GE 239

7-6 239 Motor Protection Relay GE Multilin
7 COMMUNICATIONS 7 COMMUNICATIONS
7
7.10 06: STORE SINGLE SETPOINT
• Modbus Implementation:Preset Single Register
• 239 Implementation: Store Single Setpoint
This command allows the master to store a single setpoint into the memory of a 239. The slave
response to this function code is to echo the entire master transmission.
a) MESSAGE FORMAT AND EXAMPLE
Request slave 11 to store the value 0064 in Setpoint address 1020.
After the transmission in this example is complete, Setpoints address 1020 will contain the value
0064.
Master Transmission Bytes Example (hex)
SLAVE ADDRESS - 1 byte 11 message for slave 11
FUNCTION CODE - 1 byte 06 store single setpoint
DATA STARTING ADDRESS - 2 bytes 10 Setpoint address 1020
20
DATA - 2 bytes 00 data for address 1020
64
CRC - 2 bytes 8F CRC calculated by the master
BB
Slave Response Bytes Example (hex)
SLAVE ADDRESS - 1 byte 11 message from slave 11
FUNCTION CODE - 1 byte 06 store single Setpoint
DATA STARTING ADDRESS - 2 bytes 10 Setpoint address 1020
20
DATA - 2 bytes 00 data stored in address 1020
64
CRC - 2 bytes 8F CRC calculated by slave
BB