In factory automation, there exists a number of industrial protocols used for communication and transmitting data. One such protocol is the Modbus TCP. Modbus TCP is a very simple-to-understand and easy-to-implement industrial protocol. In this tutorial we'll cover how to configure a Siemens S71500 PLC as both a Modbus Client and Modbus server, we will learn how to read and write data over the Modbus network, and how to use PLCSIM Advanced for advanced simulation functions in TIA Portal. If this is the first time you are coming across the Modbus protocol, you should first read this introductory tutorial.
This is a companion discussion topic for the original entry at https://www.solisplc.com/tutorials/modbus-tcp-communications-in-siemens-tia-portal