This is just a small patch that explain the basics of modbus TCP.
Modbus, and now Modbus TCP is a wide spread industrial protocol which allows you to control or get data from many industrial device such as :
This protocol as been invented by Modicon company (Schneider Electric) but it's openly published and royalty-free.
This patch explain the modbus TCP only, but with a simple converter you can also control RS485 modbus devices.
Hope this will help some of you.
I have try for fun with
the device is connect on my port with the right address, i have set lenght,unit id and fct code...but i can't read or write nothing...
Hi Noir, sorry I did not saw your comment before... I did not receive any email to warn me.. Anyway, if you want to try again can you send me the user manual? I have to suscribe to the website to get it...
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