An s5d file extension is associated with the Siemens Step 5 programming tool for S5 PLC.
S5D file extension - Siemens Step 5 source code
What is s5d file? How to open s5d files?
File type specification:
The s5d file extension is associated with the Step 5, a programming tool for Microsoft Windows that allows users to develop programs for Simatic S5 PLC.
The s5d file stores source code of program for S5 PLC.
This s5d file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.