
The same with S7-200, the control program for an S7-200 Smart CPU consists of the following types of Program Organizational Unit (POU): Main program, Subroutines, and Interrupt routines. In this post, I guide you: How to set and unlock the POU password S7-200 Smart using Step7 Micro/WIN Smart Software. Set a POU PasswordOn Step7 Micro/WIN Smart use a ribbon tab user interface (the same as Microsoft...