PLC Programming Languages | SIEMENS TIA Portal | LAD | FBD | STL | SCL | GRAPH
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PLC programming languages created in a manner to cover different groups of people in industry with different expertise.
LAD and FBD are easy to handle, LAD is suitable for people familiar with relay contactor technology while FBD is perfect for people with Logical electronic circuits background.
STL is somehow close to machine level and people with assembly and microcontroller background are comfortable with that. The next language is the SCL that is similar to pascal and it is perfect for people familiar with high level programming. You can develop any complex program and computational algorithm with that.
Graph or SFC is suitable for sequential algorithm that is is hard to implement with conventional programming langugaes.It is easy to implement and super easy to trace and troubleshoot.