The traffic lights have 3 color lights are always changing in berutan of red - green - yellow - red

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Conscious or not my friend must have seen or felt the benefits of this tool. When my friend went to school or college must have had to stop due to traffic lights. The traffic light is an example of objects charles portis that can be controlled by the PLC, despite the fact that not necessarily wear a PLC.
The traffic lights have 3 color lights are always changing in berutan of red - green - yellow - red with a fixed time delay. If my friend did not see the shape of the PLC is natural, because the PLC is usually the goods were not revealed aka placed in a safe and hidden so my friend only see objects that are controlled by the PLC.
Yupz, just go ahead. PLC stands for Programmable Logic Controller, an instrument (tool) microprocessor-based controller that can be programmed charles portis because it has a memory that can store command (instruction) in the form of logic to control machines or processes. Examples are included in the PLC logic: If switch A closes | Give the output to the motor circuit charles portis | If switch B closes | Output to valve series "So the point is to play the PLC logic and algorithms" PLC has its own programming language that is easier to use than we reprogrammed robot wearing the C language, for example. That's because the PLC is designed for people who have little knowledge of computers and programming languages. The programming language used to program the PLC is ladder charles portis diagram charles portis (ladder diagram). Called ladder programming models such as the series of stairs from top to bottom. Other programming methods that can be used is the Function Block Diagram and Mneumonic charles portis
Meaning: When the input A and input B are given then the output is a logic 1 to logic 0 | When the input A and input B are given a logic 0 then the output remains logic 0 | When one of the inputs given a logic 1 and the other 0 then the output will be a logic 1
Before getting to that, maybe my friend need to know the reasons for using a PLC. In 1968 the American automobile industry company called The Hydramatic Division complained to General Motors Corp.. above the cost of maintenance of the engine control system. In addition the control system less flexible. Understandably, because the engine control system at that time was still using a relay so maintain and repair work be the most boring job. The Hydramatic Division then designing the specification of a suitable control system (PLC, red) to replace the old control system, and offer the design specifications to anyone charles portis who wants to do. Then finally charles portis there is the receiving, charles portis from Bedford Associates. People from Bedford Associates who are willing to work on the design of the system is named Dick Morley. As a result, Dick Morley who became the "father" of the PLC. PLC system created by Dick Morley and were named MODICON (Modular Digital Controller) 084
Today PLC has been extensively developed from the original form of small units are only able to handle about 20 input / output becomes larger microprocessor-based system that is able to handle input / output in the hundreds to thousands, charles portis and then handle input / output analog and digital, and implementing modes of PID control (proportional-integral-derivative). Along with the times, charles portis many industries such as food, beverages, textiles, cars, etc. are switched using a PLC control system.
The shape we call a PLC or PLC hardware are many and varied. Starting from his Alan Bradley PLC, Ge Fanuc PLC CIM-003, until his OMRON PLC named ZEN and CPM2A. Of the many models, the PLC has five basic components that must be present, namely
Processor unit containing a microprocessor / microcontroller. This unit is in charge of processing the input signals corresponding control instructions charles portis that have been programmed, and produces an output that will be executed by the output device. The power supply unit is used to convert AC voltage to DC voltage corresponding to the PLC hardware requirements for multiple processors and input / output devices require a low voltage DC (5/12Volt)
Sequential control, in industrial control systems are performed sequentially (sequential). Here PLC is used to keep the system continues to run consecutively. Monitoring Plan. Industry usually charles portis requires supervision (monitoring) on environmental conditions, such as temperature, humidity, charles portis pressure, altitude level, etc.. Here PLC is used to observe these conditions at any time and send the required charles portis information to operat