In today's increasingly high-tech world, robotics and automation are playing a crucial role across various industries. These systems boost productivity, cut costs, and enhance precision in carrying out tasks. Robots, machines, and communication methods have become essential components in modern manufacturing facilities, adding greater flexibility and efficiency to industrial processes. In this final thesis, various aspects of robotics will be explored, placing particular emphasis on robot components and structure, robot characteristics, and their applications in industry. CNC machines, especially CNC milling machines and G-code programming will be studied. One crucial aspect of industrial automation involves communication protocols that enable seamless interaction between various devices and systems. This paper will investigate various industrial communication protocols, such as Fieldbus communication protocols like PROFIBUS and Industrial Ethernet protocols like PROFINET. In the practical section of this paper, several devices will be specified that will be used in the simulation, including ROBOT FANUC M-20iD/35, CNC ALPHA T-14iE and SIEMENS PLC S7-1200. Furthermore, the software tool ROBOGUIDE FANUC will be studied, in which the operation of the machine by the robot will be programmed, and the TIA PORTAL SIEMENS for programming the PLC and establishing communication between the robot and the machine.