This is the first time in my life I need to try "Modbus RTU", and as a master I need a RS485 to USB converter which will establish connection to the PC.
I have found some converters in the market which stress and mention their product is Modbus compatible such as this one.
On the other hand there are many other RS485 to USB converters which does not mention Modbus at all.
Below is my basic plan:
I found a converter for this purpose, but its data-sheet does not include a word about Modbus. Isn't Modbus a protocol and the converter itself a physical layer? What is being meant here by saying "Modbus compatible"? Most importantly, how can I know whether this converter supports Modbus RTU or not?