Rishabh RISH Master 3440 - Page 64

Query :
Start Address High : Most signicant 8 bits of starting address of the parameter requested.
Start Address low :Least signicant 8 bits of starting address of the parameter requested.
Number of register Hi : Most signicant 8 bits of Number of registers requested.
Number of register Lo : Least signicant 8 bits of Number of registers requested.
(Note : Two consecutive 16 bit register represent one parameter.)
Device Address
Function Code
Start Address High
Start Address Low
Number of Registers Hi
Number of Registers Lo
CRC Low
CRC High
01 (Hex)
03 (Hex)
00 (Hex)
0A (Hex)
00 (Hex)
02 (Hex)
E4 (Hex)
09 (Hex)
Each setting is held in the 4X registers .ModBus code 03 is used to read the current setting
and code 16 is used to write/change the setting. Refer Table 5 for 4 X Register addresses.
Example : Reading System type
System type : Start address = 0A (Hex) Number of registers = 02
Note :Number of registers = Number of Parameters x 2
Accessing 4 X register for Reading & Writing :
Note : Parameters 1,2,3 are L-N Voltage for 3P 4W & L-L Voltage for 3P 3W .















30221
30225
30227
30229
30231
78
79
80
81
82
System Current THD( % )
I neutral
Run Hour
On Hour
No. Of Interrupts
00
00
00
00
00
DC
E0
E2
E4
E6
62