Honeywell HC900 - Feature Summary

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