CHAPTER 11: MODBUS PROTOCOL
FUNCTION CODE 05H (EXECUTE OPERATION)
8 SERIES PROTECTIVE RELAY PLATFORM – COMMUNICATIONS GUIDE
11-5
Function Code 05H (Execute Operation)
Modbus Implementation: Force Single Coil
8 Series relay Implementation: Execute Operation
The function code allows the master to request an 8 Series relay to perform specific
command operations.
For example, to request slave 17 to execute operation code 1 (reset), we have the following
master/slave packet format:
Table 11-5: Master Packet Format for Function Code 05H
Table 11-6: Slave Packet Format for Function Code 05H
ASE 2000 V2 Example
--> 00 00 00 00 00 06 FE 05 00 01 FF 00
--> 00 00 00 00 00 06 FE 05 00 01 FF 00
MASTER TRANSMISSION
BYTES
EXAMPLE
DESCRIPTION
SLAVE ADDRESS
1
FE
message for slave 254
FUNCTION CODE
1
05
execute operation
OPERATION CODE
2
00 01
operation code 1
CODE VALUE
2
FF 00
perform function
CRC (low, high)
2
C9 F5
CRC error code
SLAVE RESPONSE
BYTES
EXAMPLE
DESCRIPTION
SLAVE ADDRESS
1
FE
message from slave 17
FUNCTION CODE
1
05
execute operation
OPERATION CODE
2
00 01
operation code 1
CODE VALUE
2
FF 00
perform function
CRC (low, high)
2
C9 F5
CRC error code