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Talking about the automation system of a factory, it is not worth it if you don’t discuss the control panel or the control device from the factory machine automation system.
Is a Programmable Logic Controller, which is a combination of a variety of electronic devices capable of performing various control functions at a more complex level, such as a factory machine automation system.
By using this PLC, an automation system or machine can be programmed, controlled, and operated by an operator who is not even experienced. So in other words, using a PLC will simplify the work or production process. PLCs can operate a variety of systems that have an output between ON and OFF, or also by using other variations.
History of Programmable Logic Controller (PLC)
PLC is basically an electronic device that can replace the relay panel. At the beginning of its appearance. PLCs were only used in ON-OFF conditions as motor controllers, solenoids, or actuators, or various other automotive devices.
In 1978, along with the discovery of a breakthrough microprocessor chip that was able to increase computer capabilities in all kinds of automation systems. The PLC program also experienced quite rapid development, until now this PLC program can be easily understood and understood by many people. In 1980, PLC continued to experience rapid development. At that time, PLCs have been widely used in various building automation systems and security control systems.
Until now, in the modern era, all control systems have been integrated with the entire factory, such as feedback control, data processing, and not to mention a centralized monitoring system. PLC has become the choice of many industries, and has developed into a very smart device, and has become the main requirement of every modern industry, as a device capable of data acquisition and storage.
PLC function in modern industry
In general, PLC is an electronic digital system that is specifically designed to be able to control factory production machines, by implementing sequential control logic functions, operating time, counting, to arithmetic.
PLCs have some similarities with other digital computers in components such as processors, control units, etc.
But have several differences in terms of application, including:
specially designed to be in busy industrial environments, heat, lots of vibrations, dust, and so on.
Also designed to be easy to maintain and not have systems that are too complex for factory technicians to operate.
Generally do not have a monitor but are equipped with a peripheral port that is used for program input and data and program monitoring.
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And here are some operations that PLCs perform at the factory, including:
- Logic Relay
- Timing (Timing)
- PID control
- Operation BCD
- Data Manipulation