comes to the kind of inputs and outputs, and regarding the process of connecting inputs and outputs with PLC. Programmable logic controllers might be several things such as a relay, a transistor, and many more. And this is chosen based on the highest admissible output current of the programmable logic controller, in which nothing wrong happens to the system. In a programmable logic controller, we realize the outcome of the action, while in the computer we just notice the data. 

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