3X Registers (M820)

The registers are listed with their Modbus addresses.
The data held at these addresses are Read-Only.
3X registers are read using function 04h.
A sample read packet will look like this:-
[Node][04][start address][No. of Double Registers Requested][CRC(2 bytes)]

e.g. To read line to neutral voltages on node 23h:-
[23h][04h][0006h][0006h(3, 4 byte regs)] [CRC(2 bytes)]
The node’s return packet will look like:-
[23h][04h][0Ch][12 bytes of data = 3 floating point numbers] [CRC(2 bytes)]

Example Code