Danfoss Modbus RTU Manual page 30

Description
Preset
Presets values into a sequence of holding
Multiple
registers (4x references). When broadcast, the
Registers
function presets the same register references
(10 )
in all attached slaves.
HEX
Query
The query message specifies the register
references to be preset. Registers are
addressed starting at zero. Register 1 is
addressed as 0.
Example of a request to preset two registers starting at 40002 to 00 AA
01 02
Response
The normal response returns the slave
address, function code, starting address, and
quantity of registers preset.
30
, in slave device 1.
HEX
Field Name
Slave Address
Function
Starting Address HI
Starting Address LO
No. of Registers HI
No. of Registers LO
Byte Count
Write Data HI (Register 40001)
Write Data LO (Register 40001)
Write Data HI (Register 40002)
Write Data LO (Register 40002)
Error Check (CRC)
Field Name
Slave Address
Function
Starting Address HI
Starting Address LO
No. of Registers HI
No. of Registers LO
Error Check (CRC)
Example (HEX)
01
10
00
01
00
02
04
00
0A
01
02
–
Example (HEX)
01
10
00
01
00
02
–
APPENDIX A
MG.10.P2.22
and
HEX
VLT is a registered Danfoss trade mark