Siemens SIRIUS 3RW5 series User Manual

Messages and diagnostics
7.2 Function Codes
SIRIUS 3RW5 Modbus TCP communication module
58 Manual, 03/2018, A5E43676481002A/RS-AA/001
7.2.6
Function Code 16 (Write Multiple Registers)
This function enables the Modbus client system to write several registers from the 3RW5
register memory area.
A valid address from the register memory area is expected as the start address. The
selected address must be designated as writable in the data tables in chapter Data tables
(Page 75).
When writing several registers, they must be identified as a "writable" coherent block. A
register area that is interrupted by read-only registers cannot be written to as a block.
Request telegram
Address Field
Function Code
Start address
Number of registers
Number of bytes
Data
7 bytes
1 byte
2 bytes
2 bytes
1 byte
n x 2 bytes
- 0x10 0x9403 0x0002 0x04 0x0000 0x2710
Response telegram
Address Field
Function Code
Start address
Number of registers
7 bytes
1 byte
2 bytes
2 bytes
- 0x10 0x9403 0x0002
Example
Setting the rated operational current Ie to 100 A:
● Address field: The address of the 3RW5 soft starter is not entered in the example (-).
● The register address of the rated operational current Ie is 0x9403.
● The rated operational current Ie occupies 2 registers.
● The value 100 A is transmitted to the 3RW5 soft starter (0x0000 0x2710).
You can find the data table for the parameters in Parameters (Page 89).

Siemens SIRIUS 3RW5 series Specifications

General

Brand	Siemens
Model	SIRIUS 3RW5 series
Category	Controller
Language	English