Online PLC Training Centers: Industrial Applications of PLCs

PLCs or Programmable Logic Controllers are computers with microprocessors used for industrial automation purposes that automate machine function, specific processes, or the entire production line. It is an electronic device used in a lot of industries like medical, construction, manufacturing, mining, information technology, electronics, food, aerospace, food, transport, agriculture or energy, to monitor, as well as control production processes and building systems.

It is designed to help perform a set of tasks, except real-time constraints with superior performance and reliability. To meet the demands of unrelenting industrial environments, Programmable Logic Controllers are designed to be sturdy, durable, usually capable of withstanding extreme humidity, temperature, vibrations, as well as electrical noises.

These devices are commonly tasked with controlling and monitoring a large number of actuators and sensors. That is why they are different from other computer systems in its extensive I/O or input and output arrangements. The device receives a lot of information from connected input devices or sensors, processes the necessary data, as well as triggers the output based on the pre-programmed parameter.

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Depending on the outputs and inputs, PLCs can record and monitor run-time data like operating temperature or machine productivity, start and stop the process automatically or provide alarms if the machine will face problems or malfunctions Programmable Logic Controller are a very sturdy and flexible control solution that can adapt to almost any applications. Some important features set them apart from other microcontrollers, industrial personal computers, and other industrial control solutions:


The Programmable Logic Controller’s Central Processing Unit store and process program information, but I/O or Input/Output modules connect PLCs to the entire machinery. These I/O modules are the ones responsible for providing data to the Central Processing Unit and trigger precise results.

The Input and Output can be either digital or analog. Input devices might include switches, meters, and sensors, while the output consists of lights, relays, drives, and valves. The user can mix and match the PLC’s Input and Output to get the right configuration for the application they are using.


In addition to I/O devices, logic controllers might also need to link with other types of systems. For instance, a user might need to export app data recorded by the device to a SCADA or Supervisory Control and Data Acquisition system that monitors multiple devices connected to it. The PLC can offer a wide range of communication protocols and ports to make sure that it can communicate with other systems

HMI or Human Machine Interface

In order for the users to interact with the system in real-time, they need a Human Machine Interface or HMI. These interfaces can be a simple display with text readouts and keypads, or a large touchscreen panel, similar to a consumer electronic.

But either way, these devices enable the user to input and review essential data to the controller in real-time. The method is used to monitor input values from sensors regularly, as well as producing output for the actuators’ operations based on the program the users are using.

Communication interface modules

These are smart Input/Output modules that transfer the data between a Central Processing Unit and communication network. These modules are used to communicate with other computers and controllers, which are placed in a remote place or distant location. The program in the Central Processing Unit of PLC consists of Operating System or OS and other user programs.

The purpose of the OS with the Central Processing Unit is to deal with the operations and tasks of the logic controller like starting or stopping the action, communication management and storage area, and so much more. The user program is used for controlling and finishing the tasks in automation. For more information about PLCs, check out websites like for more details.

Programmable Logic Controller in automation

These devices have helped a lot of industries in improving productivity and efficiency, like lowering the amount of power being consumed by the machine, controlling systems through using proper record keeping, as well as reducing the required workforce utilizing the supply of human resources.

The methods have also helped to lower the automation maintenance cost. IF businesses use trailing cables to operate the automated storage, as well as recovery systems, it will cause higher cost and time wastage. The higher cost is because of the fact that the cables will need frequent replacement and maintenance.

Applying Programmable Logic Controllers in automating the systems will lower the maintenance costs and reduces the system downtime. These devices have been effective in minimizing automation downtime. Because of its capabilities, these devices are becoming more and more exclusive compared to conventional PC or Personal Computers, as well as workstation arenas.

They are now able to share relevant information rapidly between and within companies. The rapid information sharing has helped minimize automation downtime as PLCs are very capable of automating the web servers and File Transfer Protocol, international databases, even sending electronic mails or emails. While most of these systems are used for manufacturing processes, the unique strengths of these devices can make the system viable for a lot of different applications.

Methods used in building automation might also have different sensors as inputs, ranging from a simple switch to mesh networks of airflow sensors. Different types of Input and Output ports let operations and maintenance personnel interface with the systems to adjust and monitor their behaviors from the central location or also known as Supervisory Control and Data Acquisition system.