Tips and download for process control, automation and PLC
My first job as an engineer was installing and configuring a PLC that my boss, who did not know much about the subject, he bought from a representative of a prestigious brand, but the seller did not know much about…
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Sensors are a very important part of the instrumentation and control of industrial processes, are used to determine the status of the process where they are installed and transform the variations of the measured variable into an electrical signal conditioned…
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What is an operator interface? An operator interface is a device (or more) by which the operator gives orders to the controller of a process and receives from the controller the process current state. Operator interface levels There are a…
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The processes have continuous variables that belong to state space of real numbers, that is to say, they can have infinity values when they change over time. On the other hand, the digital systems, manufactured by the humans, as for…
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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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