Function Code 06H - GE 350 Communications Manual

CHAPTER 8: MODBUS FUNCTIONS

Function Code 06H

SR3 SERIES PROTECTIVE RELAY PLATFORM – COMMUNICATIONS GUIDE
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
SLAVE ADDRESS
FUNCTION CODE
DATA STARTING ADDRESS
DATA
CRC
SLAVE RESPONSE
SLAVE ADDRESS
FUNCTION CODE
DATA STARTING ADDRESS
DATA
CRC
BYTES EXAMPLE
1 11
1 06
2 04 5C
2 00 02
2 CB B9
BYTES EXAMPLE
1 11
1 06
2 04 5C
2 00 02
2 CB B9
FUNCTION CODE 06H
DESCRIPTION
message for slave 17
store single setpoint
setpoint address 04
5C
data for setpoint
address 04 5C
CRC error code
DESCRIPTION
message from slave
17
store single setpoint
setpoint address 04
5C
data stored in
setpoint address 04
5C
CRC error code
8-9