Plc programming How Ladder logic works
Logic controller which has terminals on inputs and outputs the relations between these inputs and outputs are established via a control logic the control logic and program using different programming languages. Some of them are every Lado sequential logic structured text excetra out of this one of the most commonly used language is ladder logic.
It gets its name because the program looks like a ladder with different input output relation. We can see a ladder logic in front of the left and right lines corresponding to the power line the horizontal lines, but the component blocks are placed are called once promised a ladder logic is the PLC process the code from left to right and top to bottom.
Latest Roy to filter ladder logic for basic Gates that is and or and not we will be using push buttons and LED is for the same physical disk read input can be mapped to logical inputs in along the value that these devices can take RNC or an assistance for normally closed contact and yellow stands for normally open contact. This means that when input is not energized. The states will be the ones that are defined.
However, if the input is energized the state of this court that change that is understand this in the form of animation. We have collected and open switch to input 1 if we connected as I know contact in the cord the annual contract becomes and see when we close the switch similarly if we connect and open switch to NC contact it changes to hello when you close the switch.
Latest build an and Gate using to push buttons and alarm for and it is shown here. We can see that once in a contract for each post button is connected in series and output lamp is further connected
in series a side note on this inputs are always connected on the left side of the young input can be connected in series or parallel output for always connected on the right side of the Rang and outputs can only be connected in parallel with the wrong is complete one can imagine a current to flow and power get supplied to the output device coming back door and Gate we can see that I know contact turns into NC contact when their corresponding push buttons are stressed that ok it on this one will be complete only when both the contacts done as NC this is possible only when both the push buttons are pressed. So if we compared it with Boolean logic, the output will be Hai only when both the input Chart high
