I wat to develop a software in .net, but I do not konw how to comunicate with my trasceiver in modbus protocol.
Do you know were I can get free .net code examples for controling my transceiver? Just the basic functions, getid, setid, get analog.

The Data Message Format for my transceiver is VERSION NUMBYTES DESTINATION SOURCE DATA GAP(3ms) but my transceiver also handle Modbus. My question is, haw can I send a data message format with modbus in VB.net?

 

The easy way would be to use and ActiveX written by someone else. If you choose a good ActiveX it should be very easy to get comms and set any parameters you like.

Regards
James

 

Check out http://www.automatedsolutions.com for off-the-shelf Modbus master and slave ActiveX Controls that can be used in .NET

Fully functioning evaluation versions are available for download and a ready-to-run HMI application with associated source code is included.

 

You can try our Fieldtalk Modbus Master Library for VB.net. An evaluation version can be download from our web site:
http://www.modbusdriver.com

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modbusDRIVER.com - Modbus Driver and Libraries for Linux, Windows, CE,
.NET, QNX, Solaris, UNIX, Delphi, Java ::: http://www.modbusDRIVER.com

 

Check out NModbus, an open source C# 2.0 implementation of the modbus protocol http://www.nmodbus.com/