How to get Modbus Protocol for RS-485 Communication

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Hai All,
Now i am struggling with MODBUS communication protocol for Rs-485 Communication. And how should i communicate my Device via RS-485. Now i didn't get any data from these serialport communication.
Can any one explain me how to communicate devices with RS-485 .

Thanks in ADV,

Posted 8-Mar-12 18:08pm

Himachandra

Updated 28-Apr-19 9:27am

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Member 12969497 · Answer 1 · 2019-04-28T09:28:00

WIN32 C++ code RS485 modbus 4 way relay module. Best compiled with MS Visual studio.
Open source project will allow you to customize according to your requirements. No closed source limitations.

MessageBox(NULL,"WIN32 C++ for MS Visual Studio Rules!",NULL,NULL);

rs485modbus download | SourceForge.net[^]

Sergey Alexandrovich Kryukov · Answer 2 · 2012-03-08T18:37:00

To best of my knowledge, to work with RS-485, you can use exact same class you would use with RS-232: System.IO.Ports.SerialPort, please see:
http://msdn.microsoft.com/en-us/library/system.io.ports.serialport.aspx[^].

Please see:
http://en.wikipedia.org/wiki/Rs-232[^],
http://en.wikipedia.org/wiki/RS-485[^].

Modbus protocol working through a serial port is a very usual thing, even though the serial variants of it are getting obsolete (hopefully). Most likely, you will use Modbus RTU or Modbus ASCII versions of the protocol. Please see:
http://en.wikipedia.org/wiki/Modbus[^],
http://www.modbus.org/[^].

—SA

How to get Modbus Protocol for RS-485 Communication

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