How do I know if my arduino can generate MODBUS RTU commands?

Hi,

I am trying to use my arduino as a master and a variable frequency drive (VFD) as a slave. If the slave supports MODBUS RTU commands, how do I know if my arduino can send MODBUS RTU commands? What do I need to buy or do? Any advice will help.

Thanks,

Cabi Selva

First of all you need to setup the hardware communication channel. This could be MODBUS over Ethernet, TCP, UDP, or even RS485 etc depending on what your slave is using.

Then you need to implement the MODBUS protocol by programming your arduino to talk to the slave.

If this is you first project with arduino, electronics and programming, I suggest you start with something smaller first and then move to more complicated projects.