Programable logic controllers
A programmable logic controller, commonly known as a PLC, is an electronic device that performs sequential processes at an industrial level. It monitors inputs and outputs (I/O) and makes logical decisions to automate processes or machines.
PLCs are programmable controllers that allow machines to perform processes without the need for human intervention. Therefore, PLCs are defined as intelligent controllers. The use of such controllers is mainly found in the industry, where large and complex installations work with many processes.
Characteristics of programable logic controllers
They are characterized by being robust components that, in some cases, can withstand harsh conditions such as extreme cold, heat, dust, and humidity. Their function block programming language is easily understood, allowing for programming with minimal difficulty. Programmable logic controllers are modular, meaning that additional modules (analog, communication, weighing, or temperature) can be added if needed.
How does a programable logic controller work?
The programmable logic controller perceives the information sent by connected sensors or input devices, processes the data, and activates the outputs based on programmed parameters.
Based on the inputs and outputs, a programmable logic controller can monitor and record runtime data, machine productivity, or operating temperature. It can automatically start and stop processes and create alarms if a machine is not functioning properly.
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Advantages of programable logic controllers
Programmable logic controllers have the ability to perform control functions from a single application and wiring. Thanks to their internal programming, there is no need for a large number of interconnected cables.
The use of programmable logic controllers makes it easier to identify and correct system errors, allowing for changes and the addition of new specific functionalities to solve problems during the industrial process.
Furthermore, one of the advantages is their compact size. The control system occupies less space, making it easier to handle. Combined with the advantage of size, it becomes simpler to make changes and add new functions to the control system. PLCs also offer various diagnostic and troubleshooting functions, making it easier to detect errors and isolate them specifically to prevent their recurrence.
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