Siemens SIRIUS 3RW5 series User Manual

Messages and diagnostics
7.2 Function Codes
SIRIUS 3RW5 Modbus TCP communication module
Manual, 03/2018, A5E43676481002A/RS-AA/001
55
7.2.3
Function Code 05 (Write Single Coil)
This function enables the Modbus client system to write an individual bit from the 3RW5 bit
memory area.
A valid address from the bit 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).
Request telegram
Address Field
Function Code
Start address
Data
7 bytes
1 byte
2 bytes
2 bytes
- 0x05 0x8200 0x0001
Response telegram
Address Field
Function Code
Start address
Data
7 bytes
1 byte
2 bytes
2 bytes
- 0x05 0x8200 0x0001
Example
Setting the bit address of the "Motor CW" command to a logical one:
● Address field: The address of the 3RW5 soft starter is not entered in the example (-).
● The bit address of "Motor CW" is 0x8200.
You will find the data table for the process image output in chapter Process image output
(PIQ) (Page 81).

Siemens SIRIUS 3RW5 series Specifications

General

Brand	Siemens
Model	SIRIUS 3RW5 series
Category	Controller
Language	English