Jim-
I don't have Labview on this computer, so I am going from memory. You will want to write to a single register the (decimal) value 1143 then 1151. The control word is parameter 301, so the Modbus address is either 301 or 40301. I forget if the NI library uses the 40000 offset. A 40001 offset might also be used, but there are only a few choices, so try them all. One thing to try first is to read the DC bus voltage, parameter 107, to test things out using the query.
