Modbus - Floating point numbers

Floating point data type is possible for use in both input and holding registers, and all possible byte swap combinations are supported.

Register	Mapping	Swap mode	Bytes in 2 16 - bit registers	Resulting 32 - bit floating point
Hf	Holding registers	N/A	[a b][c d]	[a b c d]
Hfs	Holding registers	Byte and word swap	[a b][c d]	[d c b a]
Hfsb	Holding registers	Byte swap	[a b][c d]	[b a d c]
Hfsw	Holding registers	Word swap	[a b][c d]	[c d a b]
Rf	Input registers	N/A	[a b][c d]	[a b c d]
Rfs	Input registers	Byte and word swap	[a b][c d]	[d c b a]
Rfsb	Input registers	Byte swap	[a b][c d]	[b a d c]
Rfsb	Input registers	Word swap	[a b][c d]	[c d a b]