Danfoss Modbus RTU - Page 30

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