Instructions in Ladder Logic are written in a language called Ladder Logic.
Instructions in Ladder Logic are written in a language called Ladder Logic. To write an instruction, first identify the input and the output of the instruction. Inputs can be ladder rungs or text values from a programming tool such as Microsoft Excel. Outputs can be ladder rungs or text values from a programming tool such as Microsoft Excel. For example, if you wanted to add two numbers together and output the result, you would have an input for each number and an output for where to put the result. The first thing you do is scan the logic diagram from left to right, looking for any inputs that share a common connector.
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