Question about STL ?

[kick 0]

if not then which way the CPU  of PLC Understand Ladder logic ( high level language )

Edited 5 Jul 2016 by kick

[Bryll 31]

Not sure I understand your question, but you can program the Siemens CPU in STL, Ladder, FB programming and also build FB and FC in structured text.

You can also program in SFC (Flowchart), but let's skip that one at the moment.

Closest to the compiled "machine code" that you load into the CPU is STL (statement list).

Next level is Ladder.

Above ladder is function block programming.

And above that is SCL (structured text).

The size of the compiled machine code might (will probably) differ between four programs written in these four programming languages.

You can switch programming language in Step 7 and TIA portal to see the difference between STL, Ladder and FB programming.

[surya 0]

Hi,

           pls refer this post, regarding STL programming.

Regards,

Surya

[Rodney 21]

There are a number of tutorials on youtube

Rodney