Telegrams for communication between devices in industrial networks

Anže Leban (2013) Telegrams for communication between devices in industrial networks. EngD thesis.

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Abstract

The development of information technology has also made its impact on the industrial networks, as the TCP/IP Ethernet bus communication is ever more frequently used for communicating between programmable logic controllers and high-level systems. In this thesis we have developed a program code that enables communication between the controller and the higher-level system on Ethernet bus. Our focus was on the controller side. To complete the task, it was necessary to determine the structure of the message - telegram, that you send between communication partners. Telegrams are build of two parts, control and data. Key for the system smooth functioning is that the telegrams are not lost during communication path. The program code was developed for different types of hardware, we used two Siemens controllers, controller Simatic S7-300 and Simotion D425. We also used the module CP 343-1 Lean which is an expansion module for the controller S7-300. The program code was developed for use in automated high-bay warehouse for communication between crane controllers and higer-level systems.

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