Eastron SDM72D-M - Part 3 Modbus Protocol; Modbus Input Register Mapping

B+G e-tech EASTRON SDM72D-M User Manual V1.5 English version
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Input Registers
PART 3 Modbus Protocol
Input registers are used to indicate the present values of the measured and calculated electrical quantities. Each
parameter is held in two consecutive 16 big register. The following table details the 3X register address, and the
values of the the address bytes within the message. A (*) in the column indicated the parameter is valid for the
particular wiring system, Any parameter with a cross (X) will return the value zero. Each parameter is held in the
3X registers. Modbus Protocol function code 04 is used to access all parameters.
For example, to request: Amps 1 Start address = 0006
No.of registers = 0002
Amps 2 Start address = 0008
No. Of register = 0002
Each request for data must be restricted to 30 parameters or less. Exceeding the 30 parameter limit will cause a
Modbus Protocol exception code to be returned.
Address
(Register)
Input Register Parameter
Modbus
Protocol Start
Address Hex
Description
Length
(bytes)
Data
Format
Units
Hi
Byte
Lo
Byte
30053
Total system power.
4
Float
W
00
34
30073
Total Import kWh
4
Float
kWh
00
48
30075
Total Export kWh.
4
Float
kWh
00
4A
30343
Total kWh (1)
4
Float
kWh
01
56
30385
resettable total active energy (1)
4
Float
kWh
01
80
30389
resettable import active energy
4
Float
kWh
01
84
30391
resettable export active energy
4
Float
kWh
01
86
31281
Total import active power
4
Float
W
05
00
31283
Total export active power
4
Float
W
05
02
Notes: 1. Total kWh equals to Import + export.