![]() ![]() Especially if you have prior experience with electrical circuits and relays or some boolean logic. You should know why ladder logic was invented because then it will be much easier for you to understand it. To get you started with ladder logic there are a few things you should know about the programming language. But for now, the only thing you need to know is that there is a standard describing this programming language. This simply means that ladder logic is described in a standard. It is one of the standardized PLC programming languages. Ladder logic is not only a programming language for PLC’s. The people or the organization that sets the standards for ladder logic is PLCOpen. Even simple bit logic operations can be beneficial in more advanced PLC programs and SCADA system programming. Ladder logic is mainly for bit logic operations, although it is possible to scale a PLC analog input. Ladder logic is made out of rungs of logic, forming what looks like a ladder – hence the name ‘Ladder Logic’. It is a graphical PLC programming language which expresses logic operations with symbolic notation. Ladder logic (also known as ladder diagram or LD) is a programming language used to program a PLC ( Programmable Logic Controller ).
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