how to transmit and receiverom the data from relay to pc and pc to relay..

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I'm working in MFC and I would like to know how to use the MODBUS protocol to receive and transmit data to one controller from/to the pc.

[edit]changed structure, decapitalized and a 5 for the question itself[/edit]

Posted 29-Mar-11 0:25am

sameera malik

Updated 29-Mar-11 6:41am

Joan M

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Joan M · Answer 1 · 2011-03-29T06:38:00

ufff...

let's see... I knew a guy who would have answered this in 2 secs...

Let's see what we can do...

You can start by downloading/learning about the protocol specs: http://www.modbus.org/specs.php[^].

In this same page you can download the specs: http://www.modbus.org/docs/PI_MBUS_300.pdf[^]

Once you've reached / read that page, then you could proceed to this one in which you will be able to download some libraries, activex or other resources that will make your life easier: http://www.modbus.org/tech.php[^].

Hope this helps! :thumbsup: