Hi, can you help me with this. I need to control a VFD using my arduino mega 2560. I need to make the VFD start, reduce its frequency ( would be like breaking) and stop. Can you explain to me the different ways to do this and wich one is fastest and easy. My VD have a digital Forward run terminal and also a digital reverse run terminal. I can give you more details if You`re Will into help me. Thanks!!!
No idea if you neglect to provide the details of the VFD in question. The datasheet is the place
to start.
This is the VFD manual
http://www.nhp.com.au/files/editor_upload/File/Product-Tools/Santerno/SINUS_K_R03.1_Manual.pdf
See this so you can understand better
You need to get an RS485 connection and learn to use Modbus.
Is there an easiest way?
There seems to be one way, talking to the RS485 interface - its a serial protocol detailed
in chapter 13 of the manual. You'll need a serial to RS485 converter module, which turns
the normal TTL serial levels into differential pair (which is what RS485 is, basically). You'll
also need to control the direction on the RS485 bus I think - send a command then listen for
the reply.
Have a read of section 13 and see what it can do.