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modbus on VB.net

91
Hi,

I want ot develop an application to communicate using modbus on RS485. How should I start in VB.net or VB 2005.

Thank.
Aug 13 '08 #1
3 6655
Plater
7,872 Expert 4TB
http://en.wikipedia.org/wiki/Modbus and http://en.wikipedia.org/wiki/Rs485
And probably the SerialPort object, since rs485 is very similar to rs232
Aug 13 '08 #2
qfchen
91
Hi Plater,

Do you have info or sample code to implement modbus in VB.net or VB 2005? Thanks.
Aug 15 '08 #3
I'm not sure where this should be posted but I have a board which is accessed via a AT683 ModBus / J-Bus Communications Card

Connection to the main board is via RS232 ribbon cable connection and connection to ModBus / J-Bus is via RS485 using a 9-pin D-type connector

I am finding it very difficult to find someone who could develop some simple VB.Net functions which will read and write to the board.

Does anyone know of someone who could help. I am based in the UK but it can be anywhere

Thanks
Jan 4 '12 #4

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