Hello,

I have an instrument to supervise, it contains a TWIDO we can access via Modbus RTU over TCP.

I have some variables with address like '%M210' (variables TOR) or '%MW50' (variables INTEGER), etc. I want to read or write these variables.

I just know IP address, MASK and gateway of the ethernet card.

So I'm looking for a DLL or ActiveX to do this. Can anyone help me to find one?

I will be very grateful for any help.

Thanks

Tony

 

I saw a very good example of a NET class on this address:
http://www.codeproject.com/cs/library/Modbus_TCP_class.asp?df=100
It has some Q&A at the bottom too.

Regards,
Miroslav St. Jeliaskoff

 

Check http://www.nmodbus.com. Nmodbus is a C# implementation of the modbus protocol. The download also contains a modbus.dll which can be used in other programming languages than C#.