Readout Examples
Readout Example of a Legacy Dataset Register
The table below shows how to read the rms current on phase 1 (I1) in register 12016.
-
The address of register 12016 equals 12016 - 1 = 12015 = 0x2EEF.
-
The Modbus address of the Modbus server is 1 = 0x01.
|
Request from the Client |
Response from the Server |
||
|---|---|---|---|
|
Field Name |
Example |
Field Name |
Example |
|
Modbus server address |
0x01 |
Modbus server address |
0x01 |
|
Function code |
0x03 |
Function code |
0x03 |
|
Address of register to be read (MSB) |
0x2E |
Data length in bytes |
0x02 |
|
Address of register to be read (LSB) |
0xEF |
Register value (MSB) |
0x02 |
|
Number of registers (MSB) |
0x00 |
Register value (LSB) |
0x2B |
|
Number of registers (LSB) |
0x01 |
CRC (MSB) |
0xNN |
|
CRC (MSB) |
0xNN |
CRC (LSB) |
0xNN |
|
CRC (LSB) |
0xNN |
– |
– |
The content of register 12016 (address 0x2EEF) is 0x022B = 555.
The rms current on phase 1 (I1) is thus 555 A.
Readout Example of the Table of Legacy Dataset Common Registers
The table below shows how to read the table of legacy dataset common registers. This table starts at register 12000 and consists of 114 registers.
-
The address of register 12000 = 0x2EDF.
-
The table length is 114 registers = 0x72.
-
The number of bytes is 114 x 2 = 228 bytes = 0xE4.
-
The Modbus address of the server is 1 = 0x01.
|
Request from the Client |
Response from the Server |
||
|---|---|---|---|
|
Field Name |
Example |
Field Name |
Example |
|
Modbus server address |
0x01 |
Modbus server address |
0x01 |
|
Function code |
0x03 |
Function code |
0x03 |
|
Address of the first register to be read (MSB) |
0x2E |
Data length in bytes |
0xE2 |
|
Address of the first register to be read (LSB) |
0xDF |
Value of register 12000 (MSB) |
0xNN |
|
Number of registers (MSB) |
0x00 |
Value of register 12000 (LSB) |
0xNN |
|
Number of registers (LSB) |
0x72 |
Value of register 12001 (MSB) |
0xNN |
|
CRC (MSB) |
0xNN |
Value of register 12001 (LSB) |
0xNN |
|
CRC (LSB) |
0xNN |
– |
0xNN |
|
– |
– |
– |
0xNN |
|
– |
– |
Value of register 12113 (MSB) |
0xNN |
|
– |
– |
Value of register 12112 (LSB) |
0xNN |
|
– |
– |
CRC (MSB) |
0xNN |
|
– |
– |
CRC (LSB) |
0xNN |