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Ladder logic (also known as ladder diagram or LD) is a programming language used to program a PLC ( Programmable Logic Controller ).
![ladder logic program calculator ladder logic program calculator](https://1.bp.blogspot.com/-xzbnua3Gi2g/WFL1o4bUtYI/AAAAAAAABvw/fgywhQtQ0tA4JfMfU1T2DLioRuzp1rTtwCLcB/w1200-h630-p-k-no-nu/simple%2Binterstcpp.png)
Ladder logic (also known as ladder diagram or LD) is a programming language used to program a PLC ( Programmable Logic Controller ).