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https://straton-plc.com/wp-content/uploads/2020/06/tutoriels.jpg250250User’s guide to create a Modbus configuration Modbus is a serial communications protocol originally published by Modicon (now Schneider Electric) in 1979 in order to be used with its programmable logic controllers (PLCs). Modbus has become a standard communication protocol and is now a commonly available mean of connecting industrial electronic devices. Modbus is popular in industrial environments because it is openly published and royalty-free. It was developed for industrial applications, is relatively easy to deploy and maintain compared to other standards, and places few restrictions other than the size on the format of the data to be transmitted.