Modbus RTU serial Rs485 and Modbus TCP Ethernet protocol

[Risuraj]

I have a Third party H/w have Modbus RTU and TCP interface option.How  can i  communicate to this device through Labview.

i) How to select the NI module for physical interface and API for the same?

ii) Is any serial to usb converter(third party converter) can do the same thing?

iii) For both RTU and Tcp can we use a same Physical interface(serial converter or NI Module)??

[K C]

Hi,

Not clear to e what you are asking.

There is a ModBus library for both serial and TCP

I don't think you wil find the hardware at NI for this. But the TCP I assume you already have that on your computer and TCP or USB to serial are sold everywhere.

Kees