Safety module

Hello Luca;

Siemens proposes "configuration control" for just such circumstances: it allows you to create an overall hardware configuration for your end project, while you enable only certain portions for the existing hardware unitl the need arises to integrate the missing modules or equipment later. This will allow you to completely configure the modules you will eventually use so that there is less risk of problems later on when you enable the complete configuration.

Here is an explanation, wth a S7-1500 CPU:

https://support.industry.siemens.com/cs/ww/en/view/90731880

This application example provides documentation and program examples of configuration control with S7-1200, S7-1500 and s7-300 CPUs, and also discusses the case of F-IO ("configuration safety").

https://support.industry.siemens.com/cs/ww/en/view/29430270

You can download the Library for Configuration Control (TIA Portal) in the same link

Hope this helps,

Daniel Chartier