The topic of CIP is on everyone’s lips. In our presentation, which reflects over 30 years of practice in the area of ​​CIP/SIP/DIP, we want to convey the basics of this topic. The modular structure of such systems is explained and what we believe needs to be taken into account when designing such systems. We would like to provide an exciting insight into everyday life when dealing with these systems using many practical examples. It is important to use practice as a leading factor.