Modbus Double Register Format
Unsigned/signed 32-bit Register Formats
FP L – Little Endian Format
The value 12345678 Hex will be represented as follows:
Bit 7
Bit 0
Bit 15
Bit 8
Bit 23
Bit 16
Bit 31
Bit 24
Byte 1
Byte 2
Byte 3
Byte 4
78 Hex
56 Hex
34 Hex
12 Hex
Low
High
Low
High
REGISTER N
REGISTER N+1
(High)
(Low)
Revision 13
HC900 Process Controller Communications User Guide
15
April 2017