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    Probleme of Common mode noise on my RS485 Network

    Hello @jschulze thank you for your participation , i appreciate a lot your advice, that's can help me to solve the probleme. Since i have a ground potentiel difference , making connection for The 'FG' and the ground is not recommended in my case , i think to connect the FG to the ground you...
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    Probleme of Common mode noise on my RS485 Network

    Hello, thanks for your answer sir, For the wiring , i have a twisted Shielded pair , so i use the pair wires to connects A, B and i did connect the schield in one point as recommended, but for the common 'C' or 'GND' , i connected to the PE ground terminal of every slave , since i didn't have a...
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    Probleme of Common mode noise on my RS485 Network

    Hello good people, i'm dealing with a big probleme of my RS485 network on a photovoltaïque power plane. I make Modbus communication with over 26 slave in RS485 in the photovoltaïque field (between inverter and junction box) , everything works fine in the 03 first mouths. Then we notice that...
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    Modbus RTU Transmission Speed

    Hello Engineers, i'm recently working on designing a Modbus RTU network over RS485, i have 13 slaves, the distance between them is 40m, the totale distance is 650m, i will use a twisted paire cable with 22 AWG and 120Ω of characteristic impedance. I want to know how to calculate the...
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    Modbus Rtu to Modbus Tcp convertion !

    Thank you for your reponse , The reason that i'm using Ethernet/fibre converters is to make the communication between the DCS and the other devices through a fiber cable , because of the long distance and to ensure a fast real time response.
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    Modbus Rtu to Modbus Tcp convertion !

    I have 130 devices connected in series with Rs485 by Modbus RTU protocol. I know that RS485 has a limitation of 32 devices per segment. And i can manage that by adding repeaters .. My question is , if i make a convertion of modbus RTU to Modbus Tcp , the problem of limitation can be solved ...
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