How to develop a RS 485 based protocol in Labview

[Giovani]

In order to make clear for everyone what I'm trying to do I say that I need to implement a RS 485 based protocol( Sunny Boy) to make a DC/AC converter able to communicate with some PCs over a nerwork.

[Dennis_Knutson]

I'm not entirely sure what you need. RS-485 is a hardware specification. To communicate to a device over RS-485, you can buy a cheap RS-232/485 converter or get a RS-485 board for the pc which then appears as an additional comm port. In either case, you would use the VISA serial functions to read and write. The only special thing you might need to do is specify an address since RS-485 supports multi-drop.