Siemens SIRIUS 3RW5 - Page 102

Messages and diagnostics
7.2 Function Codes
SIRIUS 3RW5 Modbus communication module
102 Equipment Manual, 03/2020, A5E43676481002A/RS-AC/003
Response telegram
Modbus TCP:
Address Field
Function Code
Number of bytes
Register value
7 bytes
1 byte
1 byte
n registers
- 0x03 0x0C 0x0000 0x2710 0x0000
0x2710 0x0000 0x2710
Modbus RTU:
Slave address
Function Code
Number of bytes
Register value
CRC
1 byte
1 byte
1 byte
n registers
2 bytes
- 0x03 0x0C 0x0000 0x2710
0x0000 0x2710
0x0000 0x2710
-
Example
Reading in the rms phase currents:
● Address Field or slave address: The address of the 3RW5 soft starter is not entered in
the example (-).
● The CRC CHECK is not entered in the example (-).
● The phase currents start at register address 0x880F and include 6 registers.
● As feedback, the measured values of the current rms phase currents (I L1, I L2, I L3) are
returned with 100 A (0x0000 0x2710) each.
You can find the data table for the measured values in chapter Measured values (Page 158).