CHAPTER 8: MODBUS FUNCTIONS FUNCTION CODE 06H
SR3 SERIES PROTECTIVE RELAY PLATFORM – COMMUNICATIONS GUIDE 8-9
Function Code 06H
Modbus Implementation: Preset Single Register
3 Series relay Implementation: Store Single Setpoint
This command allows the master to store a single setpoint into the memory of a 3 Series
relay. The slave response to this function code is to echo the entire master transmission.
For example, request slave 17 to store the value 2 in setpoint address 04 5C. After the
transmission in this example is complete, setpoints address 04 5C will contain the value
0002. The master/slave packet format is shown below:
Table 8-4: MASTER/SLAVE PACKET FORMAT FOR FUNCTION CODE 06H
MASTER TRANSMISSION BYTES EXAMPLE DESCRIPTION
SLAVE ADDRESS 1 11 message for slave 17
FUNCTION CODE 1 06 store single setpoint
DATA STARTING ADDRESS 2 04 5C setpoint address 04
5C
DATA 2 00 02 data for setpoint
address 04 5C
CRC 2 CB B9 CRC error code
SLAVE RESPONSE BYTES EXAMPLE DESCRIPTION
SLAVE ADDRESS 1 11 message from slave
17
FUNCTION CODE 1 06 store single setpoint
DATA STARTING ADDRESS 2 04 5C setpoint address 04
5C
DATA 2 00 02 data stored in
setpoint address 04
5C
CRC 2 CB B9 CRC error code
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