Introduction
Free-form comments allow you to add comments to the source code for graphic programming languages similar to line comments for textual languages.
Free-form comments can be used for all non-binary boxes.
Commenting out program code
To deactivate individual instructions or entire program sections in the LAD and FBD programming languages, you must set a bit parallel to the instruction or in series to an instruction block. Commenting out, as in STL and SCL, is not possible in LAD and FBD.
Examples of commenting out program code in all programming languages are available in the Siemens Industry Online under the following FAQ ID: 109482004