Modbus - Floating point numbers - mySCADA Technologies

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]

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