Because you don’t have such a device on the lines. Equipment settings are given in the database for an example of how to do it directly with your equipment.
You need either real equipment and real experiments. Or find on the Internet emulators devices such as Modbus and set up communication with them. Everything is possible.
http://raxp2.blogspot.com/2015/03/modbus.html
The site is in Russian, but if you follow the links, there are English versions of simulators, including free.
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This reply was modified 5 years, 6 months ago by manjey73.
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This reply was modified 5 years, 6 months ago by manjey73.