![]() ![]() ![]() This is due to the fact that a PLC or a microcontroller is really just advanced electrical circuits made out of transistors. Because what is really going on, is that the PLC works with binary numbers. But that does stop us from working with analog signals. The answer is binary numbers! Representing Analog Signals with Binary NumbersĪs mentioned before a PLC can only work with the two values 0 and 1. We cannot represent it with boolean values, because they can only have the values 0 and 1. The question is now: how do a PLC deal with all these different values? Let’s say you have an analog signal at 5 volts going into the PLC. If you look at the diagram below, you will see that the analog signal can have any value between 0 and 10 volts. And since analog signals are continuous, this signal will always at any time represent a voltage level. This signal can vary from 0 to 10 volts and have any voltage level in between. But what about analog signals? As Wikipedia writes, analog signals are continuous signals that can vary over time.įor example you can have a 0-10 volt analog signal. They are either 0 or 1 and thereby relatively easy to work with. A PLC can only work with the values 0 and 1. If you’ve read my article about combinatorial logic you will know that a PLC works with boolean values. Analog Signals in the PLCįirst of all, we are going to look at some numbers. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |