How to protect files of SCL sources?

Hello C. Reyes;

I know of 2 ways to protect selected blocks in a S7 Program:

1- Know-how-protect:

How can you install block protection for an S7-SCL block?

This protection simply bars any user to see the code in the blocks, to see/modify it you must have a copy of the original source. Think of all the Siemens blocks available for download where you can use a function but not open it and modify the code.

2- Code encryption:

How do you install the improved block protection for FBs and FCs in STEP 7 V5.5 onwards?

This encryption uses a password, so it would be closer to your requirements.

Hope this helps,

Daniel Chartier