Tips and download for process control, automation and PLC
The numeral system that the people use is the decimal system, this is, Exist 10 different symbols which are combined to make any number. The 10 symbols are the numbers 0 to 9. In order to represent the decimal number…
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The analog variables are measured with transmitters, for example, if it wants to measure the tank level, it install a level transmitter that provides an analog signal, which, in the most case, it is voltage or current. The next figure…
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Analog modules receive signals with two values or more of information. Two standards very used are those which keep the values into the range of 4 to 20 mA or 0 to 10 VDC, but there are others. For example,…
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There are a great variety of input output (I/O) modules that allow the exchange of information between the PLC and the process. Input modules send information of the process state to the PLC and output modules send information from PLC…
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Programmable logic controllers are electronic devices that are frequently used in the management of industrial processes. They were introduced in the 60s to replace the former wire logics or relay logics, which were made with different kinds of relay (such…
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